JP2011062345A - Radiation detecting apparatus and radiographic system - Google Patents

Abstract

An X-ray detection range is accurately set.
An X-ray detector has a rectangular detection surface for detecting X-rays. On the left side of the detection surface 31, a switch row 32 is arranged along the detection surface 31 in parallel with the long side direction of the detection surface 31. The switch row 32 includes a plurality of push button switches 34. The push button switch 34 is turned on when pressed. When the two push button switches 34 are turned on, the height of one of the push button switches 34 turned on becomes one end in the long side direction of the detection range, and the height of the other push button switch 34 is detected. The other end in the long side direction of the range. A portion indicated by diagonal lines is a detection range.
[Selection] Figure 2

Description

  The present invention relates to a radiation detection apparatus that detects radiation applied to a subject and a radiation imaging system including the same.

  An X-ray imaging system comprising an X-ray generator that emits X-rays (radiation) toward a subject (subject) and an X-ray detector that detects X-rays transmitted through the subject is known. It has been. The X-ray imaging system is installed in an X-ray imaging room, and staff such as doctors and medical radiographers guide the subject to the imaging position, and then perform imaging operations outside the X-ray imaging room.

  Imaging plates (hereinafter referred to as IP) and flat panel detectors (hereinafter referred to as FPD) are used for X-ray detectors, and digitization of radiation images is progressing. . In addition, there is a large-sized long cassette that accommodates a plurality of IPs so that the entire spine and all lower limbs can be photographed at one time (see Non-Patent Document 1). As an alternative to long cassettes, larger FPDs are also expected.

"Long-size cassette", [online], FUJIFILM Corporation, [searched on September 1, 2009], Internet (URL: http://fujifilm.jp/business/medical/digital/fcr/ipc/lcassette/ index.html)

  Due to operational reasons of the X-ray imaging system, imaging may be performed using a part of a large X-ray detector. At that time, since the designation of the imaging range for the X-ray detector is performed by adjusting the X-ray irradiation field irradiated from the X-ray generator, X-ray detection is performed in order to obtain partial data of the X-ray detector. The data of the entire vessel must be acquired, and the amount of data becomes enormous, which is inconvenient for management. For this reason, it is desirable to keep the X-ray detection range to the minimum necessary and reduce the amount of data to be acquired.

Compared with the case where the X-ray detection range is set near the X-ray detector, as compared with the case where the X-ray detection range is set remotely from the X-ray generator side away from the X-ray detector or outside the X-ray imaging room, the X-ray detection range can be accurately performed it can. In addition, when performing standing-up imaging, it is necessary to set the X-ray detection range while the staff assists the subject standing near the X-ray detector. For this reason, it is more convenient to set the X-ray detection range on the X-ray detector side.

  The present invention has been made in view of the above problems, and an object of the present invention is to set an X-ray detection range with high accuracy in a radiation detection apparatus and a radiation detection system.

  In order to achieve the above object, a radiation detection apparatus of the present invention includes a radiation detector having a detection surface for detecting radiation within a set detection range, and a first detection range for setting a detection range in the first direction of the detection surface. One setting means and at least one setting means of a second setting means for setting a detection range in a second direction perpendicular to the first direction of the detection surface is provided.

  The setting unit is preferably a switch row in which a plurality of switches are arranged in parallel with one direction of the detection surface.

  The setting means is a linear potentiometer including two sliders that reciprocate in one direction of the detection surface. One slider sets one end of the detection range of the detection surface, and the other slider is the detection surface. It is preferable to set the other end of the detection range.

  The setting means is only one of the first setting means, and accepting means for receiving a value that is input from a user interface and sets a detection range in a second direction perpendicular to the first direction of the detection surface. It is preferable to provide.

  It is preferable that the setting means has a length substantially the same as a length in one direction of the detection surface.

  The setting means is preferably provided on both sides along one direction of the detection surface.

  It is preferable that the setting means is provided on the back side opposite to the detection surface of the radiation detector. Or it is preferable that the said setting means is provided in the side surface side of the said radiation detector.

  It is preferable that display means for displaying the detection range of the detection surface set by the setting means is provided.

  It is preferable that the display means is a light emitting part row in which a plurality of light emitting parts are arranged in parallel with one direction of the detection surface.

  In the first light emitting part row, it is preferable that light emitting parts corresponding to one end and the other end of the detection range emit light.

  In the light emitting section row, it is preferable that the light emitting sections arranged between the light emitting sections corresponding to one end and the other end of the detection range emit light.

  It is preferable that the detection surface is composed of a plurality of sensor units, and the switches constituting the switch row are evenly arranged at the same interval as the width of the sensor units. Moreover, it is preferable that the switch which comprises the said switch row | line | column is arranged on the boundary line of these sensor units.

  In the switch row, when two switches are turned on, one switch that is turned on sets one end in one direction of the detection range of the detection surface, and the other switch that is turned on detects the detection surface. It is preferable to set one end of the range.

  In the switch row, when four switches are turned on, the switch at one end turned on is one end in one direction of the detection range of the detection surface, and the switch at the other end turned on is the detection range of the detection surface. Set the other end in one direction, and set one end in one direction in which the remaining one switched on excludes detection, and one direction in the range in which the other switched on excludes detection It is preferable to set the other end of each.

  The switch constituting the switch row is preferably any one of a push button switch, an optical sensor switch, a magnetic sensor switch, a capacitance touch switch, and a pressure sensor switch.

  The setting unit includes a marker attached to the radiation detector or the subject and an imaging unit that images the marker, and preferably sets a detection range in one direction of the detection surface based on the captured marker. .

  The radiation imaging system of the present invention is configured to acquire the detection by acquiring the radiation detection device, a radiation generator for irradiating the radiation detection device, and a detection range of the detection surface set by the setting unit. And a controller for controlling the radiation generator so that the detection range of the surface is an irradiation range of radiation.

  It is preferable that the radiation detector obtains image data based on radiation detected in a detection range of the detection surface set by the setting unit.

  The controller is configured such that when one switch in the switch row is turned on and two or more continuous switches spaced apart from the switch are turned on, the radiation irradiation angle is set. It is preferable to control the radiation generator to tilt.

  Preferably, the controller initially sets a detection range of the detection surface based on an imaging condition, and the setting unit changes the initial setting range and sets the detection range of the detection surface.

  In addition to the setting means, it is preferable that an input means for inputting a signal for adjusting the detection range of the detection surface set by the setting means is provided.

  According to the present invention, since the setting means for setting the detection range of the detection surface is provided in the radiation detection apparatus, the detection range of the detection surface can be set beside the subject. For this reason, compared with the case where it sets remotely from the X-ray generator side away from an X-ray detector, or the X-ray imaging room, it can carry out with a sufficient precision.

1 is a schematic diagram showing an X-ray imaging system. It is a front view of an X-ray detection apparatus. It is a flowchart which shows the operation | movement procedure of an X-ray detector. It is a front view of the X-ray detector from which the display aspect of a detection range differs. It is a front view of the X-ray detector which can set the detection range of a long side direction and a short side direction. It is a front view of the X-ray detector which shows the detection range when four switches are turned ON for every switch row. It is a rear view of the X-ray detection apparatus provided with the switch row on the back side. FIG. 3 is a front view of an X-ray detector in which switch rows are provided on the top, bottom, left and right. FIG. 3 is a perspective view of an X-ray detector in which a switch row is composed of optical sensor switches. It is a perspective view of the X-ray detector by which the switch row | line | column was comprised with the magnetic sensor switch. It is a perspective view of the X-ray detector by which the switch row | line was comprised with the electrostatic capacitance touch switch. It is a perspective view of the X-ray detector by which the switch row | line | column was comprised with the pressure sensor switch. It is a perspective view of the X-ray detector provided with the linear potentiometer. It is a perspective view which shows the X-ray imaging system which image | photographs the marker attached to the subject and sets a detection range. It is a figure explaining that the irradiation angle of X-rays inclines when a continuous switch is turned on. It is a perspective view of the X-ray detection apparatus for supine photography.

[First Embodiment]
As shown in FIG. 1, an X-ray (radiation) imaging system 11 is for standing imaging including an imaging device 12, a moving device 13, and a control unit 14, and is installed in an X-ray imaging room of a hospital.

  The imaging device 12 includes an X-ray generator 15 and an X-ray detection device 16. The X-ray generator 15 includes an X-ray tube that emits X-rays, a light emitting unit that emits visible light, and an X-ray movable diaphragm (collimator) that limits the irradiation range of X-rays and visible light. The X-ray generator 15 irradiates visible light to an X-ray irradiation range before X-ray irradiation. Thereby, the irradiation range of X-rays can be confirmed.

  The X-ray detection apparatus 16 includes a stand 17 installed on the floor and a long X-ray detector 18 attached to the stand 17. As the X-ray detector 18, a well-known one such as an imaging plate or a flat panel detector is used. As will be described later, the X-ray detector 18 detects X-rays within a set detection range. Then, the X-ray generator 15 emits X-rays so that the detection range of the X-ray detector 18 becomes the irradiation range.

  The imaging device 12 captures an X-ray image by detecting the X-rays generated by the X-ray generator 15 by the X-ray detector 18. It is also possible to perform pre-imaging in which the amount of X-rays generated by the X-ray generator 15 is 1/10 that of normal imaging. The photographed X-ray image is output to a monitor or a data storage device (both not shown).

  The X-ray generator 15 is attached to the lower end of a column 20 that expands and contracts in the Z-axis direction via an arm 19 that can rotate a predetermined angle around the Z-axis (vertical axis) and the horizontal axis. The X-ray generator 15 can be moved to a desired position in the XY plane (horizontal plane) and the Z-axis direction by the arm 19 and the support column 20.

  The moving device 13 is for moving the X-ray generator 15 to a desired position in the XY plane and the Z-axis direction. The moving device 13 includes a pair of fixed rails 21 and a pair of movable rails 22, a pair of traveling units 23 and a carriage 24 connected to these, and the arm 19 and the support column 20 described above.

  The fixed rail 21 is fixed to the ceiling of the X-ray imaging room so that its longitudinal direction is along the Y axis. The fixed rail 21 is formed with a guide groove and has a substantially U-shaped cross section. Each fixed rail 21 is disposed so that the guide grooves face each other.

  The movable rail 22 is movably attached to the fixed rail 21 so that the longitudinal direction of the movable rail 22 is along the X axis by a traveling portion 23 fixed to both sides. Similar to the fixed rail 21, a guide groove is formed in the movable rail 22. Each movable rail 22 is disposed so that the guide grooves face each other.

  Each traveling unit 23 includes a rotatable roller (not shown), and the roller travels along the fixed rail 21 by rotating in the guide groove of the fixed rail 21. As the traveling unit 23 travels, the movable rail 22 moves in the Y-axis direction.

  The carriage 24 includes a carriage body 25 and a pair of travel units 26. The cart body 25 is movably attached to the movable rail 22 by the traveling unit 26. Each traveling unit 26 includes a rotatable roller (not shown), and the roller travels along the movable rail 22 by rotating in the guide groove of the movable rail 22. As the traveling unit 26 travels, the cart body 25 moves in the X-axis direction. The X-ray generator 15 is mounted on the carriage 24 by fixing the column 20 to the carriage body 25.

  The X-ray generator 15 is movably held on the movable rail 22 via the carriage 24 and moves in the X-axis direction as the carriage 24 moves. The X-ray generator 15 moves in the Y-axis direction by moving the movable rail 22, and moves in the Z-axis direction by extending / contracting the support column 20. Further, the irradiation angle of the X-ray generator 15 is changed by the rotation of the arm 19 around each axis.

  The X-ray generator 15 is provided with an operation unit 27. The operation unit 27 includes a handle for changing the posture and position of the X-ray generator 15 and an operation panel provided with various operation buttons. The X-ray generator 15 is rotated and moved manually by operating a handle.

  The operation panel is provided with operation buttons such as a brake release button. The brake stops the X-ray generator 15 at an arbitrary angle or restricts movement by the moving device 13. The brake is released while the brake release button is pressed. When the brake is released, the X-ray generator 15 is allowed to rotate and move.

  The control unit 14 includes a controller 28 and a terminal 29. The controller 28 is connected to each part of the X-ray imaging system 11 via an interface. The controller 28 comprehensively controls the entire X-ray imaging system 11 based on various signals from the imaging apparatus 12 and the terminal 29. When the detection range of the X-ray detector 18 is set, the set detection range is acquired, and the X-ray generator 15 is controlled so that the acquired detection range becomes the X-ray irradiation range.

  The terminal 29 is for operating the imaging apparatus 12 and is installed in an operating room adjacent to the X-ray imaging room. The X-ray imaging room and the operating room are partitioned by a lead-containing glass window, and the staff can operate the terminal 29 while listening to the state of the X-ray imaging room through the window.

  As shown in FIG. 2, the X-ray detector 18 has a rectangular detection surface 31 for detecting X-rays, and acquires image data based on X-rays detected in a set detection range. The detection surface 31 has an area enough to cover the substantially whole body of the subject. On the left side of the detection surface 31, a switch row 32 and a light emitting portion row 33 are arranged along the detection surface 31 in parallel with the long side direction of the detection surface 31.

  The switch row 32 has a configuration in which a plurality of push button switches 34 are arranged at equal intervals, and has substantially the same length as the long side direction of the detection surface 31. The push button switch 34 is turned on when pressed. When the push button switch 34 that has been turned on is pressed again, it is turned off. When the push button switch 34 is turned on, the detection range of the detection surface 31 is set.

  Specifically, when two push button switches 34 are turned on, the height of one of the push button switches 34 turned on becomes one end in the long side direction of the detection range, and the other push button switch 34 is turned on. Is the other end in the long side direction of the detection range. FIG. 2 shows a case where the sixth and eleventh push button switches 34 from the top are turned on, and the hatched portion is the detection range.

  Which two locations are turned on when two or more push button switches 34 are pressed can be appropriately set. For example, the push button switch 34 that is turned on is set to be sequentially switched. In this case, when the third push button switch 34 is pressed, the first pressed push button switch 34 is turned off, and instead, the third push button switch 34 is turned on. When the fourth push button switch 34 is pressed, the second push button switch 34 is turned off, and instead, the fourth push button switch 34 is turned on. When the fifth and subsequent buttons are pressed, the switching is performed in the same manner as when the third or fourth button is pressed.

  By using the terminal 29 or the like and changing the detection range setting method, the detection range can be set by turning on one push button switch 34. A width in the long side direction set in advance around the height of the push button switch 34 that is turned on becomes the detection range. For example, when a width corresponding to three push button switches 34 is set in advance in the vertical direction, when the tenth push button switch 34 is turned on, the seventh push button switch 34 from the top is turned on. The detection range is from the height of 34 to the height of the 13 pushbutton switches 34 from the top. Further, the entire range above or below the height of the pushed push button switch 34 may be set as the detection range. The push button switch 34 is preferably a membrane switch.

  The detection surface 31 that detects X-rays is configured by a plurality of sensor units that perform processing such as signal readout processing of a plurality of pixels. One sensor unit has a width of 10 mm to 50 mm. The pitch of the push button switches 34 is preferably arranged at the same interval as the width of one sensor unit. By doing so, the range designated by the push button switch 34 can be switched not in units of pixels but in units of sensor units, so that the readout control process can be simplified and the manufacturing cost can be reduced.

  Moreover, it is preferable that the push button switch 34 is each arrange | positioned on the boundary line of the some sensor unit arrange | positioned side by side. By doing so, the range specified by the push button switch 34 and the read range are exactly the same, which is convenient.

  The detection range of the detection surface 31 set by the switch row 32 can be changed by the terminal 29. As a result, the staff who has performed pre-imaging can adjust the detection range of the detection surface 31 by operating the terminal 29 in the operating room without moving to the X-ray imaging room. As described above, the terminal 29 functions as an input unit that adjusts the detection range of the detection surface 31 set by the switch row 32.

  The light emitting unit row 33 has a configuration in which a plurality of light emitting units 35 are arranged at equal intervals, and each light emitting unit 35 corresponds to the push button switch 34 on a one-to-one basis. The light emitting unit 35 emits light when the corresponding push button switch 34 is turned on, and displays the detection range of the detection surface 31. Further, the light emitting unit 35 stops light emission when the corresponding push button switch 34 is turned off from the on state. FIG. 2 shows a case where the sixth and eleventh push button switches 34 from the top are turned on, and the sixth and eleventh light emitting units 35 emit light from the top.

  Next, the operation of the X-ray detection device 16 will be described with reference to the flowchart of FIG. When the first push button switch 34 is turned on (step (hereinafter abbreviated as S) 11), the light emitting unit 35 corresponding to the pushed push button switch 34 emits light (S12). When the second push button switch 34 is turned on (S13), the light emitting unit 35 corresponding to the pushed push button switch 34 emits light (S14). Then, the heights of the two push button switches 34 that are turned on become both ends in the long side direction of the detection range, and the detection range is set (S15).

  As described above, since the X-ray detector 18 is provided with the switch row 32 for setting the detection range of the detection surface 31, the staff can set the detection range beside the subject. Thereby, it can carry out with high precision compared with the case where it sets remotely.

  The long side direction range of the detection surface 31 is set by the push button switch 34 as described above, but the short side direction range is equal to the short side width of the detection surface 31 or the short side width. It is preset as a smaller range. This value can be changed by a user interface such as the terminal 29. The set value in the short side direction is received by the X-ray detector 18 via the interface between the controller 28 and the X-ray detector 18. As described above, the interface between the controller 28 and the X-ray detector 18 functions as a receiving unit that receives a setting value in the short side direction. The X-ray generator 15 determines the irradiation range based on the range set by the push button switch 34 and the value in the short side direction set by the user interface.

  Alternatively, in the case of a system that uses the X-ray generator 15 in a fixed position without moving in the X-axis and Y-axis directions of FIG. 1, the irradiation range in the short side direction is set in advance so as not to exceed the width of the detection surface 31. The In this case, the X-ray generator 15 determines the irradiation range only by setting the range of the push button switch 34 in the long side direction.

  Although the case of the X-ray detection device 16 for standing imaging has been described as an example, the present invention can be applied to an apparatus for standing imaging. Further, the detection range of the detection surface 31 may be initially set based on a signal from the terminal 29 or a condition stored in the controller 28. In this case, the switch row 32 is used for changing the detection range.

  The case where the detection range in the long side direction of the detection surface 31 is set has been described as an example. However, the present invention is also applicable to the case where the detection range in the short side direction of the detection surface 31 is set. When the detection surface 31 is a square, one side is assumed to be a long side and the other side is assumed to be a short side, and the configuration is the same as in the above case.

[Second Embodiment]
In the present embodiment, the light emission mode of the light emitting unit 35 is different from that of the first embodiment. In addition, the structure employ | adopted in 1st Embodiment, 2nd Embodiment, and each embodiment shown below shall be applied mutually in the possible range.

  As shown in FIG. 4, the light emitting unit 35 emits light when the corresponding push button switch 34 is turned on, as in the first embodiment. In addition, when the two push button switches 34 are turned on, the light emitting units 35 arranged between the light emitting units 35 corresponding to the pushed push button switches 34 emit light. FIG. 2 shows a case where the sixth and eleventh push button switches 34 from the top are turned on, and the sixth and eleventh light emitting portions 35 from the top emit light, and between them. The seventh to tenth light emitting portions 35 from the top of the array emit light. In addition, the description about the structure and effect | action similar to 1st Embodiment is abbreviate | omitted. In the following embodiments, only differences from the other embodiments will be described.

[Third Embodiment]
The present embodiment is different from the first embodiment in that the detection range in the short side direction of the detection surface 31 can be set in addition to the point that the detection range in the long side direction of the detection surface 31 can be set.

  As shown in FIG. 5, on the left side of the detection surface 31, a first switch row 41 and a first light emitting unit row 42 are arranged along the detection surface 31 in parallel with the long side direction of the detection surface 31. Yes. The first switch row 41 has the same configuration as that of the switch row 32 of the first embodiment, and includes a plurality of push button switches 34. The first light emitting unit row 42 has the same configuration as the light emitting unit row 33 of the first embodiment, and includes a plurality of light emitting units 35.

  Above the detection surface 31, the second switch row 43 and the second light emitting unit row 44 are arranged along the detection surface 31 in parallel with the short side direction of the detection surface 31. Like the first switch row 41, the second switch row 43 has a configuration in which a plurality of push button switches 45 are arranged at equal intervals, and has substantially the same length as the short side direction of the detection surface 31. .

  When the two push button switches 45 are turned on, the position of the one push button switch 45 turned on becomes one end in the short side direction of the detection range, and the other push button switch 45 has the left and right direction. Is the other end in the short side direction of the detection range. FIG. 5 shows a case where the third and fifth push button switches 45 from the left are turned on, and the hatched portion is the detection range. The pitch of the push button switches 45 is preferably 10 mm to 50 mm, similar to the pitch of the push button switches 34.

  Similar to the first light emitting unit row 42, the second light emitting unit row 44 has a configuration in which a plurality of light emitting units 46 are arranged at equal intervals, and each light emitting unit 46 corresponds to the push button switch 45 on a one-to-one basis. The light emitting unit 46 emits light when the corresponding push button switch 45 is turned on. FIG. 5 shows a case where the third and fifth push button switches 45 from the left are turned on, and the third and fifth light emitting units 46 from the left emit light.

[Fourth Embodiment]
This embodiment is different from the third embodiment in that in addition to setting the detection range of the detection surface 31, a range that excludes detection is set. When the push button switch 34 is turned on, the detection range of the detection surface 31 is set and the range from which detection is excluded is set.

  Specifically, when the four push button switches 34 are turned on, the height of the push button switch 34 at one end turned on becomes one end in the long side direction of the detection range, and at the other end turned on. The height of the push button switch 34 is the other end in the long side direction of the detection range. Further, the height of the remaining one push button switch 34 that is turned on is one end in the long side direction of the range that excludes detection, and the height of the other push button switch 34 that is turned on excludes detection. It becomes the other end in the long side direction of the range.

  Similarly, when the four push button switches 45 are turned on, the left and right positions of the push button switch 45 at one end turned on become one end in the short side direction of the detection range, and at the other end turned on. The left-right position of the push button switch 45 is the other end in the short side direction of the detection range. Also, the left-right position of the remaining one push button switch 45 is one end in the short side direction of the range excluding detection, and the left-right position of the other push button switch 45 that is turned on Becomes the other end in the short side direction of the range excluding detection.

  FIG. 6 shows that the sixth, seventh, eighth, and eleventh push button switches 34 from the top are turned on, and the second, fourth, fifth, and seventh from the left. The case where the pushbutton switch 45 of the eye is turned on is shown, and a portion indicated by hatching is a detection range. And the place shown in the plain surrounded by the detection range becomes a range which excludes detection. The excluded range may be only one side in the long side direction or the short side direction.

  Further, the X-ray imaging system of the fourth embodiment differs from the third embodiment in that the light emission modes of the light emitting units 35 and 46 are different in order to identify the detection range and the range excluding detection.

  The light emitting unit 35 corresponding to the push button switch 34 that is turned on to set the detection range emits light in the first color (for example, green), and the push button switch that is turned on to set the range that excludes detection. The light emitting unit 35 corresponding to 34 emits light in the second color (for example, red). The light emitting unit 46 also emits light in the same manner as the light emitting unit 35.

  As described above, a range for excluding detection of X-rays is set by a simple operation of the first switch row 41 and the second switch row 43, and the X-rays generated by the X-ray generator 15 are set only in the detection range of the detection surface 31. Because it is irradiated, it is possible to easily avoid exposure to places (genital organs, eyes, etc.) where it is desired to avoid exposure. In this case, the X-ray generator 15 divides the detection range and irradiates X-rays, or filters the range excluded from X-ray detection and irradiates X-rays. If the set detection range has a shape that cannot be created by the collimator, a warning is given or shooting cannot be performed.

[Fifth Embodiment]
This embodiment is different from the third embodiment in the arrangement of the first switch row 41, the first light emitting portion row 42, the second switch row 43, and the second light emitting portion row 44.

  As shown in FIG. 7, the first switch row 41 and the second switch row 43 are arranged on the back surface 51 side opposite to the detection surface 31 of the X-ray detector 18. Thereby, the 2nd switch row | line | column 43 can be arrange | positioned in the height which is convenient. The first switch row 41 and the second switch row 43 may be disposed on the side surface 52 of the X-ray detector 18. Further, when a partition is provided between the X-ray detector 18 and the subject, the partition first switch row 41 and the second switch row 43 may be provided. Furthermore, when applied to the lying position photographing, it may be provided on a bed on which the subject is laid down. In these cases, the screen and the bed are included in the X-ray detection device 16.

  The first light emitting unit row 42 and the second light emitting unit row 44 are provided so as to protrude from the side surface 52 of the X-ray detector 18. Thereby, a detection range can be confirmed from the detection surface 31 side and the back surface 51 side. Note that the first light emitting unit row 42 and the second light emitting unit row 44 may be disposed on the back surface 51 side of the X-ray detector 18. Moreover, like the 1st switch row | line | column 41 and the 2nd switch row | line | column 43, you may arrange | position in a screen or a bed.

[Sixth Embodiment]
The present invention is preferably applied to a large X-ray detector, but the same effect can be obtained even when applied to a non-large X-ray detector. Therefore, this embodiment is different from the third embodiment in that an X-ray detector having a shorter length in the long side direction than the X-ray detector 18 is provided instead of the X-ray detector 18. . Further, the first switch row and the first light emitting portion row are arranged on both sides of the detection surface, and the second switch row and the second light emitting portion row are arranged on both sides above and below the detection surface. This is different from the third embodiment.

  As shown in FIG. 8, the detection surface 57 of the X-ray detector 56 has an area that covers the chest of the subject. On the left and right sides of the detection surface 57, a first switch row 58 and a first light emitting unit row 59 are arranged along the detection surface 57 in parallel with the long side direction of the detection surface 57.

  The first switch row 58 differs from the first switch row 41 of the third embodiment in that both the left and right are interlocked, but the other points are the same as the first switch row 41. The first switch row 58 is turned on when one of the left and right push button switches 34 is pressed. For example, when the third push button switch 34 from the top is turned on, the third push button switch 34 is pushed from the top of either the left or right first switch row 58.

  The first light emitting unit row 59 is different from the first light emitting unit row 42 of the third embodiment in that both the left and right are interlocked, but the other points are the same as the first light emitting unit row 42.

  A second switch row 60 and a second light emitting unit row 61 are arranged along the detection surface 57 in parallel with the short side direction of the detection surface 57 above and below the detection surface 57, respectively.

  The second switch row 60 is different from the second switch row 43 of the third embodiment in that both the upper and lower sides are interlocked, but the other points are the same as the second switch row 43. The second switch row 60 is turned on when one of the upper and lower push button switches 45 is pressed. For example, when the third push button switch 45 from the left is turned on, the third push button switch 45 from the left in either the upper or lower second switch row 60 is pressed.

  The second light emitting unit row 61 is different from the second light emitting unit row 44 of the third embodiment in that both the upper and lower sides are interlocked, but the other points are the same as the second light emitting unit row 44.

[Seventh Embodiment]
This embodiment is different from the first embodiment in that an optical sensor switch is provided instead of the push button switch 34.

  As shown in FIG. 9, the switch row 66 arranged on the left side of the detection surface 31 has a configuration in which a plurality of optical sensor switches 67 are arranged at equal intervals. Each optical sensor switch 67 includes a light projecting element and a light receiving element (both not shown), and is turned on when light from the light projecting element is detected by the light receiving element.

  Two U-shaped sliders 68 (only one slider 68 is shown in FIG. 9) at the edge along the switch row 66 of the X-ray detector 18 so as to cover the optical sensor switch 67. It is attached. The slider 68 has a claw 70 that fits into a groove 69 formed along the switch row 66, and slides along the switch row 66.

  On the inner surface of the slider 68 facing the optical sensor switch 67, a mirror surface (not shown) is provided. This mirror surface reflects the light from the light projecting element toward the light receiving element. For this reason, the optical sensor switch 67 covered with the slider 68 is turned on. The photosensor switch 67 that is turned on is turned off when exposed by the movement of the slider 68.

  In addition, although the case of the reflector type light receiving sensor that reflects light from the light projecting element and detects the light by the light receiving element has been described as an example, the present invention is not limited to this. For example, one of the light projecting element and the light receiving element may be provided on the optical sensor switch side, and the other may be provided on the slider side.

  Alternatively, the light sensor switch may be provided with only a light receiving element that detects natural light without providing a light projecting element. In this case, each optical sensor switch is turned on without detecting natural light by being covered by the slider.

[Eighth Embodiment]
This embodiment is different from the first embodiment in that a magnetic sensor switch is provided instead of the push button switch 34.

  As shown in FIG. 10, the switch row 76 arranged on the left side of the detection surface 31 has a configuration in which a plurality of magnetic sensor switches 77 are arranged at equal intervals. Each magnetic sensor switch 77 is provided in a recess 78 recessed from the outer peripheral surface of the X-ray detector 18 and is turned on by detecting the magnetism of the magnet 79 inserted into the recess 78. The magnetic sensor switch 77 that is turned on is turned off when the magnet 79 is removed from the recess 78.

[Ninth Embodiment]
This embodiment is different from the first embodiment in that a capacitive touch switch is provided instead of the push button switch 34.

  As shown in FIG. 11, the switch row 81 arranged on the left side of the detection surface 31 has a configuration in which a plurality of capacitance switches 82 are arranged at equal intervals. Each capacitance touch switch 82 incorporates an electrode sheet, and is turned on by detecting a change in capacitance that occurs when the staff touches with a finger. When the capacitive touch switch 82 that has been turned on is touched again with a finger, it is turned off.

[Tenth embodiment]
This embodiment differs from the seventh embodiment in that a pressure sensor switch is provided instead of the optical sensor switch 67.

  As shown in FIG. 12, the switch row 86 arranged on the left side of the detection surface 31 has a configuration in which a plurality of pressure sensor switches 87 are arranged at equal intervals. Each pressure sensor switch 87 incorporates a ceramic diaphragm. The pressure sensor switch 87 is turned on when the capacitance changes due to elastic deformation of the diaphragm due to pressurization, and this change is detected.

  Further, instead of the slider 68 provided with the mirror surface of the seventh embodiment, a slider 88 provided with a projection (not shown) is attached. The protrusion is provided on the inner surface facing the pressure sensor switch 87 and pressurizes the pressure sensor switch 87 at the facing position. For this reason, the pressure sensor switch 87 covered with the slider 88 is turned on. The pressure sensor switch 87 that is turned on is turned off when the pressure is released by the movement of the slider 88.

[Eleventh embodiment]
This embodiment is different from the first embodiment in that a linear potentiometer is provided instead of the switch row 32.

  As shown in FIG. 13, a linear potentiometer 91 is arranged on the left side of the detection surface 31 along the detection surface 31 in parallel with the long side direction of the detection surface 31. The linear potentiometer 91 includes a variable resistor (not shown) built in the X-ray detector 18 and two sliders 93 connected to the variable resistor via a groove 92.

  The slider 93 is slid along the groove 92. The resistance value of the variable resistor is changed by the sliding movement of the slider 93. The potentiometer 91 detects the position of the slider 93 based on the resistance value of the variable resistor. Then, the detection range of the detection surface 31 is set according to the detected position of the slider 93.

  Specifically, the position of one slider 93 becomes one end in the long side direction of the detection range, and the position of the other slider 93 becomes the other end in the long side direction of the detection range.

[Twelfth embodiment]
In this embodiment, instead of setting the detection range of the detection surface 31 with the push button switch 34 of the switch row 32, the detection range of the detection surface 31 is set by detecting a marker attached to the subject. Thus, it is different from the first embodiment.

  As shown in FIG. 14, the arm 19 is attached with the X-ray generator 15 and a camera 98 for photographing the marker 97 attached to the subject. The detection range of the detection surface 31 is set at the position of the marker 97 photographed by the camera 98.

  Specifically, when a plurality of markers 97 are photographed, the height of the uppermost marker 97 is one end in the long side direction of the detection range, and the height of the lowermost marker 97 is the detection range. The other end in the long side direction. The position of the leftmost marker 97 is one end in the short side direction of the detection range, and the position of the leftmost marker 97 is the other end in the short side direction of the detection range. In FIG. 14, the hatched portion is the detection range. Even when the marker 97 is attached to the X-ray detector 18 instead of the subject, the detection range is set according to the position of the marker 97.

  The camera 98 simultaneously images other markers, for example, the X-ray detector 18 itself or other markers attached to the X-ray detector 18 together with the marker 97, and detects it from the relative positional relationship between the marker 97 and the marker. The detection range of the surface 31 is calculated and set.

[Thirteenth embodiment]
This embodiment is different from the first embodiment in that the X-ray irradiation angle by the X-ray generator 15 is set by the switch row 32.

  In the switch row 32, one push button switch 34 is turned on, and two or more continuous push button switches 34 spaced apart from the push button switch 34 are turned on separately from the pushed push button switch 34. In this case, the X-ray irradiation angle by the X-ray generator 15 is set to an inclined angle.

  As shown in FIG. 15A, one push button switch 34 is turned on, and one push button switch 34 spaced apart from the push button switch 34 apart from the pushed push button switch 34. Is turned on, the X-ray irradiation angle of the X-ray generator 15 is set to an angle orthogonal to the detection surface 31.

  As shown in FIG. 15 (B), one push button switch 34 is turned on, and in addition to the pushed push button switch 34, the push button switch 34 is separated from the push button switch 34 and is continuous at two places. When 34 is turned on, the X-ray irradiation angle by the X-ray generator 15 is set to an angle inclined by α from the angle orthogonal to the detection surface 31.

  As shown in FIG. 15 (C), one push button switch 34 is turned on, and in addition to the turned on push button switch 34, three push button switches that are spaced apart from the push button switch 34 are continuous. When 34 is turned on, the X-ray irradiation angle by the X-ray generator 15 is set to an angle inclined by 2α from the angle orthogonal to the detection surface 31.

  Thus, every time the number of push button switches 34 that are continuously turned on increases, the inclination of the X-ray irradiation angle by the X-ray generator 15 is set to be large.

  FIGS. 15B and 15C show a case where the push button switch 34 for setting the lower end of the detection range is continuously turned on at two or more locations. In this case, the X-ray irradiation angle is upward. Set to tilt. On the other hand, when two or more push button switches 34 for setting the upper end of the detection range are continuously turned on (not shown), the X-ray irradiation angle is set to be inclined downward. Whether the tilting direction is upward or downward is a matter selected as appropriate, and is not limited to the above.

  When the X-ray irradiation angle becomes oblique, the range in which the subject is exposed to radiation increases. Therefore, in the X-ray imaging system of the thirteenth embodiment, the light emission mode of the light emitting unit 35 is different from that of the first embodiment in order to display not only the detection range but also the range where the subject is exposed.

  The light emitting unit 35 corresponding to the push button switch 34 that is turned on to set the detection range emits light in the first color (for example, green), and the light emitting units 35 positioned at both ends of the range where the subject is exposed are exposed. , Emits light in a second color (for example, yellow).

  In the case of an X-ray imaging system that sets the detection range in the short side direction of the detection surfaces 31 and 57 as in the third to sixth embodiments, the X-ray irradiation angle is set in the same manner as in the vertical direction. You may make it set with the pushbutton switch 45 so that it may incline in the left-right direction.

[Fourteenth embodiment]
This embodiment is different from the first embodiment in that it is an X-ray detection apparatus for standing position imaging instead of the X-ray detection apparatus 16 for standing position imaging.

  As shown in FIG. 16, the X-ray detection apparatus 101 includes a bed 103 having a top plate 102 and a human-shaped X-ray detector 104 disposed under the top plate 102. The subject can be placed on the top board 102 by aligning the position of the head of the subject without depending on the height of the subject. The X-ray detector 104 has a human shape and does not have an area where the subject's body is not arranged. By doing so, the expensive X-ray detector 104 can be made smaller, leading to cost reduction.

  The top plate 102 has a human-shaped mark 105 corresponding to the X-ray detector 104 on the upper surface thereof. The mark 105 is represented by adding a color, adding a dent, or clearly indicating an area with a line. Although the X-ray detector 104 cannot be seen from the top plate 102, the mark 105 prevents an image from being taken at a place that is mistakenly removed from the X-ray detector 104.

  The switch row 32 is disposed on the side surface of the top plate 102, and the light emitting unit row 33 is disposed on the top surface of the top plate 102.

  In all the embodiments, the irradiation field may be displayed with a collimator before imaging so that the X-ray irradiation range can be confirmed with respect to the set detection range. Because the subject's body is thick, there may be a slight difference between the range set by the X-ray detector 16 and the range irradiated on the subject's body surface. Useful.

11 X-ray imaging system 15 X-ray generator 16, 101 X-ray detector 18, 56, 104 X-ray detector 28 Controller 29 Terminal 31, 57 Detection surface 32, 66, 76, 81, 86 Switch array 33 Light emitting section array 34 push button switch 35 light emitting portion 41, 58 first switch row 42, 59 first light emitting portion row 43, 60 second switch row 44, 61 second light emitting portion row 45 push button switch 46 light emitting portion 51 back 67 optical sensor switch 77 Magnetic sensor switch 82 Capacitive touch switch 87 Pressure sensor switch 91 Linear potentiometer 93 Slider 97 Marker 98 Camera

Claims (23)

A radiation detector having a detection surface for detecting radiation within a set detection range;
At least one of first setting means for setting a detection range in the first direction of the detection surface and second setting means for setting a detection range in the second direction perpendicular to the first direction of the detection surface. A radiation detection apparatus comprising: setting means.   The radiation detection apparatus according to claim 2, wherein the setting unit is a switch row in which a plurality of switches are arranged in parallel with one direction of the detection surface.   The setting means is a linear potentiometer including two sliders that reciprocate in one direction of the detection surface. One slider sets one end of the detection range of the detection surface, and the other slider is the detection surface. The radiation detection apparatus according to claim 1, wherein the other end of the detection range is set. The setting means is only one of the first setting means,
4. The apparatus according to claim 1, further comprising: a receiving unit configured to receive a value that is input from a user interface and sets a detection range in a second direction perpendicular to the first direction of the detection surface. The radiation detection apparatus described.   The radiation detection apparatus according to claim 1, wherein the setting unit has a length substantially the same as a length in one direction of the detection surface.   The radiation detecting apparatus according to claim 1, wherein the setting unit is provided on both sides along one direction of the detection surface.   The radiation detection apparatus according to claim 1, wherein the setting unit is provided on a back side opposite to the detection surface of the radiation detector.   The radiation detection apparatus according to claim 1, wherein the setting unit is provided on a side surface side of the radiation detector.   The radiation detection apparatus according to claim 1, further comprising display means for displaying a detection range of the detection surface set by the setting means.   The radiation detection apparatus according to claim 9, wherein the display unit is a light emitting unit row in which a plurality of light emitting units are arranged in parallel with one direction of the detection surface.   The radiation detection apparatus according to claim 10, wherein in the light emitting unit row, light emitting units corresponding to one end and the other end of the detection range emit light.   The radiation detector according to claim 11, wherein the light emitting unit array emits light emitted from light emitting units arranged between the light emitting units corresponding to one end and the other end of the detection range. The detection surface comprises a plurality of sensor units,
The radiation detection apparatus according to claim 2, wherein the switches constituting the switch row are evenly arranged at the same interval as the width of the sensor unit. The detection surface comprises a plurality of sensor units,
The radiation detection apparatus according to claim 2, wherein the switches constituting the switch row are arranged on a boundary line of the plurality of sensor units.   In the switch row, when two switches are turned on, one switch that is turned on sets one end in one direction of the detection range of the detection surface, and the other switch that is turned on detects the detection surface. The radiation detection apparatus according to claim 2, wherein the other end in one direction of the range is set.   In the switch row, when four switches are turned on, the switch at one end turned on is one end in one direction of the detection range of the detection surface, and the switch at the other end turned on is the detection range of the detection surface. Set the other end in one direction, and set one end in one direction in which the remaining one switched on excludes detection, and one direction in the range in which the other switched on excludes detection The radiation detection apparatus according to claim 2, wherein the other end of each is set.   The radiation detection apparatus according to claim 2, wherein the switch constituting the switch row is any one of a push button switch, an optical sensor switch, a magnetic sensor switch, a capacitance touch switch, and a pressure sensor switch. .   The setting unit includes a marker attached to the radiation detector or the subject and an imaging unit that images the marker, and sets a detection range in one direction of the detection surface based on the captured marker. The radiation detection apparatus according to claim 1. The radiation detection apparatus according to claim 2;
A radiation generator for irradiating the radiation detector with radiation;
A controller that acquires the detection range of the detection surface set by the setting unit and controls the radiation generator so that the acquired detection range of the detection surface becomes an irradiation range of radiation. Radiation imaging system.   The radiation imaging system according to claim 19, wherein the radiation detector acquires image data based on radiation detected in a detection range of the detection surface set by the setting unit.   The controller is configured such that when one switch in the switch row is turned on and two or more continuous switches spaced apart from the switch are turned on, the radiation irradiation angle is set. 21. The radiographic system according to claim 19 or 20, wherein the radiation generator is controlled to tilt. The controller initializes the detection range of the detection surface based on imaging conditions,
The radiographic system according to any one of claims 19 to 21, wherein the setting means sets a detection range of the detection surface by changing an initial setting range.   23. The radiographic imaging according to claim 19, further comprising an input unit that inputs a signal for adjusting a detection range of the detection surface set by the setting unit, separately from the setting unit. system.

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