WO2017046929A1 - 放射線装置 - Google Patents
放射線装置 Download PDFInfo
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- WO2017046929A1 WO2017046929A1 PCT/JP2015/076579 JP2015076579W WO2017046929A1 WO 2017046929 A1 WO2017046929 A1 WO 2017046929A1 JP 2015076579 W JP2015076579 W JP 2015076579W WO 2017046929 A1 WO2017046929 A1 WO 2017046929A1
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- Prior art keywords
- light source
- lighting
- unit
- radiation
- led
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/08—Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/06—Diaphragms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4494—Means for identifying the diagnostic device
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
Definitions
- the present invention relates to a radiation apparatus provided with radiation irradiation means for irradiating a subject with radiation, and more particularly to a technique for controlling a radiation irradiation field.
- An X-ray imaging apparatus includes an X-ray tube (radiation irradiation means) that irradiates an X-ray toward a subject, and a collimator (X-ray diaphragm) that controls an X-ray irradiation region from the X-ray tube with a leaf;
- An X-ray detector X-ray film, CR (Computed Radiation) or FPD (Flat Panel Detector) that detects X-rays transmitted through the subject via a collimator is provided.
- a rectangular X-ray irradiation field formed by the collimator is, for example, a vertical dimension adjustment knob and a horizontal dimension adjustment knob provided on the panel surface of the collimator.
- the length of the two sides can be adjusted.
- performing this adjustment while monitoring the subject while irradiating the subject with X-rays before X-ray imaging leads to an increase in subject exposure.
- the collimator normally incorporates an irradiation field lamp (collimator lamp) serving as a light source, and emits visible light (hereinafter abbreviated as “light”) instead of X-rays. It has a function to do.
- the collimator lamp for irradiating light is turned on by a lighting button. For example, the collimator lamp is automatically turned off when a predetermined time (for example, 30 seconds) elapses when the lighting button is pressed once. Yes.
- the collimator lamp can be continuously lit even if the predetermined time is exceeded by repeating the pressing of the lighting button again immediately after the above-mentioned predetermined time has passed and the collimator lamp is extinguished. .
- the collimator lamp uses a halogen lamp that generates a large amount of heat. If the collimator lamp is turned on for a long period of time exceeding a predetermined time, the temperature of the exterior of the device may rise due to the heat generated from the halogen lamp, causing overheating. Therefore, an X-ray imaging apparatus that limits temperature by limiting the lighting time of the collimator lamp so as not to exceed the set temperature has been proposed by the present applicant (see, for example, Patent Document 1).
- the control unit controls the relationship between the lighting time of the irradiation field lamp (collimator lamp) and the temperature rise, and turns off the collimator lamp.
- a pseudo temperature counter that calculates the current temperature of the collimator lamp from the storage unit that stores temperature rise / fall data indicating the relationship between time and temperature drop, and the temperature rise / fall time of the collimator lamp and the stored temperature rise / fall data
- the temperature of the collimator lamp calculated by the pseudo temperature counter exceeds the set temperature, the lighting of the collimator lamp is prohibited, and when the temperature of the collimator lamp calculated by the pseudo temperature counter falls below the set temperature
- a lighting control unit that permits lighting of the collimator lamp.
- the configuration described above can prevent the temperature of the device from exceeding a certain level without increasing the manufacturing cost of the device. Further, X-ray imaging can be resumed when the temperature of the apparatus falls below a certain level.
- an X-ray imaging apparatus that changes and controls a set lighting time according to a work time required by a user such as an engineer (see, for example, Patent Document 2).
- an X-ray imaging apparatus that controls the lighting time according to the power consumption of the collimator lamp and the remaining power of the battery in a mobile X-ray imaging apparatus equipped with a battery (see, for example, Patent Document 3).
- the device cannot be used when the collimator lamp is turned off due to temperature limitation, and the irradiation field can be further adjusted. There is a problem that it is not possible. As a result, a user such as an engineer cannot use the device at the timing at which he / she wants to use the device, causing a problem of inconvenience that the patient as a patient is kept waiting.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2012-55421 described above, It was necessary to provide protection such as temperature limitation in consideration of the temperature. Therefore, by using a light source with low power consumption such as a light emitting diode (LED: “Light” Emitting “Diode”), illuminance equivalent to that of a halogen lamp can be obtained with power consumption of about 10 W to 20 W. Therefore, even if the light emitting diode (LED) is continuously turned on, the temperature of the exterior of the apparatus does not become high, so it is not necessary to consider the exterior temperature.
- LED light emitting diode
- an X-ray imaging apparatus having a collimator lamp made of LEDs has been used.
- the entire apparatus needs to be prepared.
- an alternating current power source cannot be directly taken in, and it is necessary to prepare an AC / DC conversion board for converting alternating current to direct current. Therefore, in order to improve versatility, a device has been developed that has a configuration in which both of the halogen lamp and the LED can be controlled to be switched to one of them.
- the AC / DC conversion board When using such a device, in addition to the AC / DC conversion board, it can be connected to both a halogen lamp and an LED, and can be switched to either one, or a halogen for lighting the halogen lamp. It is only necessary to prepare a lamp control board (halogen lamp lighting circuit) and an LED control board (LED lighting circuit) for lighting the LED, and an X-ray imaging apparatus other than the AC / DC conversion board and the control board. Existing equipment can be used.
- the AC / DC conversion board and the control board are mounted on the apparatus main body.
- the lighting control unit configured by a central processing unit (CPU) or the like indicates that the LED is connected. By detecting, the lighting control unit can ignore the temperature limit. However, a setting for notifying the lighting control unit that the LED is connected is necessary.
- these AC / DC conversion boards and control boards are mounted on the main body of the apparatus and the apparatus is assembled before shipment.
- these AC / DC conversion boards and control boards are mounted on the apparatus main body during maintenance. Therefore, an assembly person at the time of shipment or a service person at the time of maintenance manually performs setting for notifying the lighting control unit that the LED is connected.
- an assembly person at the time of shipment or a service person at the time of maintenance manually performs setting for notifying the lighting control unit that the LED is connected.
- it takes time for setting and there is a risk of erroneous setting When manually set by a person such as an assembler at the time of shipment or a service person at the time of maintenance, it takes time for setting and there is a risk of erroneous setting.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a radiation apparatus capable of preventing the risk of erroneous setting and automatically performing switching setting of a light source.
- a radiation apparatus is a radiation apparatus that includes radiation irradiating means for irradiating a subject with radiation, and irradiates the radiation field with visible light.
- Light source lighting control means for controlling lighting of the light source, lighting time limiting means for limiting the lighting time of the light source so as to be below a predetermined temperature, and the type of the light source connected to the apparatus main body.
- a light source type discriminating unit for discriminating, and the light source lighting control unit changes a lighting time limited by the lighting time limiting unit based on a result of discrimination by the light source type discriminating unit. .
- the temperature falls below a predetermined temperature.
- lighting time limiting means for limiting the lighting time of the light source and light source type determination means for determining the type of the light source connected to the apparatus main body.
- the light source lighting control means changes the lighting time limited by the lighting time limiting means, so that It is not necessary for a person such as an assembler or a maintenance service person to manually set the light source, and the light source switching setting can be automatically performed.
- the lighting time limited by the lighting time limiting unit is changed based on the determination result by the light source type determining unit, the risk of erroneous setting can be prevented. For example, even when a light source of a large amount of heat (for example, a halogen lamp) is actually connected, by automatically determining the type of the light source as a connection target, the lighting time is limited to prevent overheating.
- the lighting time is set to a long time by automatically determining the type of the light source as the connection target, and continues for a long time. To use. Therefore, it is possible to prevent overheating when there is a possibility of overheating of the exterior temperature using a type of light source that generates a large amount of heat, and long when there is no possibility of overheating of the exterior temperature using a type of light source that generates less heat. It can be used continuously in time. As a result, the risk of erroneous setting can be prevented, and the light source switching setting can be performed automatically.
- a light source for example, LED
- a radiation device different from the first invention (referred to as “second invention”) is a radiation device comprising radiation irradiating means for irradiating a subject with radiation, Connected to the apparatus main body, a light source that irradiates the irradiation field with visible light, a light source lighting control unit that controls lighting of the light source, a lighting time limiting unit that limits a lighting time of the light source so as to be lower than a predetermined temperature, A light source type discriminating unit for discriminating the type of the light source, and when the light source is a semiconductor light source as a result of discrimination by the light source type discriminating unit, the light source lighting control unit is invalidated It is characterized by that.
- the radiation apparatus in addition to the light source that irradiates the radiation field with visible light and the light source lighting control means that controls the lighting of the light source.
- lighting time limiting means for limiting the lighting time of the light source so as to be below a predetermined temperature
- light source type determining means for determining the type of the light source connected to the apparatus main body.
- the lighting time limit means is controlled to turn on the light source. Means invalidate.
- the semiconductor light source is composed of a semiconductor light source that generates little heat, such as a laser diode (LD: Laser ⁇ ⁇ Diode) that emits visible light in phase and an LED as described above. Therefore, when a semiconductor light source with small heat generation is actually connected, the lighting time limit means is disabled, so that the lighting time is set long and used continuously for a long time.
- LD Laser ⁇ ⁇ Diode
- the lighting time limiting means is enabled to limit the lighting time to prevent overheating. . Therefore, when there is no possibility of overheating of the exterior temperature using a semiconductor light source that generates a small amount of heat, the lighting time limiting means is disabled to enable continuous use for a long time. As a result, the risk of erroneous setting can be prevented, and the light source switching setting can be performed automatically.
- a semiconductor light source for example, a halogen lamp
- a radiation apparatus is a radiation apparatus provided with radiation irradiation means for irradiating a subject with radiation.
- a light source that irradiates visible radiation to a radiation field, a light source lighting control unit that controls lighting of the light source, and a lighting power limiting unit that limits a lighting power of the light source so as to be equal to or lower than a predetermined temperature;
- a light source type discriminating unit that discriminates the type of the light source connected to the apparatus main body, and based on a result of discrimination by the light source type discriminating unit, the lighting power limited by the lighting power limiting unit is controlled by the light source lighting control. The means is changed.
- the temperature is below a predetermined temperature.
- a lighting power limiting means for limiting the lighting power of the light source and a light source type determining means for determining the type of the light source connected to the apparatus main body are provided.
- the light source lighting control means changes the lighting power limited by the lighting power limiting means. It is not necessary for a person such as an assembler or a maintenance service person to manually set the light source, and the light source switching setting can be automatically performed. Further, since the lighting power limited by the lighting power limiting means is changed based on the determination result by the light source type determining means, the risk of erroneous setting can be prevented.
- the lighting power is automatically determined after the lighting time is monitored by, for example, a timer by automatically determining the type of the light source as a connection target. Lower to limit to prevent overheating.
- a light source of a low heat generation type for example, LED
- it can be turned on even after monitoring the lighting time with a timer, for example, by automatically determining the type of the light source as the connection target. Set with a lower power reduction rate.
- a radiation apparatus is a radiation apparatus provided with radiation irradiation means for irradiating a subject with radiation.
- a light source that irradiates visible radiation to a radiation field, a light source lighting control unit that controls lighting of the light source, and a lighting power limiting unit that limits a lighting power of the light source so as to be equal to or lower than a predetermined temperature;
- a light source type discriminating unit for discriminating the type of the light source connected to the apparatus main body, and when the light source is a semiconductor light source as a result of discrimination by the light source type discriminating unit, the lighting power limiting unit is connected to the light source.
- the lighting control means is invalidated.
- the radiation apparatus in addition to the light source that irradiates the radiation field with visible light and the light source lighting control means that controls the lighting of the light source.
- lighting power limiting means for limiting the lighting power of the light source so as to be lower than a predetermined temperature
- light source type determining means for determining the type of the light source connected to the apparatus main body.
- the lighting power limiting means is controlled to turn on the light source. Means invalidate.
- the semiconductor light source is composed of a semiconductor light source that generates little heat, such as a laser diode (LD) or an LED as described above. Therefore, when a semiconductor light source with low heat generation is actually connected, the lighting power limiting means is disabled, so that the lighting power is set or set large without lowering.
- LD laser diode
- the lighting power limiting means is enabled to reduce the lighting power and prevent overheating. To do. Therefore, when there is no possibility of overheating of the exterior temperature using a semiconductor light source that generates a small amount of heat, it is possible to set the lighting power without setting it down or to set it large by disabling the lighting power limiting means. . As a result, the risk of erroneous setting can be prevented, and the light source switching setting can be performed automatically.
- the light source type discriminating unit detects that the light source is connected.
- the type of the light source can be determined.
- the light source type determining means detects that the light source lighting control means is mounted on the control board dedicated to the light source for turning on the light source.
- the determination of the type of light source can be realized only by mounting a lighting control means (for example, CPU).
- the lighting time / lighting power limiting means for limiting the lighting time / lighting power of the light source so as to be equal to or lower than a predetermined temperature
- the apparatus main body A light source type discriminating unit for discriminating the type of the light source connected to the light source, and based on the result of discrimination by the light source type discriminating unit, the lighting time / lighting power limited by the lighting time / lighting power limiting unit Will change.
- lighting time / lighting power limiting means for limiting the lighting time / lighting power of the light source so as to be equal to or lower than a predetermined temperature
- a light source type discriminating unit for discriminating the type of the light source connected to the apparatus main body, and when the light source is a semiconductor light source according to the result of the discrimination by the light source type discriminating unit, the lighting time / lighting power limiting unit is a light source lighting control unit Disable.
- FIG. 5 is a control board and peripheral circuits according to the first embodiment, which are used to explain a light source type determination unit.
- 7 is a halogen lamp control board (halogen lamp lighting circuit) and a peripheral circuit according to a second embodiment for explaining a light source type determination unit.
- FIG. 5 is an LED control board (LED lighting circuit) and a peripheral circuit according to a second embodiment for explaining a light source type determination unit;
- It is the control board and peripheral circuit which concern on the modification for the description of a light source kind discrimination
- FIG. 1 is a schematic diagram of an X-ray imaging apparatus according to each embodiment
- FIG. 2 is a block diagram of the X-ray imaging apparatus according to each embodiment
- FIG. 3 shows a collimator lamp arranged in the X-ray tube. It is the schematic when installing.
- X-rays will be described as an example of radiation
- an X-ray imaging apparatus that performs X-ray imaging will be described as an example of a radiation apparatus.
- the X-ray imaging apparatus 1 is an X-ray tube suspension that suspends and supports an X-ray tube 22 so as to be movable along the ceiling.
- Unit 2 an X-ray imaging stand unit 3 that performs X-ray imaging with the subject M in a standing posture, a supine table unit 4 that performs X-ray imaging with the subject M in a supine posture, and the subject M
- An image processing unit 5 (not shown in FIG. 1) that performs image processing on an X-ray image is provided. As shown in FIG.
- the X-ray tube suspension unit 2, the X-ray imaging stand unit 3, the lying table unit 4, and the image processing unit 5 are electrically connected to each other by a communication cable 6.
- the X-ray tube suspension unit 2, the X-ray imaging stand unit 3, the lying table unit 4 and the image processing unit 5 are configured to be able to communicate with each other.
- the X-ray tube suspension unit 2 includes a column 21 that can move along the ceiling and can be vertically expanded and contracted, and an X-ray tube 22 that is supported by the column 21 and whose direction can be adjusted. Yes.
- the X-ray tube suspension unit 2 includes a position detector 23 for detecting the position and angle of the X-ray tube 22 and an analog voltage of position information obtained by the position detector 23 as digital data.
- an A / D converter 24 for conversion into
- the X-ray tube suspension unit 2 includes a memory unit 25, an input unit 26, an output unit 27, a control unit 28, and an irradiation field lamp (collimator lamp) 29.
- the X-ray tube 22 corresponds to the radiation irradiating means in the present invention
- the control unit 28 corresponds to the light source lighting control means, the lighting time limiting means, and the light source type determining means in the present invention, and an irradiation field lamp (collimator lamp) 29.
- the light source in the present invention.
- the X-ray imaging stand unit 3 includes a standing stand 31 that supports a subject M in a standing posture, and a flat panel X-ray that is mounted on the standing stand 31 and can be moved up and down. And a detector (FPD) 32. Further, as shown in FIG. 2, the X-ray imaging stand unit 3 includes a position detection unit 33 that detects the position of the FPD 32, and an analog voltage of position information obtained by the position detection unit 33, which is converted into digital data. And a D converter 34. In addition, the X-ray imaging stand unit 3 includes a memory unit 35 and a control unit 36. Similar to the X-ray tube suspension unit 2, the X-ray imaging stand unit 3 may include an input unit and an output unit. Even if the X-ray imaging stand unit 3 is not provided with the memory unit 35 or the control unit 36, the control unit 28 of the X-ray tube suspension unit 2 may directly control the FPD 32 of the X-ray imaging stand unit 3 or the like. Good.
- the lying table unit 4 includes a lying table 41 on which the subject M is placed in a lying position, and a flat panel X-ray detector that is mounted on the lying table 41 and can move horizontally. (FPD) 42.
- the position table unit 4 includes a position detector 43 that detects the position of the FPD 42 and an A / D that converts an analog voltage of position information obtained by the position detector 43 into digital data. And a converter 44.
- the lying table unit 4 includes a memory unit 45 and a control unit 46. Similar to the X-ray tube suspension unit 2, the lying table unit 4 may include an input unit and an output unit. Further, the control unit 28 of the X-ray tube suspension unit 2 may directly control the FPD 42 of the position table unit 4 without including the memory unit 45 and the control unit 46 in the position table unit 4.
- the image processing unit 5 performs image processing based on the X-ray output signal obtained by the FPD 32 of the X-ray imaging stand unit 3 or the FPD 42 of the lying table unit 4 and performs an X-ray image (X An image processing unit 51 for creating a line image) is provided.
- the image processing unit 5 includes a memory unit 52 for writing and storing X-ray images. Similar to the X-ray tube suspension unit 2, the image processing unit 5 may include an input unit and an output unit. Further, the image processing unit 5 may be configured not to include the memory unit 52 but to write and store the X-ray image in the memory unit 25 of the X-ray tube suspension unit 2.
- the support column 21 of the X-ray tube suspension unit 2 is movable along a rail R laid along the ceiling.
- the rail R is laid along the depth direction of the paper surface of FIG. 1, and the support column 21 is movable along the depth direction.
- the support column 21 is configured to be extendable and retractable, and the X-ray tube 22 is supported by the support column 21 so that the X-ray tube 22 can be moved horizontally and vertically.
- the direction of the X-ray tube 22 can be adjusted. Accordingly, the X-ray tube 22 is moved up and down as shown in the solid line in FIG. 1 toward the standing stand 31 of the X-ray imaging stand unit 3 to adjust the direction and adjust the X-ray in a standing posture. It is possible to take a picture. Further, the X-ray tube 22 is moved up and down as shown in the two-dot chain line in FIG. It is also possible to perform line photography.
- the X-ray tube 22 is provided with a position detector 23, and the position detector 23 detects the position and angle of the X-ray tube 22.
- the position detector 23 is composed of, for example, a potentiometer, and the resistance value of the potentiometer changes with the movement or rotation of the X-ray tube 22, and the output voltage changes with respect to the reference voltage according to the resistance value.
- This output voltage is an analog voltage, and an analog voltage of position information (including an angle) obtained by the potentiometer is sent to the A / D converter 24.
- the A / D converter 24 converts the analog voltage into digital data. .
- the memory unit 25 of the X-ray tube suspension unit 2 writes and stores the X-ray image acquisition area for each radiographing and the radiographing position for each radiographing via the control unit 28, and reads them out as necessary.
- the memory unit 25 of the X-ray tube suspension unit 2, the memory unit 35 of the X-ray imaging stand unit 3, the memory unit 45 of the lying table unit 4, and the memory unit 52 of the image processing unit 5 are ROM (Read-only). Memory (RAM), RAM (Random-Access Memory), and other storage media.
- the input unit 26 of the X-ray tube suspension unit 2 sends data and commands input by the operator to the control unit 28.
- the input unit 26 includes a pointing device represented by a mouse, a keyboard, a joystick, a trackball, a touch panel, and the like.
- the collimator lamp 29 is turned on for a predetermined time by pressing a lighting button (not shown), and the collimator lamp 29 is automatically turned off when the predetermined time has elapsed.
- the output unit 27 of the X-ray tube suspension unit 2 includes a display unit represented by a monitor or the like, a printer, and the like. When the output unit 27 is a display unit, output is displayed. When the output unit 27 is a printer, output printing is performed.
- the output unit 27 may be configured by a touch panel equipped with the above-described lighting button, and the touch panel may be attached to the X-ray tube 22. As described above, the function of the input unit 26 may be mounted on the output unit 27.
- the control unit 28 of the X-ray tube suspension unit 2 comprehensively controls each part constituting the X-ray tube suspension unit 2.
- the control unit 28 of the X-ray tube suspension unit 2, the control unit 36 of the X-ray imaging stand unit 3, the control unit 46 of the lying table unit 4, and the image processing unit 51 of the image processing unit 5 are a central processing unit. (CPU) etc. are comprised by the control board.
- CPU central processing unit
- the control unit 28 has a function of type discrimination means.
- the function of the lighting time limiting means for limiting the lighting time of the collimator lamp 29 so as to be below a predetermined temperature, and further the function of the light source type determining means.
- the control unit 28 has a function of changing the lighting time limited by the lighting time limiting means based on the result of the determination.
- the collimator lamp 29 of the X-ray tube suspension unit 2 is built in a collimator (X-ray diaphragm) 22a for controlling the X-ray irradiation field from the X-ray tube 22 as shown in FIG.
- a leaf 22b and a reflecting mirror 22c that can change the size of the irradiation field are provided, and visible light (light) emitted from the collimator lamp 29 is reflected by the reflecting mirror 22c and passes through the leaf 22b.
- the size of the irradiation field also referred to as “lighting field”
- irradiation field also referred to as “lighting field”
- the collimator lamp 29 illuminates the entire irradiation field adjusted by the leaf 22b of the collimator 22a with visible light (light).
- the collimator lamp 29 is composed of a halogen lamp or a light emitting diode (LED), and is configured to switch to either one.
- the standing stand 31 of the X-ray imaging stand unit 3 is installed with respect to the floor surface.
- the FPD 32 of the X-ray imaging stand unit 3 can be moved up and down along the standing stand 31.
- the supine table 41 of the supine table unit 4 is also installed with respect to the floor surface.
- the FPD 42 of the lying table unit 4 can move horizontally within the lying table 41.
- a position detector 33 is disposed in the FPD 32 of the X-ray imaging stand unit 3, and the position detector 33 detects the position of the FPD 32.
- a position detector 43 is also provided in the FPD 42 of the lying table unit 4, and the position detector 43 detects the position of the FPD 42.
- the position detector 33 of the X-ray imaging stand unit 3 and the position detector 43 of the lying table unit 4 are also composed of potentiometers for moving the FPDs 32 and 42. Along with this, the resistance value of the potentiometer changes, and the output voltage changes with respect to the reference voltage in accordance with the resistance value.
- This output voltage is an analog voltage
- the analog voltage of the position information obtained by the potentiometer is sent to the A / D converter 34 in the case of the X-ray imaging stand unit 3, and in the case of the position table unit 4.
- the A / D converters 34 and 44 convert the analog voltages into digital data.
- the analog voltage of the position information obtained by the potentiometer of the X-ray imaging stand unit 3 or the lying table unit 4 is also sent to the X-ray tube suspension unit 2 via the communication cable 6.
- the memory unit 35 of the X-ray imaging stand unit 3 writes and stores the upper end position and the lower end position of the FPD 32 in X-ray imaging, and reads them out as necessary.
- the memory unit 45 of the prone position table unit 4 writes and stores the left end position and the right end position of the FPD 42 in X-ray imaging, and reads them out as necessary.
- the control unit 36 of the X-ray imaging stand unit 3 controls each part constituting the X-ray imaging stand unit 3, and the control part 46 of the lying table unit 4 controls each part constituting the lying table unit 4. Take overall control.
- the control unit 28 of the X-ray tube suspension unit 2 and the control unit 36 of the X-ray imaging stand unit 3 are electrically connected by the communication cable 6, and the control unit 28 of the X-ray tube suspension unit 2 and the prone table
- the control unit 46 of the unit 4 is electrically connected by the communication cable 6, and the control unit 28 of the X-ray tube suspension unit 2 and the image processing unit 51 of the image processing unit 5 are electrically connected by the communication cable 6. Connecting. By connecting in this way, the X-ray tube suspension unit 2, the X-ray imaging stand unit 3, the lying table unit 4 and the image processing unit 5 are configured to be able to communicate with each other.
- control units 28, 36, and 46 drive and control the X-ray tube 22 and the FPDs 32 and 42
- control units 28, 36, and 46 control the motor (not shown) to control the X-ray tube 22 and the FPDs 32 and 42.
- the FPDs 32 and 42 are driven by a motor. By driving the motor, the X-ray tube 22 and the FPDs 32 and 42 can be controlled to desired positions, and the direction of the X-ray tube 22 can be adjusted at a desired angle.
- FIG. 4 illustrates a control board and peripheral circuits according to the first embodiment for explaining the light source type determination unit.
- the control unit 28 includes a control board 70 having a function of a light source type determining unit, and has a function of a light source lighting control unit and a function of a lighting time limiting unit.
- a central processing unit (CPU) 71 is mounted on a control board 70.
- one control board 70 can be connected to both the halogen lamp H and the light emitting diode (LED) L, and is configured to switch to either one.
- the CPU 71 is exclusively used for the function of the light source lighting control means and incorporates the function of the lighting time limiting means.
- control board 70 is mounted on the main body of the apparatus (the X-ray imaging apparatus 1 in FIGS. 1 and 2).
- the control board 70 is electrically connected to each part constituting the X-ray imaging apparatus 1 as the control unit 28 as shown in FIG.
- control board 70 is electrically connected to the halogen lamp H via the halogen lamp connector 72 and electrically connected to the light emitting diode (LED) L via the LED connector 73. Yes. Further, the control board 70 is electrically connected to the lamp lighting switch S via the switch connector 74.
- the halogen lamp connector 72 and the switch connector 74 have two pins (connection terminals), and the LED connector 73 has four pins (connection terminals).
- Pin 1 (indicated by “1” in FIG. 4) and pin 2 (indicated by “2” in FIG. 4) of the halogen lamp connector 72 are connected to the halogen lamp H, and the halogen lamp connector 72 is controlled.
- the board 70 By inserting the board 70, the first pin is electrically connected to a 24V DC power supply, and the second pin is electrically connected to the CPU 71 via a transistor.
- the 24V DC power supply is electrically connected to an AC / DC conversion board (not shown), and supplies AC to the halogen lamp H after converting AC to 24V DC voltage.
- the halogen lamp H it is possible to turn on with an alternating current, so an alternating current power supply may be directly taken in.
- the first pin (indicated by “1” in FIG. 4) and the second pin (indicated by “2” in FIG. 4) of the switch connector 74 are connected to the lamp lighting switch S, and the switch connector 74 is connected to the control board.
- the first pin is electrically connected to a resistor connected to a DC power supply of 5V in the middle, and is electrically connected to the CPU 71.
- the second pin is grounded.
- the first pin (indicated by “1” in FIG. 4) and the second pin (indicated by “2” in FIG. 4) of the LED connector 73 are connected to a light emitting diode (LED) L, and the LED connector 73 is connected to the LED connector 73.
- the first pin is electrically connected to a 14V DC power supply
- the second pin is electrically connected to the CPU 71 via a transistor.
- the 14V DC power supply is electrically connected to an AC / DC conversion board (not shown), and supplies power to the light emitting diode (LED) L after converting AC to a DC voltage of 14V.
- the third pin (indicated by “3” in FIG. 4) and the fourth pin (indicated by “4” in FIG. 4) of the LED connector 73 are configured to be short-circuited (short-circuited) by a cable.
- the third pin is electrically connected to a high resistance (for example, 10 k ⁇ ) connected to a DC power supply of 5 V in the middle, and the fifth pin of the CPU 71 (FIG. 4). Then, it is electrically connected to “5”.
- the fourth pin is grounded.
- the fifth pin of the CPU 71 becomes High logic when the voltage is 3.7V to 5V, and becomes Low logic when the voltage is 0V to 0.7V.
- the reason why the threshold voltage is given to the voltage for detecting the logic is to consider a voltage drop and noise in the case of High logic, and to consider noise in the case of Low logic.
- By giving a threshold margin to the voltage for detecting logic even in the case of high logic, even if there is a voltage drop or noise, it can be within the range of 3.7V to 5V, and in the case of low logic Even if there is noise, it can be in the range of 0V to 0.7V. Therefore, erroneous detection can be prevented even if there is a voltage drop or noise.
- the threshold range of the voltage for detecting logic is limited to the above-described range (the voltage for detecting High logic is in the range of 3.7V to 5V, and the voltage for detecting Low logic is in the range of 0V to 0.7V). Not.
- the LED connector 73 connected to the light emitting diode (LED) L is not inserted into the control board 70.
- the pin is pulled up to approximately 5 V by a 5 V DC power source connected in the middle to become High logic.
- a slight voltage drop occurs due to the resistance connected to the DC power supply of 5 V.
- the resistance is a high resistance of, for example, about 10 k ⁇ , the current flowing through the resistance is on the order of microamperes ( ⁇ A) and the voltage drop is reduced. Can be ignored.
- the light source connected to the control board 70 is the halogen lamp H
- the light source connected to the control board 70 is detected by detecting that the 5th pin of the CPU 71 becomes High logic.
- the lamp H is detected, and it is automatically determined that the detected type of the light source is the halogen lamp H.
- control unit 28 for limiting the lighting time of the light source by the control unit 28 include, for example, the following control methods 1 to 4.
- a halogen lamp When using a halogen lamp, for example, it counts up 2 counts per second while it is lit, and counts down 1 count per second when it is off. That is, when the halogen lamp is turned off in twice the lighting time, the count value before lighting is maintained. Note that if the countdown is performed to “0”, the countdown to minus is not performed and “0” is maintained. When this count value reaches, for example, 600 counts, lighting is stopped.
- the collimator lamp will not be forcibly turned off without protection such as temperature limitation as long as the halogen lamp lighting time and lighting time are maintained at 1: 2.
- protection such as temperature limitation as long as the halogen lamp lighting time and lighting time are maintained at 1: 2.
- control method 1 This example is a calculation when the gradient of temperature rise is twice as steep as the gradient of temperature drop when a halogen lamp is used.
- control method 1 the control method based on this calculation is referred to as “control method 1”.
- halogen lamp For example, lighting is prohibited when the halogen lamp reaches 600 counts, but lighting is prohibited when the LED reaches 1200 counts.
- the halogen lamp counts up 2 counts per second, but the LED counts up 1 count per second.
- Control Method 1 as disclosed in Japanese Patent Application Laid-Open No. 2012-55421 is a complicated calculation / control, but can be realized by a CPU. Even if the calculation and control are not complicated as in the control method 1, for example, the following simple control methods 2 to 4 may be used.
- Control method 2 When a halogen lamp is used, for example, if it is lit continuously for 5 minutes, then it is prohibited to light for 10 minutes with a temperature limit.
- this control method is referred to as “control method 2” in the present specification.
- the LED When the LED is used, the lighting time limited by the lighting time limiting means is changed by the control method 2 as follows.
- the temperature is limited after lighting for 5 minutes continuously, but in the LED, the temperature is limited after lighting for 10 minutes continuously.
- Control method 3 When using a halogen lamp, for example, if it is lit continuously for 5 minutes, the lighting is prohibited before the device is restarted after the temperature is limited. In other words, if the device is restarted after 5 minutes of continuous lighting, the protection such as temperature limitation is canceled. Therefore, when the temperature increase gradient is twice as steep as the temperature decrease gradient, a user such as an engineer takes care not to restart the apparatus within 10 minutes immediately after the temperature limit is applied.
- this control method is referred to as “control method 3” in the present specification.
- control method 3 When the LED is used, the lighting time limited by the lighting time limiting means is changed by the control method 3 as follows.
- the halogen lamp was turned on for 5 minutes after being lit continuously, but as with control method 2, the LED is turned on for 10 minutes and then the temperature is turned on.
- this control method is referred to as “control method 4” in the present specification.
- control method 4 When the LED is used, the lighting time limited by the lighting time limiting means is changed by the control method 4 as follows.
- the temperature is limited so that only 10 seconds can be lit by pressing the lighting button once for 10 minutes after 5 minutes of continuous lighting. Temperature is limited so that it can be lit up to 25 seconds when pressed once.
- a light source (collimator lamp in each embodiment) that emits visible light (light) to an irradiation field of radiation (X-rays in each embodiment). 29) and the light source lighting control means (CPU 71 in FIG. 4) for controlling the lighting of the light source (collimator lamp 29), and the lighting time of the light source (collimator lamp 29) is limited to a predetermined temperature or lower.
- a lighting time limiting unit (incorporated in the CPU 71 in FIG. 4) and a light source type determining unit (control board 70 in FIG. 4) for determining the type of the light source connected to the apparatus main body are provided.
- the temperature of the apparatus exterior is prevented from overheating.
- the lighting time limited by the lighting time limiting means (incorporated in the CPU 71) is determined as the light source.
- the lighting time limited by the lighting time limiting means (incorporated in the CPU 71) is changed based on the determination result by the light source type determining means (control board 70), the risk of erroneous setting can be prevented. For example, even when a light source of a large amount of heat (for example, a halogen lamp) is actually connected, by automatically determining the type of the light source as a connection target, the lighting time is limited to prevent overheating. On the other hand, even if a light source (for example, LED) that generates a small amount of heat is actually connected, the lighting time is set to a long time by automatically determining the type of the light source as the connection target, and continues for a long time. To use.
- a light source of a large amount of heat for example, a halogen lamp
- the light source type discriminating means detects that the light source is connected. As shown in FIG. 4, the light source (halogen lamp H or light emitting diode (LED) L in FIG. 4) connected to the control board 70 is detected (in FIG. 4, the 5th pin of the CPU 71 becomes High logic or Low logic.
- the type of the detected light source is determined. In the case of the first embodiment, the type of the light source can be determined simply by preparing one control board and connecting the light source to the control board mounted on the apparatus main body.
- FIG. 5 is a halogen lamp control board (halogen lamp lighting circuit) and a peripheral circuit according to the second embodiment for explaining the light source type discriminating means
- FIG. 6 is used for explaining the light source type discriminating means.
- FIG. 6 is an LED control board (LED lighting circuit) and a peripheral circuit according to Embodiment 2.
- the light source type discriminating means is the control board 70 as shown in FIG. 4, but in this second embodiment, a control board (halogen lamp control board) for turning on the halogen lamp and The control board (LED control board) for lighting the LEDs is separately provided, and the same CPU (light source lighting control means) is mounted on each of them.
- halogen lamp control board 80 shown in FIG. 5 or the LED control board (LED lighting circuit) 90 shown in FIG. And in FIG. 2, it mounts in the X-ray imaging apparatus 1) main body.
- the control board mounted on the apparatus main body is electrically connected to each part of the X-ray imaging apparatus 1 as a control unit 28 as shown in FIG.
- the control unit 28 (see FIG. 2) is composed of a halogen lamp control board 80 having a function of a light source type discriminating unit, and functions as a light source lighting control unit and a lighting time limiting unit.
- a central processing unit (CPU) 81 having the above is mounted on a halogen lamp control board 80.
- the halogen lamp control board 80 is electrically connected only to the halogen lamp H as shown in FIG.
- the halogen lamp control board 80 is electrically connected to the halogen lamp H via the halogen lamp connector 82.
- the halogen lamp control board 80 is electrically connected to the lamp lighting switch S via the switch connector 84.
- the halogen lamp connector 82 and the switch connector 84 have two pins (connection terminals).
- the first pin (indicated by “1” in FIG. 5) and the second pin (indicated by “2” in FIG. 5) of the halogen lamp connector 82 are connected to the halogen lamp H.
- the halogen lamp control board 80 is electrically connected only to the halogen lamp H.
- the first pin is electrically connected to a 24V DC power source
- the second pin is electrically connected to the CPU 81 via a transistor. .
- the first pin (indicated by “1” in FIG. 5) and the second pin (indicated by “2” in FIG. 5) of the switch connector 84 are connected to the lamp lighting switch S, and are the same as in the first embodiment.
- the switch connector 84 By inserting the switch connector 84 into the halogen lamp control board 80, the first pin is electrically connected to a resistor connected to a 5V DC power supply and is electrically connected to the CPU 81. .
- the second pin is grounded.
- the fifth pin (indicated as “5” in FIG. 5) of the CPU 81 is electrically connected to a high resistance (for example, 10 k ⁇ ) connected to a DC power source of 5V.
- a high resistance for example, 10 k ⁇
- the fifth pin of the CPU 81 is pulled up to approximately 5V by the 5V DC power source to become High logic.
- a slight voltage drop is caused by the resistance connected to the DC power supply of 5 V.
- the resistance is a high resistance of, for example, about 10 k ⁇ , the current flowing through the resistance is microscopic. The voltage drop is negligible on the order of amperes ( ⁇ A).
- the CPU 81 when the CPU 81 is mounted on the halogen lamp control board 80, the CPU 81 is mounted on the halogen lamp control board 80 by detecting that the fifth pin of the CPU 81 becomes High logic. , And the type of the detected light source is automatically determined to be the halogen lamp H.
- the LED control board (LED lighting circuit) 90 will be described with reference to FIG.
- the control unit 28 (see FIG. 2) is composed of an LED control board 90 having a function of a light source type discriminating means, and has a function of a light source lighting control means and a function of a lighting time limiting means.
- a central processing unit (CPU) 91 is mounted on an LED control board 90.
- the LED control board 90 is electrically connected only to the light emitting diode (LED) L.
- the LED control board 90 is electrically connected to a light emitting diode (LED) L via an LED connector 93.
- the LED control board 90 is electrically connected to the lamp lighting switch S via the switch connector 94.
- the switch connector 94 has two pins (connection terminals).
- the LED connector 93 has two pins (connection terminals).
- the first pin (indicated by “1” in FIG. 6) and the second pin (indicated by “2” in FIG. 6) of the LED connector 93 are connected to a light emitting diode (LED) L.
- the LED control board 90 is electrically connected only to the light emitting diode (LED) L.
- the first pin is electrically connected to a 14V DC power source
- the second pin is electrically connected to the CPU 91 via a transistor.
- the 14V DC power source is electrically connected to an AC / DC conversion board (not shown), and after converting AC to a DC voltage of 14V, the light emitting diode (LED) L To supply power.
- the first pin (indicated by “1” in FIG. 6) and the second pin (indicated by “2” in FIG. 6) of the switch connector 94 are connected to the lamp lighting switch S.
- the first pin is electrically connected to a resistor connected to a DC power supply of 5V.
- the second pin is grounded.
- the fifth pin (indicated as “5” in FIG. 6) of the CPU 91 is grounded.
- the fifth pin of the CPU 91 is pulled down by the ground and becomes Low logic.
- the CPU 91 is mounted on the LED control board 90, it is detected that the CPU 91 is mounted on the LED control board 90 by detecting that the fifth pin of the CPU 91 becomes Low logic. Detection is performed to automatically determine that the type of the detected light source is a light emitting diode (LED) L.
- LED light emitting diode
- the CPUs are given different reference numerals (81, 91), but actually the same CPU is connected to the halogen lamp control board (halogen lamp lighting circuit) 80 shown in FIG. And the LED control board (LED lighting circuit) 90 shown in FIG. Therefore, in the halogen lamp control board 80 and the LED control board 90, by automatically reversing the logic of the same one pin of the CPU, it is possible to automatically detect which board the CPU is mounted on. Can do.
- control is performed by the control method 1 to the control method 4 described in the first embodiment.
- the light source type discriminating means is such that the light source lighting control means (CPU) uses the light source (the halogen lamp H or the light emitting diode (LED) L in FIGS. 5 and 6). It is detected that the light source is mounted on the control board dedicated to the light source (in FIG. 5 and FIG. 6, the halogen lamp control board 80 and the LED control board 90). ) Becomes High logic or Low logic).
- the light source lighting control means CPU
- Embodiment 3 of the present invention will be described with reference to the drawings.
- X-ray imaging is performed using the X-ray imaging apparatus 1 shown in FIG.
- the lighting time limit means (CPU) is disabled. Yes. This is the power consumption of the LED is about 10W to 20W, 1/10 to 1/5 of the power consumption of the halogen lamp, and the LED can be turned on indefinitely by disabling the lighting time limiting means (CPU) itself. It is because it is hard to overheat even if it makes it.
- the light source type discriminating means may be a control board as shown in FIG. 4 or a control board as shown in FIG. 5 or FIG.
- control is performed by the control method 1 to control method 4 described in the first embodiment. That is, in any of the control methods 1 to 4, when the light source is a semiconductor light source such as an LED, the lighting time limiting means (CPU) itself is invalidated.
- the light source is a semiconductor light source such as an LED
- the lighting time limiting means (CPU) itself is invalidated.
- control method 1 lighting was prohibited when the halogen lamp reached 600 counts, but the LED was turned on indefinitely by disabling it. Further, in the control method 2, the halogen lamp is continuously lighted for 5 minutes and then the temperature is limited. However, the LED is lighted indefinitely by being disabled.
- Control Method 3 the halogen lamp was lit continuously for 5 minutes and the temperature was limited until the device was restarted. However, the LED was turned on indefinitely by disabling it.
- the halogen lamp was limited to a temperature limit so that it would only light for 10 seconds by pressing the light button once for 10 minutes after 5 minutes of continuous lighting. Light up. Or, by disabling the LED, it is lit for 30 seconds as before the temperature limit when the lighting button is pressed once.
- visible light is applied to an irradiation field of radiation (X-rays in each embodiment).
- the light source that irradiates the light source
- the light source lighting control means that controls the lighting of the light source (collimator lamp 29)
- Lighting time limiting means for limiting the lighting time of the light source (collimator lamp 29) (incorporated in the CPU in each embodiment)
- light source type determining means for determining the type of light source connected to the apparatus body (in each embodiment) Control board).
- the light source is a semiconductor light source (for example, LED) based on the result of discrimination by discriminating the type of light source connected to the apparatus main body by the light source type discrimination means (control board).
- the light source lighting control means (CPU) invalidates the lighting time limiting means (incorporated in the CPU).
- the semiconductor light source is composed of a semiconductor light source that generates a small amount of heat, such as a laser diode (LD) that emits visible light (light) in phase and an LED as in each of the embodiments. Therefore, when a semiconductor light source with low heat generation is actually connected, the lighting time limit means (incorporated in the CPU) is disabled, so that the lighting time is set long and used continuously for a long time. . Conversely, when a light source of a large heat generation other than a semiconductor light source (for example, a halogen lamp) is actually connected, the lighting time is shortened by enabling the lighting time limiting means (built in the CPU). Limit to prevent overheating.
- a semiconductor light source that generates a small amount of heat
- LD laser diode
- LED visible light
- X-ray imaging is performed using the same X-ray imaging apparatus 1 shown in FIG. 1 as in the first to third embodiments described above.
- the lighting time limited by the lighting time limiting means (CPU in each of the first and second embodiments) based on the determination result by the light source type determining means (control board in the first and second embodiments).
- the lighting power limited by the lighting power limiting means (CPU) is changed based on the result of determination by the light source type determining means (control board).
- the limitation target is the lighting time of the light source in the first and second embodiments, whereas the lighting power of the light source is the fourth embodiment.
- the light source type discriminating means may be a control board as shown in FIG. 4 or a control board as shown in FIG. 5 or FIG.
- PWM Pulse ⁇ Width Modulation
- the ON (High) time is shortened stepwise or the OFF (Low) time is lengthened stepwise. Reduce the lighting power and limit it to prevent overheating.
- the LED is connected, for example, even after monitoring the lighting time with a timer, it is longer than that of the halogen lamp and the ON (High) time is shortened stepwise, or the halogen lamp
- the OFF (Low) time is set to be longer in steps, the reduction rate of the lighting power is set to be suppressed.
- the lighting power may be changed by changing the voltage (refer to the voltage of the DC power supply on the control board in FIGS. 4 to 6).
- the voltage is lowered stepwise to reduce and limit the lighting power to prevent overheating.
- the LED is connected, for example, even after monitoring the lighting time with a timer, the voltage is lowered stepwise in a longer time than in the case of a halogen lamp, or higher than in the case of a halogen lamp.
- a light source (collimator lamp in each embodiment) that irradiates visible light (light) to an irradiation field of radiation (X-rays in each embodiment).
- the lighting control means CPU in each embodiment
- the lighting power of the light source is limited to a predetermined temperature or lower.
- Lighting power limiting means (incorporated in the CPU in each embodiment) and light source type determining means (control board in each embodiment) for determining the type of light source connected to the apparatus main body.
- the temperature of the apparatus exterior is prevented from overheating.
- the lighting power limited by the lighting power limiting means (incorporated in the CPU) is turned on.
- the lighting power limited by the lighting power limiting means (incorporated in the CPU) is changed based on the result of determination by the light source type determining means (control board), the risk of erroneous setting can be prevented. For example, even if a light source of a large amount of heat (for example, a halogen lamp) is actually connected, the lighting power is automatically determined after the lighting time is monitored by, for example, a timer by automatically determining the type of the light source as a connection target. Lower to limit to prevent overheating.
- a light source of a large amount of heat for example, a halogen lamp
- a light source of a low heat generation type for example, LED
- it can be turned on even after monitoring the lighting time with a timer, for example, by automatically determining the type of the light source as the connection target.
- Set with a lower power reduction rate Therefore, use a light source with large heat generation to prevent overheating of the exterior temperature, and use a light source with low heat generation to turn on when there is no possibility of overheating of the exterior temperature. It is possible to set the power reduction rate while suppressing it. As a result, the risk of erroneous setting can be prevented, and the light source switching setting can be performed automatically.
- X-ray imaging is performed using the same X-ray imaging apparatus 1 shown in FIG. 1 as in the first to fourth embodiments described above.
- the lighting power limited by the lighting power limiting means (CPU) is changed based on the determination result by the light source type determining means (control board).
- the light source type determination is performed.
- the lighting power limiting means (CPU) is disabled.
- the power consumption of the LED is about 10W to 20W, 1/10 to 1/5 of the power consumption of the halogen lamp, and the lighting power limiting means (CPU) itself This is because even if the LED is turned on indefinitely by disabling the LED, it is difficult to overheat.
- the light source type discriminating means may be a control board as shown in FIG. 4 or a control board as shown in FIG. 5 or FIG.
- the lighting power limiting means (CPU) itself is disabled to maintain the same duty ratio as before the temperature limitation.
- the lighting power limiting means (CPU) is disabled, so that the lighting power is set larger than that in the PWM control without performing the PWM control.
- the lighting power limiting means (CPU) itself may be disabled from the beginning. By making the lighting power limiting means (CPU) itself invalid from the beginning, the PWM control is always performed with the same duty ratio, so that the lighting power is not lowered. Alternatively, by turning off the lighting power limiting means (CPU) from the beginning, the lighting power is set larger than that in the PWM control without performing the PWM control from the beginning.
- the lighting power is lowered and limited by, for example, decreasing the voltage stepwise after monitoring the lighting time with a timer. To prevent overheating.
- the PWM control is performed at the same voltage as before the temperature limit by disabling the lighting power limiting means (CPU) itself. By doing so, the lighting power is set without lowering.
- the visible light (light) is irradiated on the radiation field (X-rays in each embodiment) as in the fourth embodiment.
- the light source (collimator lamp 29 in each embodiment) and the light source lighting control means (CPU in each embodiment) that controls lighting of the light source (collimator lamp 29)
- the light source ( The lighting power limiting means for limiting the lighting power of the collimator lamp 29 (incorporated in the CPU in each embodiment) and the light source type determining means for determining the type of light source connected to the apparatus main body (control board in each embodiment) ).
- the temperature of the apparatus exterior is prevented from overheating.
- the light source is a semiconductor light source (for example, LED) based on the result of discrimination by discriminating the type of light source connected to the apparatus main body by the light source type discrimination means (control board).
- the light source lighting control means (CPU) disables the lighting power limiting means (incorporated in the CPU).
- the semiconductor light source is composed of a semiconductor light source that generates little heat, such as a laser diode (LD) or an LED as in each of the embodiments.
- the lighting power limiting means (incorporated in the CPU) is disabled, and the lighting power is set to be large or not set low.
- the lighting power is reduced by enabling the lighting power limiting means (built in the CPU).
- the lighting power limiting means (incorporated in the CPU) is disabled or set without decreasing the lighting power. It becomes possible to set. As a result, the risk of erroneous setting can be prevented, and the light source switching setting can be performed automatically.
- the present invention is not limited to the above embodiment, and can be modified as follows.
- X-rays are taken as an example for explanation.
- the present invention can be applied to radiations other than X-rays (for example, ⁇ rays, ⁇ rays, ⁇ rays, etc.).
- the X-ray imaging apparatus that performs X-ray imaging as the radiation apparatus has been described as an example.
- the present invention is not limited to the X-ray imaging apparatus that performs X-ray imaging.
- an X-ray fluoroscopy device that performs X-ray fluoroscopy in which X-rays are irradiated with X-rays at a dose lower than that of X-ray imaging to sequentially acquire a plurality of X-ray images and display each X-ray image in real time (moving image display) You may apply to.
- the X-ray imaging apparatus is an apparatus as shown in FIG. 1, but radiation irradiating means for irradiating radiation toward the subject (X-ray tube 22 in each embodiment).
- radiation irradiating means for irradiating radiation toward the subject May be a device that performs imaging and fluoroscopy only in a standing posture, or may be a device that performs radiography and fluoroscopy only in a standing posture. Further, it may be an apparatus that performs photographing and fluoroscopy, which includes a tiltable table to which both the standing posture and the lying posture are applicable.
- a flat panel X-ray detector has been described as an example of the X-ray detector.
- the X-ray detector is usually an X-ray detector such as an X-ray film or a CR. If it is used in, it will not specifically limit.
- a collimator lamp that illuminates the entire irradiation field adjusted by the leaf of the collimator with visible light is used as the light source, but if the light source emits visible light to the radiation field, It is not limited to a collimator lamp. You may use the line marker which irradiates the reference line (for example, centerline) in an irradiation field with visible light by irradiating with line-shaped visible light. Further, both a collimator lamp and a line marker may be used.
- a halogen lamp enclosing halogen gas is used as a light source that generates a large amount of heat, but an incandescent bulb enclosing gas other than halogen may be used.
- a light emitting diode (LED) is used as a semiconductor light source that generates little heat.
- a laser diode (LD) that emits visible light with uniform phase may be used.
- the central processing unit is exclusively used for the function of the light source lighting control means and incorporates the function of the lighting time / lighting power limiting means.
- the function of the light source lighting control means and the function of the lighting time / lighting power limiting means may be provided independently.
- the light source type discriminating means is a control board as shown in FIGS. 4 to 6, but is not limited to the control board.
- an optical sensor that optically detects the presence or absence of connection by a connector may be provided, the optical sensor and a CPU may be connected, and the light source type determination unit may be configured by the CPU.
- it has a current detection circuit that detects the presence or absence of current flowing in the cable connected to the light source connected to the main body of the device.
- the current detection circuit is connected to the CPU, and the CPU constitutes the light source type discrimination means. Also good. Specifically, as shown in FIG.
- a current detection circuit 75 that detects the presence or absence of current flowing through a cable connected to a light emitting diode (LED) L is provided, and a CPU 71 is connected via a current detection circuit connector 76.
- the current detection circuit 75 is electrically connected.
- the current detection circuit 75 detects that a current is flowing through the cable connected to the light emitting diode (LED) L, it detects that the light source connected to the apparatus body is the light emitting diode (LED) L.
- LED light emitting diode
- the current detection circuit 75 detects that no current is flowing through the cable connected to the light emitting diode (LED) L, it detects that the light source connected to the apparatus body is the halogen lamp H. Thus, it is automatically determined that the detected type of the light source is the halogen lamp H. In addition, you may provide the electric current detection circuit which detects the presence or absence of the electric current which flows into the cable connected to the halogen lamp.
- LED light emitting diode
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Abstract
Description
すなわち、この発明に係る放射線装置(「第1の発明」と呼ぶ)は、被検体に向けて放射線を照射する放射線照射手段を備えた放射線装置であって、放射線の照射野に可視光を照射する光源と、当該光源の点灯を制御する光源点灯制御手段と、所定の温度以下になるように前記光源の点灯時間を制限する点灯時間制限手段と、装置本体に接続された前記光源の種類を判別する光源種類判別手段とを備え、前記光源種類判別手段による判別の結果に基づいて、前記点灯時間制限手段が制限する点灯時間を前記光源点灯制御手段が変更することを特徴とするものである。
すなわち、光源種類判別手段は、光源が接続されたことを検出する。この一例の場合には、例えば制御基板を1つ用意して、装置本体に搭載された当該制御基板に光源を接続するだけで、光源の種類の判別を実現することができる。
すなわち、光源種類判別手段は、光源点灯制御手段が光源を点灯させるための当該光源専用の制御基板に搭載されたことを検出する。この一例の場合には、例えば光源の種類の数だけ光源専用の制御基板(光源専用の点灯用回路)を用意して、いずれか1つの制御基板を装置本体に搭載して、それぞれに同じ光源点灯制御手段(例えばCPU)を搭載するだけで、光源の種類の判別を実現することができる。
また、この発明に係る放射線装置(第2の発明・第4の発明)によれば、所定の温度以下になるように光源の点灯時間/点灯電力を制限する点灯時間/点灯電力制限手段と、装置本体に接続された光源の種類を判別する光源種類判別手段とを備え、光源種類判別手段による判別の結果により光源が半導体光源である場合に、点灯時間/点灯電力制限手段を光源点灯制御手段が無効にする。その結果、誤設定のリスクを防止し、光源の切り替え設定を自動的に行うことができる。
上述した特許文献1:特開2012-55421号公報のように、温度上昇や温度下降を疑似温度カウンターとしてカウントアップあるいはカウントダウンし、そのカウント値が設定値を超えるとコリメータランプの点灯を中止して、外装温度が高温になるのを防止していた。
ハロゲンランプを使用する場合には、例えば5分連続して点灯すると、その後に温度制限をかけて10分間点灯を禁止する。以下、本明細書では、この制御方式を「制御方式2」と呼ぶ。LEDを使用する場合には、制御方式2によって下記のように点灯時間制限手段が制限する点灯時間を変更する。
ハロゲンランプを使用する場合には、例えば5分連続して点灯すると、その後に温度制限をかけて装置を再起動するまでに点灯を禁止する。言い換えれば、5分連続点灯後に装置を再起動すれば温度制限のようなプロテクトが解除される。したがって、温度上昇の勾配が温度下降の勾配よりも2倍急峻である場合には、温度制限をかけた直後から10分以内に装置を再起動しないように技師などの使用者が留意する。以下、本明細書では、この制御方式を「制御方式3」と呼ぶ。LEDを使用する場合には、制御方式3によって下記のように点灯時間制限手段が制限する点灯時間を変更する。
ハロゲンランプを使用する場合には、点灯ボタン(図示省略)の1回押下で例えば30秒点灯し、10回押下することにより30秒/回×10回=300秒となり、5分(=300秒)連続して点灯する。その5分連続点灯後の10分間は点灯ボタンの1回押下で10秒しか点灯しないように温度制限をかける。以下、本明細書では、この制御方式を「制御方式4」と呼ぶ。LEDを使用する場合には、制御方式4によって下記のように点灯時間制限手段が制限する点灯時間を変更する。
22 … X線管
28 … 制御部
29 … 照射野ランプ(コリメータランプ)
70,80,90 … 制御基板
71,81,91 … 中央演算処理装置(CPU)
H … ハロゲンランプ
L … 発光ダイオード(LED)
M … 被検体
Claims (6)
- 被検体に向けて放射線を照射する放射線照射手段を備えた放射線装置であって、
放射線の照射野に可視光を照射する光源と、
当該光源の点灯を制御する光源点灯制御手段と、
所定の温度以下になるように前記光源の点灯時間を制限する点灯時間制限手段と、
装置本体に接続された前記光源の種類を判別する光源種類判別手段と
を備え、
前記光源種類判別手段による判別の結果に基づいて、前記点灯時間制限手段が制限する点灯時間を前記光源点灯制御手段が変更することを特徴とする放射線装置。 - 被検体に向けて放射線を照射する放射線照射手段を備えた放射線装置であって、
放射線の照射野に可視光を照射する光源と、
当該光源の点灯を制御する光源点灯制御手段と、
所定の温度以下になるように前記光源の点灯時間を制限する点灯時間制限手段と、
装置本体に接続された前記光源の種類を判別する光源種類判別手段と
を備え、
前記光源種類判別手段による判別の結果により前記光源が半導体光源である場合に、前記点灯時間制限手段を前記光源点灯制御手段が無効にすることを特徴とする放射線装置。 - 被検体に向けて放射線を照射する放射線照射手段を備えた放射線装置であって、
放射線の照射野に可視光を照射する光源と、
当該光源の点灯を制御する光源点灯制御手段と、
所定の温度以下になるように前記光源の点灯電力を制限する点灯電力制限手段と、
装置本体に接続された前記光源の種類を判別する光源種類判別手段と
を備え、
前記光源種類判別手段による判別の結果に基づいて、前記点灯電力制限手段が制限する点灯電力を前記光源点灯制御手段が変更することを特徴とする放射線装置。 - 被検体に向けて放射線を照射する放射線照射手段を備えた放射線装置であって、
放射線の照射野に可視光を照射する光源と、
当該光源の点灯を制御する光源点灯制御手段と、
所定の温度以下になるように前記光源の点灯電力を制限する点灯電力制限手段と、
装置本体に接続された前記光源の種類を判別する光源種類判別手段と
を備え、
前記光源種類判別手段による判別の結果により前記光源が半導体光源である場合に、前記点灯電力制限手段を前記光源点灯制御手段が無効にすることを特徴とする放射線装置。 - 請求項1から請求項4のいずれかに記載の放射線装置において、
前記光源種類判別手段は、前記光源が接続されたことを検出することを特徴とする放射線装置。 - 請求項1から請求項4のいずれかに記載の放射線装置において、
前記光源種類判別手段は、前記光源点灯制御手段が前記光源を点灯させるための当該光源専用の制御基板に搭載されたことを検出することを特徴とする放射線装置。
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| JP2017540424A JP6569736B2 (ja) | 2015-09-17 | 2015-09-17 | 放射線装置 |
| PCT/JP2015/076579 WO2017046929A1 (ja) | 2015-09-17 | 2015-09-17 | 放射線装置 |
| EP15904116.9A EP3351179A4 (en) | 2015-09-17 | 2015-09-17 | Radiography apparatus |
| US15/760,801 US10893841B2 (en) | 2015-09-17 | 2015-09-17 | Radiography apparatus |
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| US (1) | US10893841B2 (ja) |
| EP (1) | EP3351179A4 (ja) |
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| WO (1) | WO2017046929A1 (ja) |
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| EP3351179A1 (en) | 2018-07-25 |
| US20180249971A1 (en) | 2018-09-06 |
| EP3351179A4 (en) | 2018-08-29 |
| US10893841B2 (en) | 2021-01-19 |
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| JPWO2017046929A1 (ja) | 2018-06-07 |
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