JP2015100623A - X-ray machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray machine which can easily obtain accurate image data of long-length radiography and reduce a burden on a subject.SOLUTION: An image receiving part 13 is intermittently slid to a plurality of predetermined positions along a longitudinal direction X of a top plate 11 and a plurality of pieces of image data imaged at respective positions are automatically synthesized to obtain image data of long-length radiography. Thereby, accurate image data of long-length radiography can be obtained since imaging is performed by accurately sliding the image receiving part 13 to the plurality of positions. Also, a burden on a subject H can be reduced since the time for imaging is shortened.

Description

  The present invention relates to an X-ray imaging apparatus that performs imaging by irradiating X-rays from an X-ray irradiation unit to a subject in a supine position.

  Among X-ray imaging devices used in the medical field and the like, there are an X-ray imaging apparatus that shoots a subject in a supine position (while lying on the imaging table) and an X-ray imaging apparatus that stands in a standing position. is there. An X-ray imaging apparatus that images a subject in a supine position may be used when imaging a serious patient who cannot stand, so that not only accurate image data can be obtained, It is desirable that the configuration can reduce the burden on the subject.

  Conventionally, X-ray imaging using a silver salt film has been widely used as an X-ray imaging apparatus, but in recent years, a digital X-ray imaging apparatus that can output an X-ray image as image data has been used. (See, for example, Patent Document 1 below). In this type of X-ray imaging apparatus, for example, an FPD (Flat Panel Detector) including a semiconductor element is provided, and image data is obtained by detecting X-rays from the X-ray irradiation unit with the FPD. It is like that.

Japanese Patent No. 3908711

  For example, when photographing a wide range of subjects (so-called long photographing), such as whole spine photographing and whole leg photographing of a subject, use a long film in X-ray photographing using a silver salt film. Thus, it is possible to perform long imaging with one X-ray irradiation. Even in a digital X-ray imaging apparatus, if a large FPD equivalent to a long film is used, it is possible to perform long imaging with one X-ray irradiation, but the FPD is very expensive. It is currently impossible to use a large FPD that can perform long imaging with a single X-ray irradiation. Even if such a large FPD can be used, the cost becomes a problem and the introduction of the apparatus is limited to a large-scale hospital, resulting in medical inequalities.

  If the FPD is configured to be movable in the horizontal plane (XY direction) as in Patent Document 1, it is possible to image a wide range of the subject by appropriately moving the FPD and performing imaging. . However, since it is not easy to accurately combine a plurality of photographed image data, there is a possibility that accurate image data for long photographing cannot be obtained. Also, in order to obtain accurate image data for long shooting, if an operator tries to take an image after accurately adjusting the position of the FPD, it takes time for the imaging, which is a burden on the subject. There's a problem.

  The present invention has been made in view of the above circumstances, and provides an X-ray imaging apparatus that can easily obtain accurate image data for long imaging and can reduce the burden on the subject. The purpose is to do.

  An X-ray imaging apparatus according to the present invention is an X-ray imaging apparatus that performs imaging by irradiating X-rays from a X-ray irradiation unit to a subject in a prone position, and has a long shape and a longitudinal A top plate for placing the subject along the direction, an image receiving unit provided below the top plate, for taking an image by receiving X-rays from the X-ray irradiation unit, and the image receiving unit A drive mechanism that slides along the longitudinal direction of the top plate, and an automatic that intermittently slides the image receiving unit to a plurality of predetermined positions along the longitudinal direction of the top plate by controlling the drive mechanism A slide processing unit and an image processing unit that synthesizes image data photographed at the plurality of positions are provided.

  According to such a configuration, the image receiving unit is intermittently slid to a plurality of predetermined positions along the longitudinal direction of the top plate, and a plurality of image data photographed at each position is automatically synthesized. It is possible to obtain image data for long shooting. Therefore, since the image receiving unit can be accurately slid to a plurality of positions to perform shooting, accurate image data of long shooting can be easily obtained.

  In addition, it is possible to obtain long image data automatically by simply sliding the image receiving unit to a plurality of predetermined positions and shooting at each position, thereby reducing the time required for shooting. can do. Therefore, the burden on the subject can be reduced compared to a configuration in which the operator performs imaging after accurately adjusting the position of the image receiving unit.

  The X-ray imaging apparatus controls the drive mechanism based on an operation by an operator to manually slide the image receiving unit to an arbitrary position within a movable range along the longitudinal direction of the top plate. A part may be further provided.

  According to such a configuration, it is possible not only to obtain image data for long shooting by automatically combining image data shot at a plurality of positions, but also for the operator to arbitrarily set the image receiving unit along the longitudinal direction of the top plate. Image data at an arbitrary position can be obtained by sliding to a position and shooting at that position. Therefore, if necessary, only necessary portions can be imaged and image data can be obtained, so that the burden on the subject can be further reduced.

  The X-ray imaging apparatus serves as a mark when the image processing unit synthesizes image data by being positioned on the image receiving unit when the automatic slide processing unit slides the image receiving unit to perform imaging. A marker and a marker displacement mechanism for retracting the marker from the image receiving unit may be further provided.

  According to such a configuration, it is possible to obtain accurate image data of long shooting by synthesizing image data using a marker as a mark. In particular, except when the image receiving unit is automatically slid to perform shooting, the marker is retracted from the image receiving unit to prevent the marker from being inadvertently reflected. Therefore, imaging can be performed more favorably, and image data that is convenient for diagnosis without a missing portion can be obtained.

  The drive mechanism may include a ball screw including a screw shaft, a nut, and a ball. In this case, it is preferable that the nut is made of resin, and the image receiving portion slides as the screw shaft extending along the longitudinal direction of the top plate rotates with respect to the nut.

  According to such a structure, an image receiving part can be slid using a ball screw. Since the ball screw has high movement accuracy and few errors, the image data captured at each position is synthesized by sliding the image receiving unit to multiple positions using the ball screw, and accurate image data for long shooting Can be obtained. In particular, since the nut is made of resin, the sound and vibration during operation are small, so the burden on the subject can be reduced.

  The X-ray imaging apparatus may further include a top plate holding mechanism that holds the top plate in a slidable state at least in a direction crossing the longitudinal direction.

  According to such a configuration, the subject on the top can be aligned with the image receiving unit by sliding the top in the direction intersecting the longitudinal direction. Thereby, when aligning the imaging position with respect to the subject, it is not necessary for the subject to move on the top board, so that the burden on the subject can be reduced.

  The image receiving unit may include an X-ray detector and a detector holding mechanism that holds the X-ray detector in a state in which the X-ray detector is slidable in a direction intersecting the longitudinal direction of the top plate. In this case, the detector holding mechanism is configured so that the X-ray detector can be slid out of the range in which the top plate can be slid by the top plate holding mechanism and taken out from the detector holding mechanism. It is preferable.

  According to such a configuration, even when the top plate is slid in a direction crossing the longitudinal direction, the X-ray detector is slid to the outside of the range in which the top plate is slidable. It can be taken out. Therefore, it is not necessary to return the top plate to the original position in order to take out the X-ray detector, and the work efficiency is good, so that the burden on the subject can be reduced.

  The X-ray imaging apparatus has an urging member for urging the top plate toward a reference position, and the top plate crosses the reference position in the longitudinal direction against the urging force of the urging member. The top plate may be locked while being slid in the direction to be moved, and may further include a lock mechanism that unlocks the top plate based on an operation by an operator.

  According to such a configuration, the top plate is slid in a direction crossing the longitudinal direction from the reference position, and after shooting with the top plate locked, the biasing member is attached by releasing the lock. The top plate can be returned to the reference position side by the force. Therefore, when moving the X-ray imaging apparatus, the top plate is easily returned to the reference position side, and then the X-ray imaging apparatus is moved, so that other members protrude beyond the top plate. It is possible to prevent the X-ray imaging apparatus from being moved in the state.

  Thereby, it can prevent that said other member collides with an obstruction and is damaged. For example, in the case where the other member is a marker, it is possible to prevent the position of the marker from being shifted due to a collision, and the image data cannot be combined well. Can be obtained.

  According to the present invention, since the image receiving unit can be accurately slid to a plurality of positions for shooting, it is possible to easily obtain accurate image data for long shooting. In addition, according to the present invention, it is possible to reduce the time required for imaging, thereby reducing the burden on the subject.

It is the schematic side view which showed the structural example of the X-ray imaging apparatus which concerns on one Embodiment of this invention. It is a schematic plan view of the X-ray imaging apparatus of FIG. It is a block diagram for demonstrating the specific structure of a control part and an operation part.

  FIG. 1 is a schematic side view showing a configuration example of an X-ray imaging apparatus according to an embodiment of the present invention. FIG. 2 is a schematic plan view of the X-ray imaging apparatus of FIG. The X-ray imaging apparatus includes an imaging table 1, an X-ray irradiation unit 2, a control unit 3, an operation unit 4, and the like. At the time of X-ray imaging, as shown in FIG. 1, imaging can be performed by irradiating an X-ray irradiation unit 2 with X-rays on a subject H on the imaging table 1.

  The imaging table 1 is provided with a top plate 11 on which the subject H is placed and a main body 12 that horizontally supports the top plate 11. The top plate 11 is formed in, for example, a rectangular shape, and has a long shape that allows the entire body of the subject H to be placed in a prone position. X-ray imaging is performed with the subject H placed on the top plate 11 along the longitudinal direction X of the top plate 11.

  The main body 12 is provided with an image receiving unit 13 that performs imaging by receiving X-rays from the X-ray irradiation unit 2. The image receiving unit 13 is provided below the top plate 11, and X-rays irradiated downward from the X-ray irradiation unit 2 provided above the top plate 11 are received via the subject H. The image is received by the unit 13.

  The image receiving unit 13 includes an FPD (Flat Panel Detector) 131, a photometer 132, a grid 133, and a detector holding mechanism 134. The FPD 131 is an X-ray detector including a semiconductor element, for example. However, the X-ray detector is not limited to the FPD 131, and other detectors can be used.

  The photometer 132 is for adjusting the X-ray irradiation amount to the subject H to an appropriate value, and is disposed above the FPD 131. The grid 133 is for removing scattered radiation, and is disposed above the photometer 132. The FPD 131, the photometer 132, and the grid 133 are held by the detector holding mechanism 134 in a state where they are stacked from below in this order.

  The image receiving unit 13 can be slid along the longitudinal direction X of the top plate 11 by the drive mechanism 14. The drive mechanism 14 includes a ball screw 141, a motor 142, and a belt 143. The ball screw 141 is a so-called multi-row ball screw, and includes a screw shaft 141a, a nut 141b, and a ball (not shown).

  The screw shaft 141 a is made of, for example, metal, and is attached to the upper surface of the main body 12 along the longitudinal direction X of the top plate 11. The nut 141b is made of, for example, resin, and is fixed to the detector holding mechanism 134 of the image receiving unit 13 in a state where the screw shaft 141a is screwed. The screw shaft 141a is rotatably supported, and the end thereof is connected to the rotation shaft of the motor 142 via an endless belt 143.

  Thus, the belt 143 is rotated by driving the motor 142, and the screw shaft 141a is rotated by the rotational force. At this time, when the screw shaft 141a rotates with respect to the nut 141b, the detector holding mechanism 134 fixed to the nut 141b slides along the longitudinal direction X of the top plate 11.

  That is, as the motor 142 rotates, the image receiving unit 13 slides along the longitudinal direction X of the top plate 11 by a distance corresponding to the rotation amount. The motor 142 is composed of, for example, a pulse motor, and the image receiving unit 13 can be slid with high accuracy by controlling the rotation amount of the motor 142. However, the drive mechanism 14 is limited to the configuration including the ball screw 141, the motor 142, and the belt 143 as long as the image receiving portion 13 can be slid along the longitudinal direction X of the top plate 11. Instead, for example, a configuration including a wire, a chain, a linear motor, a gear, and the like may be used.

  In the present embodiment, the X-ray irradiation unit 2 moves in synchronization with the image receiving unit 13. That is, when the image receiving unit 13 slides along the longitudinal direction X of the top plate 11, the X-ray irradiating unit 2 also moves in the horizontal direction in conjunction with it, and the image receiving unit 13 and the X-ray irradiating unit 2 always move up and down. It is designed to face the direction.

  Further, when the height of the imaging table 1 is raised and lowered by the lifting mechanism 18 and the top plate 11 and the image receiving unit 13 are moved in the vertical direction, the X-ray irradiation unit 2 is also moved in the vertical direction in conjunction with the vertical direction. The distance of the X-ray irradiation unit 2 with respect to the image receiving unit 13 is kept constant. Thereby, X-rays can be irradiated to the subject H only in the minimum necessary range, and the exposure amount of the subject H can be reduced, so that the burden on the subject H can be reduced.

  When performing X-ray imaging using this X-ray imaging apparatus, X-ray imaging can be performed by selecting either manual slide processing or automatic slide processing. In the manual slide process, the image receiving unit 13 can be slid to an arbitrary position within the movable range along the longitudinal direction X of the top plate 11 to perform photographing. On the other hand, in the automatic slide process, the image receiving unit 13 can be automatically and intermittently slid to a plurality of predetermined positions along the longitudinal direction X of the top plate 11 and photographing can be performed at each position. Note that “intermittent” means an operation in which the image receiving unit 13 repeats moving and stopping.

  In the case of automatic slide processing, long image shooting can be realized by automatically combining a plurality of image data at each position imaged by the image receiving unit 13. Image data obtained by using the manual slide process or the automatic slide process can be displayed on a display unit including a liquid crystal display or printed by a printer.

  As described above, in the present embodiment, the image receiving unit 13 can be slid using the ball screw 141. Since the ball screw 141 has high movement accuracy and few errors, the image receiving unit 13 is slid to a plurality of positions by using the ball screw 141, and the image data photographed at each position is synthesized, thereby making it possible to accurately capture long images. Image data can be obtained. In particular, since the nut 141b is made of resin, sound and vibration during operation are small, so that the burden on the subject H can be reduced.

  As shown in FIG. 2, the main body 12 is provided with a plurality of markers 15 used when performing an automatic slide process. Each marker 15 is formed of a material such as a metal that does not transmit X-rays. Each marker 15 is revolved around, for example, the rotation shaft 151 so that it is positioned on the image receiving unit 13 as shown by a solid line in FIG. 2 and retracted from the image receiving unit 13 as shown by a broken line in FIG. It can be displaced to the state.

  At this time, the rotation shaft 151 functions as a marker displacement mechanism for retracting the marker 15 from the image receiving unit 13. The displacement of each marker 15 may be configured manually by an operator or may be configured automatically. However, the marker displacement mechanism is not limited to the rotating shaft 151 as long as the marker 15 can be retracted from the image receiving unit 13 and may be composed of other members.

  In the automatic slide process, the image receiving unit 13 is intermittently slid to a plurality of positions so that each marker 15 is positioned on the image receiving unit 13. Thereby, the image of each marker 15 reflected in the image data photographed at a plurality of positions serves as a mark when combining the image data. In this example, during the automatic slide processing, the image receiving unit 13 slides intermittently to three positions, and photographing is performed at each position. The shooting ranges by the image receiving unit 13 at each position partially overlap each other, and the marker 15 is reflected at the end position of the overlapping portion.

  Thus, by combining the image data using the marker 15 as a mark, it is possible to obtain accurate image data for long shooting. In particular, except when the image receiving unit 13 is automatically slid to perform shooting (for example, during manual slide processing), the marker 15 is retracted from the image receiving unit 13 to prevent the marker 15 from being inadvertently reflected. be able to. Therefore, imaging can be performed more favorably, and image data that is convenient for diagnosis without a missing portion can be obtained.

  In the present embodiment, the top plate 11 is held by the top plate holding mechanism 16 so as to be slidable in the horizontal direction with respect to the main body 12. The top plate holding mechanism 16 includes a plurality of first rollers 161 for holding the top plate 11 so as to be slidable in the longitudinal direction X, and the top plate 11 is slid in the width direction Y direction orthogonal to the longitudinal direction X. A plurality of second rollers 162 are included for possible holding. The first roller 161 and the second roller 162 are preferably made of resin.

  The first roller 161 and the second roller 162 are respectively attached to the main body 12 so as to be rotatable. Thereby, when an operator applies a force to the top plate 11 in the horizontal direction, the first roller 161 and the second roller 162 are appropriately rotated, and the top plate 11 is slid in an arbitrary direction in the horizontal direction. Be able to.

  That is, in this embodiment, the top plate 11 is held by the top plate holding mechanism 16 in a state in which the top plate 11 can slide in at least a direction intersecting the longitudinal direction X. Therefore, the subject H on the top 11 can be aligned with the image receiving unit 13 by sliding the top 11 in the direction intersecting the longitudinal direction X. Thereby, when aligning the imaging position with respect to the subject H, it is not necessary for the subject H to move on the top plate 11, and thus the burden on the subject H can be reduced.

  In this example, as shown by a two-dot chain line in FIG. 2, the top plate 11 can be slid by a predetermined amount L1 on one side in the longitudinal direction X, and can be slid by a predetermined amount L1 on the other side in the longitudinal direction X. It has become. The top plate 11 can be slid by a predetermined amount L2 on one side in the width direction Y, and can be slid by a predetermined amount L2 on the other side in the width direction Y. The predetermined amount L1 is about 320 mm, for example, and the predetermined amount L2 is about 180 mm, for example. An urging member made of, for example, a tension spring 17 is attached between the top plate 11 and the main body 12, and the top plate 11 is urged toward a reference position as shown by a solid line in FIG. .

  However, the top plate holding mechanism 16 is limited to a configuration including the first roller 161 and the second roller 162 as long as the top plate 11 is held in a state in which the top plate 11 is slidable at least in a direction crossing the longitudinal direction X. is not. For example, the top plate holding mechanism 16 may include only the second roller 162, and the top plate 11 may be configured to be slidable only in the width direction Y, or a horizontal direction intersecting the longitudinal direction X and the width direction Y Alternatively, the top plate 11 may be slidable. Further, the biasing member is not limited to the tension spring 17.

  The detector holding mechanism 134 holds the FPD 131 in a slidable state in the width direction Y of the top plate 11. Specifically, as shown by a broken line in FIG. 2, the FPD 131 is pulled out by a predetermined amount along the width direction Y of the top plate 11 and then the arm 134a is further extended in the width direction Y to further reduce the ceiling. The FPD 131 can be slid to the outside of a range (predetermined amount L2) in which the plate 11 can slide.

  Wiring (not shown) for electrically connecting the FPD 131 to the control unit 3 is connected to the FPD 131 via a connector. The wiring has such a length that the FPD 131 can be slid to a position indicated by a broken line in FIG. When replacing the FPD 131 with a different size, the FPD 131 can be removed from the detector holding mechanism 134 by removing the connector while the FPD 131 is slid to the position indicated by the broken line in FIG. .

  Thereby, even when the top plate 11 is slid in the width direction Y, the FPD 131 can be slid to the outside of the range (predetermined amount L2) in which the top plate 11 is slidable and taken out from the detector holding mechanism 134. it can. Therefore, it is not necessary to return the top plate 11 to the original position in order to take out the FPD 131, and the work efficiency is good, so the burden on the subject H can be reduced.

  However, the detector holding mechanism 134 is not limited to the width direction Y of the top plate 11 as long as the FPD 131 is configured to be slidable in a direction crossing the longitudinal direction X of the top plate 11. A configuration in which the FPD 131 is held while being slidable in the horizontal direction may be employed. Further, the FPD 131 is not limited to the configuration in which the FPD 131 is slid by the detector holding mechanism 134 while the connector is connected. For example, as the FPD 131 is slid by the detector holding mechanism 134, the FPD 131 automatically It may be configured to be detached.

  FIG. 3 is a block diagram for explaining specific configurations of the control unit 3 and the operation unit 4. The control unit 3 includes, for example, a CPU (Central Processing Unit), and when the CPU executes a program, the manual slide processing unit 31, the automatic slide processing unit 32, the image processing unit 33, the elevation processing unit 34, a lock It functions as various functional units such as the processing unit 35 and the irradiation processing unit 36.

  The operation unit 4 includes a slide instruction unit 41, a photographing instruction unit 42, an elevation instruction unit 43, a lock release instruction unit 44, and the like. The operator can operate the operation unit 4 using, for example, hands or feet.

  The manual slide processing unit 31 controls the drive mechanism 14 based on the operation of the slide instruction unit 41 by the operator, thereby sliding the image receiving unit 13 to an arbitrary position along the longitudinal direction X of the top plate 11. Process. At the time of manual slide processing, the operator can slide the image receiving unit 13 to an arbitrary position along the longitudinal direction X of the top plate 11 within a range where automatic slide processing is possible, and can perform photographing at that position. Thereby, independent image data can be obtained in a wide range without moving the subject H on the top plate 11.

  On the other hand, the automatic slide processing unit 32 controls the drive mechanism 14 based on the operation of the photographing instruction unit 42 by the operator. As a result, the image receiving unit 13 is intermittently slid to a plurality of predetermined positions along the longitudinal direction X of the top plate 11. The irradiation processing unit 36 controls the X-ray irradiation unit 2 based on the operation of the imaging instruction unit 42 by the operator, thereby realizing imaging at the plurality of positions.

  Specifically, when an imaging instruction unit 42 is operated by an operator, after imaging is performed by irradiating X-rays from the X-ray irradiating unit 2, a certain time passes automatically. The image receiving unit 13 is slid by a certain amount. Then, if the operator operates the imaging instruction unit 42 again after the slide, after the X-ray irradiation unit 2 irradiates X-rays again and performs imaging, the image is automatically received after a certain time has passed. The part 13 is slid by a certain amount. In this way, the image receiving unit 13 can be intermittently slid by a certain amount by using the operation of the photographing instruction unit 42 by the operator as a trigger.

  The certain time is a grace period for preventing noise from being generated in the captured image data. That is, after the processing for the captured image data is completed during the grace period, the image receiving unit 13 is slid to prevent noise associated with the sliding of the image receiving unit 13 from occurring in the image data. Thus, the image data photographed by the FPD 131 at a plurality of positions is synthesized by the image processing unit 33.

  As described above, in the present embodiment, the image receiving unit 13 is intermittently slid to a plurality of predetermined positions along the longitudinal direction X of the top plate 11, and a plurality of image data photographed at each position is automatically obtained. By synthesizing, image data of long photographing can be obtained. Therefore, since the image receiving unit 13 can be accurately slid to a plurality of positions and photographed, it is possible to easily obtain image data for long photographing that is accurate and free from deviation even if it is not an expert.

  In addition, since the image receiving unit 13 is intermittently slid to a plurality of predetermined positions and shooting is performed at each position, image data for long shooting can be automatically obtained. It can be shortened. Therefore, the burden on the subject H can be reduced as compared with a configuration in which the operator performs imaging after accurately adjusting the position of the image receiving unit 13.

  Furthermore, in the present embodiment, not only can image data for long shooting be obtained by automatic synthesis of image data shot at a plurality of positions, but also an operator can move the image receiving unit 13 along the longitudinal direction X of the top plate 11. Image data at an arbitrary position can also be obtained by sliding to an arbitrary position and shooting at that position. Therefore, if necessary, only the necessary part can be imaged to obtain image data, so that the burden on the subject H can be further reduced.

  The elevation processing unit 34 performs processing for raising or lowering the height of the imaging table 1 by controlling the elevation mechanism 18 based on the operation of the elevation instruction unit 43 by the operator. The elevating mechanism 18 is provided with a motor (not shown), for example, and by driving the motor, the top plate 11 and the upper surface of the main body 12 are moved up and down electrically. However, the elevating mechanism 18 is not limited to electric, and may be manually operated, for example. When the height of the photographic stand 1 is raised and lowered, it is preferable to be configured to notify the surroundings of danger by using a lamp or sound.

  The lock processing unit 35 performs a process for unlocking the top plate 11 by controlling the lock mechanism 19 based on the operation of the unlock instruction unit 44 by the operator. The lock mechanism 19 can lock the top plate 11 in a state where the top plate 11 is slid in the width direction Y from the reference position against the urging force of the tension spring 17. Thereafter, when the operator operates the lock release instructing unit 44 to instruct the lock release, the lock processing unit 35 releases the lock of the lock mechanism 19 with respect to the top plate 11.

  That is, in the present embodiment, the top plate 11 is slid in the width direction Y from the reference position, and after taking a picture with the top plate 11 locked, the lock is released, and thereby the biasing force of the tension spring 17 is used. The top plate 11 can be returned to the reference position side. Therefore, when moving the X-ray imaging apparatus, the top plate 11 is easily returned to the reference position side, and then the X-ray imaging apparatus is moved, so that other members are placed outside the top plate 11. It is possible to prevent the X-ray imaging apparatus from being moved in the overhanging state.

  Thereby, it can prevent that said other member collides with an obstruction and is damaged. For example, in the case where the other member is the marker 15, it is possible to prevent the position of the marker 15 from being shifted due to a collision and failing to combine the image data well. Image data can be obtained.

  In the above embodiment, the configuration in which the image receiving unit 13 slides intermittently to three positions during the automatic slide processing has been described. However, the present invention is not limited to this configuration, and a configuration in which the image receiving unit 13 slides intermittently to two positions or four or more positions and photographing is performed at each position may be employed.

DESCRIPTION OF SYMBOLS 1 Imaging stand 2 X-ray irradiation part 3 Control part 4 Operation part 11 Top plate 12 Main body 13 Image receiving part 14 Drive mechanism 15 Marker 16 Top plate holding mechanism 17 Tension spring 18 Lifting mechanism 19 Lock mechanism 31 Manual slide process part 32 Automatic slide process Unit 33 Image processing unit 34 Elevation processing unit 35 Lock processing unit 36 Irradiation processing unit 41 Slide instruction unit 42 Imaging instruction unit 43 Elevation instruction unit 44 Lock release instruction unit 131 FPD
132 Photometer 133 Grid 134 Detector holding mechanism 134a Arm 141 Ball screw 141a Screw shaft 141b Nut 142 Motor 143 Belt 151 Rotating shaft 161 First roller 162 Second roller H Subject X Longitudinal direction Y Width direction

Claims (7)

An X-ray imaging apparatus that performs imaging by irradiating a subject in a prone position with X-rays from an X-ray irradiation unit,
It has a long shape and a top plate for placing the subject along the longitudinal direction;
An image receiving unit that is provided below the top plate and performs imaging by receiving X-rays from the X-ray irradiation unit;
A drive mechanism for sliding the image receiving portion along the longitudinal direction of the top plate;
An automatic slide processing unit that intermittently slides the image receiving unit to a plurality of predetermined positions along the longitudinal direction of the top plate by controlling the drive mechanism;
An X-ray imaging apparatus comprising: an image processing unit that combines image data captured at the plurality of positions.   It further comprises a manual slide processing unit that controls the drive mechanism based on an operation by an operator to slide the image receiving unit to an arbitrary position within a movable range along the longitudinal direction of the top plate. The X-ray imaging apparatus according to claim 1, wherein: A marker that serves as a marker when the image processing unit synthesizes image data by being positioned on the image receiving unit when the automatic slide processing unit slides the image receiving unit to perform shooting, and
The X-ray imaging apparatus according to claim 1, further comprising a marker displacement mechanism for retracting the marker from the image receiving unit. The drive mechanism includes a ball screw including a screw shaft, a nut, and a ball,
The nut is formed of resin,
The X-ray imaging apparatus according to claim 1, wherein the image receiving unit slides by rotating the screw shaft extending along a longitudinal direction of the top plate with respect to the nut. .   The X-ray imaging apparatus according to any one of claims 1 to 4, further comprising a top plate holding mechanism that holds the top plate in a slidable state at least in a direction crossing the longitudinal direction. The image receiving unit includes an X-ray detector, and a detector holding mechanism that holds the X-ray detector in a slidable state in a direction crossing the longitudinal direction of the top plate,
The detector holding mechanism is configured such that the X-ray detector can be slid out of the range in which the top plate can slide by the top plate holding mechanism and taken out from the detector holding mechanism. The X-ray imaging apparatus according to claim 5. An urging member for urging the top plate toward a reference position;
The top plate can be locked in a state where the top plate is slid in a direction crossing the longitudinal direction from the reference position against the urging force by the urging member, and based on an operation by an operator. The X-ray imaging apparatus according to claim 5, further comprising a lock mechanism that releases the lock of the top plate.

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