JP2009000210A - Medical image diagnostic apparatus and x-ray ct apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical image diagnostic apparatus and an X-ray CT apparatus capable of adjusting the height of a table part even when an object to match the height of an object mounting surface in the table part is at a position away from the table part. <P>SOLUTION: The X-ray CT apparatus 1 includes a table device 200 provided with the table part 201 for mounting an object and an elevating and lowering part 202 for the table part 201. The table part 201 is provided with a laser beam irradiation part 205 as a light source for emitting a visible light beam in an outer side horizontal direction to the object to match the height of the object mounting surface 204a in the table 201. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a medical image diagnostic apparatus and an X-ray CT apparatus, and more particularly to a medical image diagnostic apparatus and an X-ray CT apparatus having a table device including a table unit on which a subject is placed and a lifting unit of the table unit.

  A medical image diagnostic apparatus such as an X-ray CT (Computerized Tomography) apparatus or an MRI (Magnetic Resonance Imaging) apparatus, for example, as disclosed in Patent Document 1, includes a table section on which a subject is placed, and this table section. An object to be inspected is provided with a lifting device for raising and lowering, and a subject to be inspected is transported to an imaging space formed in a gantry while being laid on the top plate of the table portion and subjected to the inspection.

  In general, the subject is often not a healthy person and may not be able to walk on his own. In this case, the subject is moved to the examination room where the medical image diagnostic apparatus is installed by moving it on the subject carrier (hereinafter referred to as a stretcher), and the subject lying on the stretcher table is placed on the table device. It will change.

  When the subject is placed on the table device, the stretcher brought into the examination room is first placed on the table device. In order to make it easier to place the subject, the subject placement surface of the top plate of the table unit and the subject placement surface of the stretcher are made substantially the same height. Thereafter, the subject is transferred from the stretcher to the table device.

When the imaging is completed, the subject on the table device is again placed on the stretcher. At this time, the table unit is in a state matched to the height of the gantry in order to transport the subject to the imaging space during imaging, and has a height different from the height of the subject placement surface of the stretcher. It has become. Therefore, when the subject on the table device is to be placed on the stretcher, the stretcher is placed on the table device, and the subject placement surface of the top plate of the table unit is placed on the subject placement surface of the stretcher. The height is adjusted again to match the height.
JP 2003-52689 A

  As described above, the stretcher is placed on the table device when the subject placement surface of the top plate is substantially flush with the subject placement surface of the stretcher before and after photographing. . For this reason, when the table portion is raised or lowered, if the stretcher is too close to the table device, the table portion steps on the stretcher, or conversely the table portion lifts the stretcher, etc. There exists a possibility that the said table part may contact with the said stretcher.

  The present invention has been made in view of such circumstances, and the problem to be solved is that the object to be adjusted in height of the object placement surface in the table portion is located at a position away from the table portion. Another object of the present invention is to provide a medical image diagnostic apparatus and an X-ray CT apparatus capable of adjusting the height of the table section.

  The present invention has been made to solve the above-mentioned problems. The invention according to the first aspect provides a medical image including a table device on which a subject is placed, and a table device having a lift unit of the table portion. In the diagnostic apparatus, the table unit is provided with a light source for irradiating visible light rays in the outer horizontal direction toward a target whose height of the object placement surface in the table unit is to be matched.

  According to a second aspect of the present invention, in the medical image diagnostic apparatus according to the first aspect of the invention, the height detection unit for detecting the height of the table unit, and the height of the subject placement surface in the table unit are provided. A storage unit that stores the height of the table unit detected by the height detection unit when matched with the target as a specific height position, and the lifting unit is stored in the storage unit The table portion is moved to a specific height position.

  According to a third aspect of the invention, in the medical image diagnostic apparatus according to the first or second aspect of the invention, the object includes a subject placement unit and a leg portion that supports the subject placement unit. It is the subject mounting portion in the subject transporter.

  According to a fourth aspect of the present invention, in the medical image diagnostic apparatus according to the third aspect of the invention, the specific height position of the table unit stored in the storage unit is determined based on the table device and the subject carrier. The subject placement surface of the table unit is set to a height position slightly above or slightly below the subject placement surface in the subject transporter within a range in which the subject can be easily placed between Features.

  According to a fifth aspect of the present invention, in the medical image diagnostic apparatus according to any one of the first to fourth aspects, the table unit mounts the subject and conveys the subject to the imaging space. And a base that supports the top plate, and the light source is provided on at least one of the top plate or the base.

  According to a sixth aspect of the invention, in the medical image diagnostic apparatus according to any one of the first to fifth aspects, the light source is a semiconductor laser.

  The invention of the seventh aspect includes a table unit on which a subject is placed and a table device having an elevation part of the table unit, and an imaging space into which the subject placed on the table device is carried, An X-ray CT apparatus having a gantry for detecting X-rays transmitted through a specimen, wherein the table section is visible in an outer horizontal direction toward an object whose height of a subject placement surface in the table section is adjusted. A light source for irradiating a light beam is provided.

  According to an eighth aspect of the present invention, in the X-ray CT apparatus according to the seventh aspect of the invention, the height detection unit for detecting the height of the table unit, and the height of the subject placement surface in the table unit are determined. A storage unit that stores the height of the table unit detected by the height detection unit when matched with the target as a specific height position, and the lifting unit is stored in the storage unit The table portion is moved to a specific height position.

  According to the first and seventh aspects of the invention, when the height of the subject placement surface of the table unit is adjusted to the object, the table unit is raised or lowered by the elevating unit, and the outer side from the light source The object is irradiated with visible light in the horizontal direction, and the height of the table unit is adjusted using the irradiated visible light as a mark. Thereby, even if the object is at a position away from the table device, the height of the table part can be adjusted, and the table part can be prevented from coming into contact with the object.

  According to the second and eighth aspects of the invention, when the height of the subject placement surface in the table unit is adjusted to the object, the specific height position stored in the storage unit, that is, the table unit Since the elevating part moves the table part to the height position of the table part when the height of the object placement surface in the object is adjusted to the object, the object is at a position away from the table device. However, the height of the table portion can be adjusted. Therefore, it can prevent that the said table part contacts the said object. In addition, the height of the table portion can be adjusted without irradiating the object with visible light from the light source, and automatic height adjustment can be performed.

  According to the invention of the third aspect, the subject transporter is at a position away from the table device by irradiating the subject mounting portion of the subject transporter with visible light from the light source. In addition, the height of the table portion can be adjusted.

  According to the fourth aspect of the invention, the subject placement surface of the table portion is within a range in which the subject can be easily placed between the table device and the subject transporter. Since the elevating unit moves the table unit so that it is slightly above or slightly below the sample placement surface, the sample is transferred from the table device to the sample carrier or the sample carrier It is possible to move the subject to the subject transporter or the table device at a lower position when the subject is transferred from the table to the table device, thereby reducing the burden on the operator. Can do.

  According to the fifth aspect of the invention, the height of the table portion can be adjusted by irradiating visible light in the outer horizontal direction from a light source provided on at least one of the top plate or the base.

  According to the sixth aspect of the invention, by using a semiconductor laser as the light source, visible light can reach a certain distance from the table portion where the light source is provided, and the object is the table. Even when away from the apparatus, the height of the table portion can be adjusted. Further, in the case of laser light, since the diffusion of light is small, the height can be easily adjusted using such visible light as a mark.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overview of an X-ray CT apparatus according to an embodiment of the present invention.

The X-ray CT apparatus 1 shown in FIG. 1 includes a gantry 100, a table apparatus 200, and an operation console 300.
The gantry 100 includes a donut-shaped rotating body 102 having a cavity 101 that is a photographing space. In the rotating body 102, an X-ray tube, which is an X-ray generation source, and an X-ray detection unit, which will be described later, that detect X-rays generated from the X-ray tube sandwich the cavity 101. They are housed in opposing positions. The X-ray tube and the X-ray detection unit rotate around the cavity 101 while maintaining the mutual positional relationship. Therefore, by driving the X-ray tube and detecting the X-ray detector while rotating the rotating body 102 with the subject positioned in the cavity 101, the projection angle can be different from each other. X-ray irradiation and detection of X-rays transmitted through the subject can be performed.

  Further, the gantry 100 is provided with an operation panel 103, and a slide operation of a table unit 201 (to be described later) and an elevation operation of the table unit 201 in the table device 200 can be performed using the operation panel 103. It can be done. Although not shown in detail in the operation panel 103, a slide operation button, an up button, and a down button of the table device 200 are provided. The operation panel 103 also includes a home button for moving the table unit 201 to the lowest position or a specific height position stored in the storage unit 113 as described later, A storage button for storing the height position of the table unit 201 in the storage unit 113 is provided (detailed illustration is omitted respectively). Further, the operation panel 103 is provided with an examination end button that is pressed after the subject is transferred from the table apparatus 200 to the stretcher after the end of imaging (also not shown in detail).

  The table apparatus 200 includes a flat plate-like table unit 201 on which a subject is placed, and an elevating unit 202 that elevates and lowers the table unit 201. The table unit 201 includes a base 203 supported by the elevating unit 202 and a top plate 204 supported by the base 203. The top surface of the top plate 204 is a subject placement surface 204a.

  The side outer surface 203a of the base 203 is irradiated with a laser beam composed of a semiconductor laser element as a light source for irradiating a visible light beam in the outer horizontal direction toward a target whose height of the subject mounting surface 204a is to be adjusted. A unit 205 is provided. The laser beam irradiation unit 205 irradiates a target with the height of the object placement surface 204a with visible light (laser beam) serving as a mark. By using a semiconductor laser element as a light source, the laser beam can reach a location far away from the table device 200 to some extent, and an object whose height of the object placement surface 204a is to be separated from the table device 200. The height can be adjusted even if it is. In addition, since laser light has little diffusion of light, the height can be easily adjusted using such visible light as a mark.

  The object on which the height of the subject placement surface 204a is adjusted is a flat subject placement portion 402 supported by a leg 401 in a stretcher 400 (subject carrier) shown in FIG. More specifically, the subject on which the height of the subject placement surface 204 a is adjusted is the subject placement surface 402 a of the subject placement portion 402 in the stretcher 400. The height of the table unit 201 is adjusted by irradiating the side surface of the subject mounting unit 402 with the laser beam from the laser beam irradiation unit 205.

  Here, the height adjustment of the table unit 201 is performed in order to make it easier to replace the subject between the table apparatus 200 and the stretcher 400. Therefore, to adjust the height of the subject placement surface 204a of the top plate 204 to the height of the subject placement surface 402a of the stretcher 400, the height of the subject placement surfaces 204a and 402a is made equal. It is not strictly matching. That is, in addition to the case where the object placement surfaces 204a and 402a are made to have the same height, the object is placed between the table device 200 and the stretcher 400 even if the heights of both are different. Positioning the subject placement surfaces 204a and 402a within an easy range is also included. In the present embodiment, the laser beam irradiation unit 205 is provided below the subject placement surface 204 a, and the laser light from such a position is a side surface of the subject placement unit 402 of the stretcher 400. The subject placement surfaces 204a and 402a do not necessarily have the same height when irradiated. However, the laser beam irradiation unit 205 is provided on the side outer surface 203a of the base 203 that supports the top plate 204 in the plate-like table unit 201 as described above, and this position (ie, When the subject placement portion 402 of the stretcher 400 is irradiated with laser light from the subject placement surface 204a), the subject is placed between the table device 200 and the stretcher 400. The subject placement surfaces 204a and 402a are positioned within an easy range.

  On the side outer surface 203a of the base 203, a switch for turning on / off the laser beam irradiation unit 205 is provided in the vicinity of the laser beam irradiation unit 205 (not shown).

  In the table unit 201, the subject can be transported into the cavity 101 of the gantry 100 by sliding the top plate 204. Since the top plate 204 is conveyed to the cavity 101 of the gantry 100, a material having a high X-ray transmittance, for example, a foam material such as acrylic wrapped with CFRP (Carbon Fiber Reinforced Plastics) or the like is reinforced. used.

  The operation console 300 has a function of communicating with the gantry 100, a function of receiving projection data transferred from the gantry 100, and reconstructing an X-ray tomogram.

FIG. 2 is a block diagram showing a detailed configuration of the X-ray CT apparatus according to the present embodiment shown in FIG.
The elevating unit 202 of the table apparatus 200 includes an elevating motor 206, and the table unit 201 is raised or lowered by driving the elevating motor 206. The driving of the lifting motor 206 is controlled by a lifting motor controller 207. Reference numeral 208 denotes a rotary encoder for detecting the amount of rotation of the lifting motor 206. By detecting the amount of rotation of the lifting motor 206 by the rotary encoder 208, the height of the table portion 201 can be detected. That is, the rotary encoder 208 constitutes a height detection unit that detects the height of the table unit 201. Reference numeral 209 denotes an interface for communicating with the gantry 100.

  Although not shown in FIG. 2, the table device 200 includes a circuit for supplying power to the laser light irradiation unit 205, a circuit for turning on / off the laser light, and the like.

  Incidentally, the table device 200 includes a motor for sliding the top plate 204 (not shown), and the top plate 204 is transported to the cavity 101 of the gantry 100 by driving the motor. It is like that.

The gantry 100 includes a main controller 104 that performs overall control, and the following configuration.
Reference numeral 105 a denotes an interface for communicating with the table device 200, and reference numeral 105 b denotes an interface for communicating with the operation console 300. Reference numeral 102 denotes the above-described rotating body. Inside the rotating body 102, an X-ray tube 107 driven and controlled by an X-ray tube controller 106 and an X-ray irradiation range from the X-ray tube 107 are provided. A collimator 108 having a slit for confirmation is provided.

  In the rotating body 102, an X-ray detection unit 109 that detects X-rays transmitted through the subject, and data collection that collects projection data obtained from the transmitted X-rays detected by the X-ray detection unit 109 The part 110 is accommodated.

  The rotating body 102 is rotated by a rotating motor 112 driven by a driving signal from a motor controller 111. Then, due to the rotation of the rotating body 102, the X-ray tube 107, the collimator 108, and the X-ray detection unit 109 are opposite to each other with the cavity 101 interposed therebetween in the rotating body 102, that is, It rotates around the cavity 101 in a state where the positional relationship facing each other with the subject interposed therebetween is maintained.

  Reference numeral 113 denotes a storage unit. When the storage button of the operation panel 103 is pressed, the height position of the table unit 201 sent from the rotary encoder 208 of the table device 200 is stored in the storage unit 113. It is stored via the main controller 104. More specifically, the main controller 104 monitors the output of the rotary encoder 208 and sets the height position of the table unit 201 when the storage button is pressed as a specific height position. To come to remember.

  In the home button of the operation panel 103, when the home button is pressed and a specific height position is stored in the storage unit 113, the elevating unit 202 moves to the height position. When the table unit 201 is moved and a specific height position is not stored in the storage unit 113, the elevating unit 202 moves the table unit 201 to the lowest position.

  When the inspection end button on the operation panel 103 is pressed, the specific height position of the table unit 201 stored in the storage unit is deleted, and the lifting unit 202 moves the table unit 201 to the lowest position. To move to.

  The main controller 104 outputs a control signal to the motor controller 111, whereby the drive of the rotary motor 112 is controlled. Further, the main controller 114 outputs a control signal to the lifting motor controller 207 of the table device 200, whereby the driving of the lifting motor 206 is controlled. In addition, the main controller 104 outputs various control signals to the X-ray tube controller 106 and the data acquisition unit 110.

  The operation console 300 is connected to the gantry 100 via the interface 105b. Although not shown, an input device that receives an input from an operator, a central processing unit that executes image reconstruction processing, and the like, and the gantry A display device that displays a CT image reconstructed from projection data collected by 100 data collection units 110 and a storage device that stores programs, data, and X-ray CT images are provided.

  The inspection using the X-ray CT apparatus 1 of the present embodiment configured as described above is performed as follows. That is, first, the stretcher 400 carries the subject to the examination room where the X-ray CT apparatus 1 is installed. Next, the subject on the subject placement unit 402 of the stretcher 400 is placed on the table unit 201 of the table apparatus 200. Prior to the start of the examination, the table unit 201 of the table apparatus 200 is at the lowest position. Therefore, by adjusting the height of the table unit 201, the subject placement surface 204a of the top plate 204 is adjusted. Is adjusted to the height of the subject placement surface 402a of the stretcher 400.

  More specifically, FIG. 3 shows the height of the table unit 201 in the table apparatus 200 so that the subject can be easily placed between the table apparatus 200 and the stretcher 400 in the X-ray CT apparatus 1 shown in FIG. It is explanatory drawing when adjusting, First, the stretcher 400 is put in the position away from the said table apparatus 200 in the range which the laser beam irradiated from the said laser beam irradiation part 205 reaches. Next, in a state where the laser beam is irradiated from the laser beam irradiation unit 205 in the outer horizontal direction, the lifting unit 202 is moved up by operating the ascending button on the operation panel 103 of the gantry 100. . Then, when the laser beam from the laser beam irradiation unit 205 is irradiated onto the side surface of the plate-like subject placement unit 402 in the stretcher 400, the elevation of the table unit 201 is stopped. As a result, the height of the subject placement surface 204a of the top plate 204 matches the height of the subject placement surface 402a of the stretcher 400.

  When the object placement surfaces 204a and 402a are aligned with each other, the operator presses the storage button on the operation panel 103. Thereby, the height position of the table unit 201 when the subject placement surfaces 204a and 402a are matched with each other is stored in the storage unit 113 as a specific height position.

  After aligning the heights of the object placement surfaces 204a and 402a as described above, the stretcher 400 is placed on the table device 200, and the object is moved from the stretcher 400 to the table unit 201. In order to perform imaging, the top plate 204 is slid to convey the subject to the cavity 101 of the gantry 100.

  Here, the height of the gantry 100 and the height of the stretcher 400 are often different. In this case, the table unit 201 is raised or lowered by the elevating unit 202 so that the top plate 204 enters the cavity of the gantry 100, and then the top plate 204 is slid to perform photographing. Incidentally, the irradiation from the laser beam irradiation unit 205 is stopped before photographing.

  When the imaging is completed, the subject on the table unit 201 is again placed on the stretcher 400. At this time, it is necessary to adjust the height of the subject placement surface 204a of the top plate 204 to the height of the subject placement surface 402a of the stretcher 400 before performing the replacement. For this reason, the operator presses the home button on the operation panel 103. Accordingly, the elevating unit 202 raises or lowers the table unit 201 so that the table unit 201 is at the height position stored in the storage unit 113. Specifically, when the home button is pressed, the main controller 104 outputs a control signal to the lifting motor controller 207 so that the table unit 201 is at the height position stored in the storage unit 113. The lifting motor 206 is controlled. As a result, the height of the subject placement surface 204 a of the top plate 204 matches the height of the subject placement surface 402 a of the stretcher 400. As described above, when the height of the table unit 201 is stored in the storage unit 113, the height of the table unit 201 can be automatically adjusted.

  Incidentally, the height position of the top plate 204 when the heights of the subject placement surfaces 204a and 402a are matched does not necessarily have to be stored in the storage unit 113. In this case, the height adjustment of the table unit 201 when the subject is replaced after completion of imaging is manually performed. That is, in a state where the laser beam is irradiated from the laser beam irradiation unit 205, the table unit 201 is lifted or lowered by the lifting unit 202 by operating the ascending button or the descending button of the operation panel 103. In the same manner, the laser beam irradiation unit 205 again irradiates the subject placement unit 402 of the stretcher 400 with the laser beam, and the heights of the subject placement surfaces 204a and 402a are matched.

  After aligning the heights of the subject placement surfaces 204a and 402a as described above, the stretcher 400 is placed on the table device 200, and the subject on the table device 200 is placed on the stretcher 400. When the subject is placed on the stretcher 400, the operator presses the examination end button on the operation panel 103. When the inspection end button is pressed, the height position stored in the storage unit 113 is deleted, and the lifting unit 202 lowers the table unit 201 and returns the table unit 201 to the lowest position.

  According to the X-ray CT apparatus 1 of the present embodiment described above, the subject placement unit 402 of the stretcher 400 is not irradiated with the stretcher 400 from the laser light irradiation unit 205 without being placed on the table device 200. By irradiating visible light, the height of the subject placement surface 204a of the table unit 201 can be adjusted to the height of the subject placement surface 402 of the stretcher 400 using the visible light as a mark. Therefore, even if the stretcher 400 is located away from the table device 200, the height of the table unit 201 can be adjusted, thereby preventing the table device 200 and the stretcher 400 from contacting each other. be able to.

  Further, when the subject on the table device 200 is placed on the stretcher 400 again after the imaging is completed, the lifting motor 206 moves the table unit 201 to the height position stored in the storage unit 113. Even if the stretcher 400 is located away from the table device 200, the height can be adjusted. Thereby, it can prevent that the said table apparatus 200 and the said stretcher 400 contact. Further, the height of the table unit 201 can be adjusted without irradiating the subject mounting unit 402 with visible light from the laser beam irradiation unit 205, and automatic height adjustment can be performed. it can.

  Next, a first modification of the present embodiment will be described. In this first modified example, when the inspection end button on the operation panel 103 is pressed, the elevation unit 202 is not erased without erasing the specific height position of the table unit 201 stored in the storage unit 113. However, the table unit 201 may be returned to the lowest position. In this manner, when a new examination is performed, when the subject is transferred from the stretcher 400 to the table apparatus 200 before imaging, the elevator unit 202 is pressed by pressing the home button of the operation panel 103. However, the table unit 201 has a specific height position stored in the storage unit 113, that is, the height of the subject placement surface 204a of the top plate 204 and the height of the subject placement surface 402a of the stretcher 400. Move to the position where the Thereby, when examining a new subject, not only the height adjustment of the table unit 201 after the completion of imaging but also the height adjustment of the table unit 201 before imaging can be automatically performed.

  Next, a second modification of the present embodiment will be described. In this second modified example, before imaging, the subject mounting portion 402 is irradiated with laser light from the laser light irradiating portion 205 so that the height of the subject placing surface 204a of the table portion 201 is increased. When the height position of the table unit 201 is stored in the storage unit 113 in accordance with the height of the subject placement surface 402a of the stretcher 400, a position slightly higher than the actual height of the table unit 201 is set. It may be memorized.

  The position to be stored at this time is such that the height of the subject placement surface 204a of the top plate 204 is within the range in which the subject can be easily placed on the stretcher 400 from the table device 200. This is a position slightly above 402a. When the home button on the operation panel 103 is pressed after the photographing is finished, the lifting / lowering unit 202 moves the table unit 201 to a position stored in the storage unit 113. Accordingly, the height of the subject placement surface 204a of the top plate 204 is slightly higher than the subject placement surface 402a of the stretcher 400 within a range in which the subject can be easily placed on the stretcher 400 from the table apparatus 200. It will be in the upper position. Therefore, when the subject placement surface 402a of the stretcher 400 is positioned lower than the subject placement surface 204a of the top plate 204, and the subject is placed on the stretcher 400 from the table device 200, Since the subject is moved to a lower position, the burden on the operator can be further reduced.

  Incidentally, also in this second modified example, the height of the object placement surfaces 204a and 402a is manually adjusted using the laser beam from the laser beam irradiation unit 205 as a mark, and the table unit is stored in the storage unit 113. When the height of 201 is stored, the actual height of the table unit 201 may be stored. In this case, when the home button of the operation panel 103 is pressed after the imaging is finished, the subject on the top plate 204 is within a range in which the subject can be easily placed between the table device 200 and the stretcher 400. The height position of the table unit 201 stored in the storage unit 113 is changed and stored at a position where the mounting surface 204a is slightly above the subject mounting surface 402a of the stretcher 400, The lifting / lowering unit 202 moves the table unit 201 to the newly stored position.

  Next, a third modification of the present embodiment will be described. In this third modification, the height of the subject placement surface 204a of the top plate 204 is set to the height of the stretcher 400 when the subject is placed on the stretcher 400 from the table device 200. The height is slightly higher than the height of the subject placement surface 402a. In addition, when the subject is placed on the table apparatus 200 from the stretcher 400, the subject placement surface 204a of the top plate 204 is set to the height of the subject placement surface of the stretcher 400. It is slightly lower than the height of 402a. In either case, however, the subject placement surfaces 204a and 402a are positioned within a range where the subject can be easily placed between the table apparatus 200 and the stretcher 400.

  This third modification will be described in a little more detail. In this third modified example, before imaging, the subject mounting unit 402 is irradiated with laser light from the laser beam irradiation unit 205, and the height of the subject mounting surface 204a of the table unit 201 is set to the height. When the height position of the table unit 201 is stored in the storage unit 113 in accordance with the height of the subject placement surface 402a of the stretcher 400, the position slightly higher than the actual height of the table unit 201 and slightly higher Remember both low positions.

  The position to be stored at this time is such that the height of the subject placement surface 204a of the top plate 204 is within a range in which the subject can be easily placed between the table device 200 and the stretcher 400. The position is slightly above and slightly below the placement surface 402a.

  In the third modified example, a photographing end alignment button and a photographing start alignment button (each not shown) are provided on the operation panel 103. When the height of the subject placement surface 204a of the top plate 204 and the subject placement surface 402a of the stretcher 400 are adjusted after the end of imaging, the storage unit is pressed by pressing the alignment button at the end of imaging. 113 of the table 204 so that the subject placement surface 204 a of the top plate 204 is slightly above the subject placement surface 402 a of the stretcher 400 among the positions stored in 113. 201 is moved.

  In addition, after the height position of the table unit 201 is stored in the storage unit 113, when the subject is transferred from the stretcher 400 to the table device 200 before the start of imaging, the alignment at the start of imaging is performed. When the button is pressed, the elevating unit 202 moves the table unit 201 so that the subject placement surface 204a of the top plate 204 is positioned slightly below the subject placement surface 402a of the stretcher 400. Try to move it.

  According to the third modified example as described above, in both cases of changing the subject from the table device 200 to the stretcher 400 and changing the subject from the stretcher 400 to the table device 200. Since the subject is moved to a lower position, the burden on the operator can be further reduced.

  Incidentally, in the third modification, the position stored in the storage unit 113 may be a position slightly above or slightly below the subject placement surface 402a of the stretcher 400. In this case, when the table unit 201 is moved to a position not stored in the storage unit 113, the height is adjusted using the laser light emitted from the laser light irradiation unit 205 as a mark.

  As mentioned above, although this invention was demonstrated by the said embodiment, of course, this invention can be variously implemented in the range which does not change the main point. For example, the present invention is not limited to an X-ray CT apparatus, and can be applied to general medical image diagnostic apparatuses such as an MRI apparatus.

  The light source provided in the table unit 201 may be provided not on the base 203 but on the side of the top plate 204. Further, the light source is not limited to the laser light irradiation unit 205 as long as the light source reaches a certain distance from the table device 201 and can irradiate visible light that does not diffuse.

  Furthermore, the elevating part 202 of the table device 200 may be constituted by a parallel link mechanism that operates by hydraulic pressure. In this case, the height detection unit that detects the height of the table unit 201 is configured, for example, by detecting the rotation angle of the parallel link mechanism.

1 is an overview of an X-ray CT apparatus according to an embodiment of the present invention. It is a block diagram which shows the detailed structure of the X-ray CT apparatus concerning this embodiment shown in FIG. It is explanatory drawing when adjusting the height of the table part in the said table apparatus so that a subject can be easily replaced between the table apparatus and stretcher in the X-ray CT apparatus shown in FIG.

Explanation of symbols

1 X-ray CT system 100 Gantry 101 Cavity (imaging space)
DESCRIPTION OF SYMBOLS 113 Memory | storage part 200 Table apparatus 201 Table part 202 Elevating part 203 Base 204 Top plate 205 Laser beam irradiation part (light source)
208 Rotary encoder (height detector)

Claims (8)

A medical image diagnostic apparatus comprising a table device having a table portion on which a subject is placed and a lifting portion of the table portion,
A medical image diagnostic apparatus characterized in that a light source for irradiating visible light rays in an outer horizontal direction toward an object whose height of a subject placement surface in the table portion is to be adjusted is provided on the table portion. A height detection unit for detecting the height of the table unit;
A storage unit that stores, as a specific height position, the height of the table unit detected by the height detection unit when the height of the subject placement surface in the table unit matches the target. ,
The medical image diagnosis apparatus according to claim 1, wherein the elevating unit moves the table unit to a specific height position stored in the storage unit. 3. The object mounting part according to claim 1, wherein the object is the object mounting part in the object transporter including the object mounting part and a leg part that supports the object mounting part. Medical image diagnostic equipment.   The object mounting surface of the table unit is within a range in which the object can be easily placed between the table device and the object transporter at a specific height position of the table unit stored in the storage unit. The medical image diagnostic apparatus according to claim 3, wherein the medical image diagnostic apparatus is set to a height position slightly above or slightly below a subject placement surface in the subject transporter. The table unit includes a top plate on which the subject is placed and transports the subject to the imaging space, and a base that supports the top plate, and the light source is at least one of the top plate or the base The medical image diagnostic apparatus according to claim 1, wherein the medical image diagnostic apparatus is provided.   The medical image diagnostic apparatus according to any one of claims 1, 2, 3, 4 and 5, wherein the light source is a semiconductor laser. A table device having a table portion on which the subject is placed and a lifting / lowering portion of the table portion, and an imaging space in which the subject placed on the table device is carried in, detect X-rays transmitted through the subject An X-ray CT apparatus equipped with a gantry for performing
An X-ray CT apparatus, wherein a light source for irradiating visible light rays in the outer horizontal direction toward a target whose height of the object placement surface in the table portion is to be adjusted is provided on the table portion. A height detection unit for detecting the height of the table unit;
A storage unit that stores, as a specific height position, the height of the table unit detected by the height detection unit when the height of the subject placement surface in the table unit matches the target. ,
The X-ray CT apparatus according to claim 7, wherein the elevating unit moves the table unit to a specific height position stored in the storage unit.

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