JP2017164131A - Fluoroscopic apparatus, fluoroscopic table, and fluoroscopic photographing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluoroscopic apparatus that improves safety by suppressing the rotation of a fluoroscopic table and prevents a region of interest from deviating from the center of an X-ray when a gravity center position of a subject is high.SOLUTION: A fluoroscopic apparatus includes an X-ray tube device for irradiating an X-ray onto a subject, a top plate on which the subject is placed, a rolling mechanism for causing the top plate to rotate in a lateral direction, a fluoroscopic table having a grip bar for the subject to grip while the top plate is rotating, a detector installed on a side opposite to the X-ray tube device so as to sandwich the subject placed on the top plate for detecting the X-ray that has penetrated the subject, estimation means for estimating a gravity center position of the subject on the top plate, and a control part for controlling an operation of the X-ray tube device or the fluoroscopic table based on the gravity center position estimated by the estimation means.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an X-ray fluoroscopic apparatus having a fluoroscopic table on which a subject is placed.

  The X-ray fluoroscopic apparatus acquires an X-ray signal by irradiating a subject to be imaged with X-rays and detecting the X-ray transmitted through the subject with an X-ray detector. Then, the X-ray fluoroscopic apparatus processes the acquired X-ray signal with an image processing unit to form an X-ray image or a fluoroscopic image, and displays the X-ray image on the display unit as a captured image of the subject.

  The X-ray fluoroscopic apparatus has an X-ray tube device held above a subject via a support column on a fluoroscopic imaging table on which the subject is placed, and moved to an arbitrary position by moving the irradiation position with a remote control lever or the like. X-rays are irradiated. As described in Patent Document 1, an invention of an apparatus for rotating a top plate of a fluoroscopic imaging table is also disclosed.

JP 55-35653 A

  However, since the invention described in Patent Document 1 does not consider the position of the center of gravity of the subject, no countermeasure is taken against the subject falling from the top due to the rotation of the top of the fluoroscopic imaging table. . In addition, no countermeasure is taken against the region of interest (ROI) being shifted from the X-ray center due to the rotation of the top of the fluoroscopic imaging table.

  Therefore, an object of the present invention is to provide an X-ray fluoroscopic imaging apparatus that improves the safety by suppressing the rotation of the top plate of the fluoroscopic imaging table when the position of the center of gravity of the subject is high.

  Another object of the present invention is to provide an X-ray fluoroscopic imaging apparatus that prevents the region of interest from being displaced from the X-ray center due to the rotation of the top plate of the fluoroscopic imaging table.

  In order to solve the above-described problems, an X-ray fluoroscopic apparatus according to the present invention includes an X-ray tube device that irradiates a subject with X-rays, a top plate on which the subject is placed, and the top plate in a lateral direction. A X-ray tube apparatus sandwiching the subject placed on the top plate, and a rolling mechanism for rotating the top plate, a fluoroscopic imaging table having a gripping rod for gripping the subject while the top plate is turning Installed on the opposite side of the X-ray detector for detecting X-rays transmitted through the subject, an estimation means for estimating the position of the center of gravity of the subject on the top plate, and the estimation means And a control unit that controls the operation of the X-ray tube apparatus or the fluoroscopic imaging table based on the position of the center of gravity.

  According to the present invention, since the body thickness of the subject is thick, even when the center of gravity of the subject is located above the center of rotation of the top of the fluoroscopic imaging table, the top of the fluoroscopic imaging table can be rotated. The possibility that the subject falls from the fluoroscopic imaging table can be reduced by increasing the angle.

  In addition, even if the subject's center of gravity is located above the center of rotation of the top of the fluoroscopic imaging table because the subject's body is thick, the center of the X-ray is detected by the rotation of the top of the fluoroscopic imaging table. It is possible to prevent the region of interest from deviating.

1 is a perspective view of an X-ray fluoroscopic apparatus according to the present invention. It is a block diagram which shows the structure of the X-ray fluoroscopic apparatus which is this invention. It is a front view for demonstrating the rolling mechanism of the X-ray fluoroscope which is this invention. It is a front view for demonstrating the moving mechanism of the X-ray fluoroscope which is this invention. It is a block diagram which shows the structure of the control part of the X-ray fluoroscope which is this invention. It is a flowchart which shows the flow of gravity center position estimation of the X-ray fluoroscopic imaging apparatus which is this invention. It is a front view for demonstrating the estimation means of the X-ray fluoroscopic imaging apparatus which is this invention. It is a flowchart which shows the flow of rolling control of the X-ray fluoroscope which is this invention. It is a front view for demonstrating rolling control of the X-ray fluoroscope which is this invention. It is a flowchart which shows the flow of irradiation position correction | amendment of the X-ray fluoroscope which is this invention. It is a front view for demonstrating irradiation position correction | amendment of the X-ray fluoroscope which is this invention. It is a flowchart which shows the flow of irradiation position correction | amendment of the X-ray fluoroscope which is this invention. It is a front view for demonstrating irradiation position correction | amendment of the X-ray fluoroscope which is this invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, what has the same function attaches | subjects the same code | symbol, and the repeated description may be abbreviate | omitted.

  First, an X-ray fluoroscopic apparatus according to the present invention will be described. FIG. 1 is a perspective view of an X-ray fluoroscopic apparatus. FIG. 2 is a block diagram showing the configuration of the X-ray fluoroscopic apparatus. FIG. 3 is a front view for explaining the rolling mechanism of the X-ray fluoroscopic apparatus. FIG. 4 is a front view for explaining a moving mechanism of the fluoroscopic imaging apparatus.

  As shown in FIG. 1, the X-ray fluoroscopic apparatus 100 irradiates a subject 700 (see FIG. 2) to be imaged with X-rays and detects X-rays transmitted through the subject 700, thereby A device that captures a line image or a fluoroscopic image, and includes a fluoroscopic imaging table 200, an X-ray tube device 300, an X-ray detector 400, and the like.

  The fluoroscopic imaging table 200 includes a top plate 210 on which the subject 700 is placed, a rolling mechanism 800 that pivots the top plate 210 on which the subject 700 is placed in a lateral direction so as to swing left and right, and the top plate 210 being rotated. The object 700 on the top plate 210 includes a gripping rod 220 for gripping the subject 700 so as not to fall from the top plate 210.

  The X-ray tube apparatus 300 converts an X-ray tube that converts high-voltage electric energy into X-rays and irradiates the subject 700, and an irradiation region of the X-ray irradiated from the X-ray tube to the subject 700. An X-ray stop 310 to be set and a column 320 installed on the fluoroscopic imaging table 200 so that the X-ray tube is supported above the subject 700 are included. Note that the X-ray tube may have an X-ray filter that selectively transmits X-rays having specific energy. The X-ray diaphragm 310 has a plurality of lead plates for X-ray shielding, and the irradiation region may be determined by moving them.

  The X-ray detector 400 is installed at a position facing the X-ray tube apparatus 300 with the subject 700 interposed therebetween, and detects X-rays transmitted through the subject 700. That is, the X-ray tube apparatus 300 is disposed above the subject 700, and the X-ray detector 400 is attached to the lower side of the top plate 210 that is the opposite side. As the X-ray detector 400, for example, there is an FPD (Flat Panel Detector) or the like, a plurality of inspection elements are arranged in a two-dimensional array, and X corresponding to the amount of incident X-rays transmitted through the subject 700 Detect line signal.

  As shown in FIG. 2, the fluoroscopic imaging apparatus 100 also includes a control unit 500 for managing each unit such as acquiring information from each unit and issuing an operation command to each unit. The control unit 500 is a processor such as a CPU, and executes a programmed process.

  Specifically, the control unit 500 includes an image processing unit 510, a storage unit 520, a display unit 530, an operation unit 540, and the like, and includes a high voltage generation unit 330, a fluoroscopic imaging table 200, an X-ray tube apparatus 300, and an X-ray tube apparatus 300. The line detector 400 and the distance meter 600 are controlled. In addition, the control unit 500 also performs calculation processing in an estimation unit for estimating the center of gravity position 930 of the subject 700.

  Note that the estimation means includes, for example, a distance meter 600 in order to input parameters when the control unit 500 estimates the center of gravity position 930 of the subject 700. The distance meter 600 measures the distance from the X-ray tube apparatus 300 to the surface of the subject 700 using ultrasonic waves or light. Based on the distance measured by the distance meter 600, the estimation means calculates the body thickness of the subject 700 by the control unit 500 and estimates the center of gravity position 930 of the subject 700.

  The image processing unit 510 performs image processing on the X-ray signal output from the X-ray detector 400. Image processing includes gamma conversion, gradation conversion, image enlargement or reduction, and the like. Note that although a part of the control unit 500 may also serve as the image processing unit 510, a command specialized for image processing, such as a GPU, is separately used as the image processing unit 510 from the control unit 500 to the image processing unit 510. May be issued.

  The storage unit 520 stores the X-ray image and fluoroscopic image processed by the image processing unit 510 in a storage device. The storage device includes a semiconductor memory used as a work area for the CPU and a recording medium such as a hard disk used as a storage area for image data and the like.

  Display unit 530 outputs the X-ray image or fluoroscopic image stored in storage unit 520 to the output device. For example, an image is displayed on a monitor or the like. If necessary, the image may be displayed on the display unit 530 after being processed by the control unit 500 such as editing an image.

  The operation unit 540 is an interface through which an operator issues an instruction to issue an operation command to each unit to the control unit 500 via an input device (for example, an operation button). Note that a GUI or the like that issues an instruction to a button or the like displayed on the display unit 530 with a pointing device (for example, a mouse) may be used.

  The high voltage generator 330 generates high voltage electrical energy in accordance with a command from the controller 500 and supplies power to the X-ray tube apparatus 300. For the X-ray tube apparatus 300 and the X-ray diaphragm 310 as well, the control unit 500 sets the X-ray diaphragm so as to be an irradiation region designated by the operator, and the control unit is instructed by the operator instructing X-ray irradiation. 500 irradiates the X-ray tube apparatus 300 with X-rays.

  In the fluoroscopic imaging table 200, the top panel 210 can be rotated when the control unit 500 commands the rolling mechanism 800. Further, in the fluoroscopic imaging table 200, the top panel 210 and the X-ray detector 400 can be moved in the horizontal direction or the X-ray tube apparatus 300 can be moved in the horizontal direction when the control unit 500 instructs.

  As shown in FIG. 3, the rolling mechanism 800 rotates the top plate 210 with the rotation center 910 as a rotation axis, and gives the top plate 210 an inclination with a rolling angle 920 with respect to the X-ray center 900. The axis when the X-ray irradiated from the X-ray tube device 300 is detected by the X-ray detector 400 is taken as the X-ray center 900, and the rotation axis when the top plate 210 is rotated by the rolling mechanism 800 is rotated. A moving center 910 is assumed, and an inclination angle of the top plate 210 with respect to the X-ray center 900 is a rolling angle 920.

  Further, as shown in FIG. 4, the fluoroscopic imaging table 200 includes a top plate moving mechanism 810 or an X-ray tube moving mechanism 820. The top plate moving mechanism 810 moves the top plate 210 and the X-ray detector 400 in the horizontal direction according to a command from the control unit 500. Further, the X-ray tube moving mechanism 820 moves the X-ray tube apparatus 300 in the horizontal direction according to a command from the control unit 500.

  Next, processing executed by the control unit of the fluoroscopic imaging apparatus will be described. FIG. 5 is a block diagram illustrating a configuration of the control unit. FIG. 6 is a flowchart showing a flow of estimating the gravity center position. FIG. 7 is a front view for explaining the estimation means. FIG. 8 is a flowchart showing the flow of rolling control. FIG. 9 is a front view for explaining the rolling control.

  As shown in FIG. 5, the control unit 500 executes processes such as center-of-gravity position estimation 501, rolling control 502, and irradiation position correction 503. Note that the processing of the rolling control 502 or the irradiation position correction 503 is executed based on the processing result of the gravity center position estimation 501. In addition, about each step of these processes, a part addition, a part omission, and a part replacement may be performed if the target result is obtained.

  The center-of-gravity position estimation 501 is a calculation process executed by the control unit 500 when the estimation unit estimates the center-of-gravity position 930 of the subject 700. Note that information detected by the distance meter 600 or the pressure sensor 610 is used to estimate the center of gravity position 930.

  The rolling control 502 is a control process executed by the control unit 500 when the top plate 210 is rotated by the rolling mechanism 800. The control unit 500 controls the operation of the rolling mechanism 800 so that the subject 700 does not fall from the top board 210 after the center of gravity position 930 of the subject 700 is estimated by the center of gravity position estimation 501. Note that the control unit 500 also confirms whether the subject 700 is grasping the grip rod 220 with the grip detector 221. The grip detector 221 may be installed by attaching a temperature sensor, a pressure sensor or the like to the grip rod 220.

  The irradiation position correction 503 is a control process executed by the control unit 500 when the top plate 210 or the X-ray tube apparatus 300 is moved by the top plate moving mechanism 810 or the X-ray tube moving mechanism 820. The control unit 500 controls the operation of the top plate moving mechanism 810 or the X-ray tube moving mechanism 820 to adjust the X-ray irradiation position after the center of gravity position 930 of the subject 700 is estimated by the center of gravity position estimation 501. To do.

  As shown in FIG. 6, the center-of-gravity position estimation 501 includes steps such as measurement value acquisition S01, distance calculation S02, body thickness calculation S03, and center-of-gravity position calculation S04. First, the operator places the subject 700 on the fluoroscopic imaging table 200 and starts an examination. As shown in FIG. 7A, the distance meter 600 is attached below the X-ray diaphragm 310 of the X-ray tube device 300. As the distance meter 600, for example, an ultrasonic distance meter is used. The ultrasonic wave is transmitted from the ultrasonic vibrator of the ultrasonic distance meter, and the ultrasonic wave reflected by the subject 700 is received by the ultrasonic vibrator, so that the distance from the ultrasonic wave velocity and propagation time to the subject 700 can be determined. measure.

  The estimation means acquires the distance to the subject 700 measured by the distance meter 600 (measurement value acquisition S01), and takes into account the offset such as the width of the distance meter 600 and the distance from the X-ray diaphragm 310 to the skin of the subject 700. Is calculated (distance calculation S02). Then, the estimation means calculates the body thickness of the subject 700 based on the distance from the X-ray diaphragm 310 to the top plate 210 that has been grasped in advance (body thickness calculation S03), and the center of gravity of the subject 700 is calculated from the body thickness. A position 930 is estimated (centroid position calculation S04).

  The center-of-gravity position 930 of the subject 700 is estimated based on the position through which the rotation axis passes when the subject 700 rotates in accordance with the rotation of the top 210, the position through which the body axis of the subject 700 passes, and the like. Just do it.

  Further, as shown in FIG. 7B, the estimation means uses the pressure sensor 610 instead of the distance meter 600, acquires the weight of the subject 700 measured by the pressure sensor 610, and the body axis of the subject 700. The position may be estimated.

  As shown in FIG. 8, the rolling control 502 includes setting value acquisition S11, gravity center position estimation 501, gravity center confirmation S12, angle confirmation S13, grip detection confirmation S14, rolling deceleration S15 or rolling normal speed S16, operation completion confirmation S17, and the like. Has steps. First, the operator places the subject 700 on the fluoroscopic imaging table 200.

  The control unit 500 acquires the setting value input by the operator via the operation unit 540 and the setting value recorded in advance in the storage unit 520 (setting value acquisition S11). The set value includes an upper limit value of the rolling angle 920, a condition of the rolling angle 920 according to the center of gravity position 930, information on the subject 700, a rotation center 910, a distance from the X-ray diaphragm 310 to the top plate 210, and the like.

  The estimation unit executes the gravity center position estimation 501 and acquires the gravity center position 930 of the subject 700. And the control part 500 performs gravity center confirmation S12, angle confirmation S13, and grip detection confirmation S14. Note that the grip detection confirmation S14 may be omitted.

  When the center of gravity position 930 is higher than the rotation center 910 (centroid confirmation S12: Yes), when the rolling angle 920 is large (angle confirmation S13: Yes), and the subject 700 is grasping the grasping rod 220. If not detected (grip detection confirmation S14: No), the rolling operation speed of the top plate 210 is decreased according to the stage (rolling deceleration S15).

  In addition, when the center of gravity position 930 is lower than the rotation center 910 (centroid confirmation S12: No), when the rolling angle 920 is small (angle confirmation S13: No), or when the grip detector 221 detects (grip detection confirmation S14). : Yes) normalizes the rolling operation speed of the top plate 210 (rolling normal speed S16).

  When the rolling operation of the top plate 210 is continued, the center-of-gravity confirmation S12, the angle confirmation S13, and the grip detection confirmation S14 are repeated, and the control of the rolling deceleration S15 or the rolling normal speed S16 is executed (operation completion confirmation S17: No). When the rolling operation is finished, the processing of the rolling control 502 is finished.

  The condition of the rolling angle 920 for reducing the rolling operation speed of the top plate 210 may be determined depending on how much the center of gravity position 930 of the subject 700 is higher than the rotation center 910 of the top plate 210. For example, as shown in FIG. 9A, when the center of gravity position 930 is 1 cm higher than the rotation center 910, as shown in FIG. 9B, when the rolling angle 920 exceeds 30 degrees, the normal speed is exceeded. For example, the speed is reduced by 10%. When the center of gravity position 930 is 2 cm higher than the rotation center 910, when the rolling angle 920 exceeds 15 degrees, it is decelerated by 10% from the normal speed, and when the rolling angle 920 exceeds 30 degrees, it is 2% lower than the normal speed. And so on.

  In addition, when the rolling angle 920 reaches the upper limit value, the control unit 500 restricts the top plate 210 from further tilting, but when the center of gravity position 930 is high, the control unit 500 decreases the upper limit value of the rolling angle 920. It may be made variable.

  As described above, even when the center of gravity 930 of the subject 700 is located above the rotation center 910 of the top plate 210 of the fluoroscopic imaging table 200 because the body of the subject 700 is thick, the rotation of the fluoroscopic imaging table 200 is performed. The possibility that the subject 700 falls from the fluoroscopic imaging table 200 can be reduced by increasing the angle of movement.

  In the first embodiment, among the processes executed by the control unit of the fluoroscopic imaging apparatus, the process related to the prevention of the subject from falling due to the rotation of the top plate has been described. Processing related to deviation prevention will be described. FIG. 10 is a flowchart showing a flow of irradiation position correction of the X-ray fluoroscopic apparatus. FIG. 11 is a front view for explaining irradiation position correction of the X-ray fluoroscopic apparatus.

  As shown in FIG. 10, the irradiation position correction 503 includes steps such as a gravity center position estimation 501, a positional deviation amount calculation S <b> 21, an angle confirmation S <b> 22, a shift amount calculation S <b> 23, a top plate shift S <b> 24, and an operation end confirmation S <b> 25. First, the operator places the subject 700 on the fluoroscopic imaging table 200.

  In addition, the control unit 500 acquires a setting value input by the operator via the operation unit 540 and a setting value recorded in advance in the storage unit 520. The set values include the upper limit value of the rolling angle 920, the region of interest 940, information on the subject 700, the rotation center 910, the distance from the X-ray diaphragm 310 to the top 210, the X-ray tube device 300 and the fluoroscopic imaging table 200, There is an initial position of the X-ray detector 400 and the like.

  The estimation unit executes the gravity center position estimation 501 and acquires the gravity center position 930 of the subject 700. In addition, the control unit 500 calculates a displacement amount between the rotation center 910 of the top plate 210 and the center of gravity position 930 of the subject 700 (position displacement amount calculation S21). And the control part 500 performs angle confirmation S22.

  When there is a rolling angle 920 (angle confirmation S22: Yes), the control unit 500 estimates how much the region of interest 940 of the subject 700 is deviated from the X-ray center 900 from the rolling angle 920 and the positional deviation amount. A shift amount of the top plate 210 for correcting the deviation is calculated (shift amount calculation S23). Then, the control unit 500 instructs the top plate moving mechanism 810 to move the top plate 210 by the calculated shift amount (top plate shift S24).

  When the rolling operation of the top plate 210 is continued, the angle confirmation S22 is repeated, and the control of the shift amount calculation S23 and the top plate shift S24 is executed (operation completion confirmation S25: No). When the rolling operation is finished, the irradiation position correction 503 process is finished.

  For example, as shown in FIG. 11A, when the region of interest 940 of the subject 700 is shifted from the X-ray center 900 to the right by tilting the rolling angle 920 of the top plate 210 by 30 degrees, FIG. As shown in b), the region of interest 940 is positioned at the X-ray center 900 by shifting the top plate 210 and the X-ray detector 400 to the left.

  Thus, even when the center of gravity 930 of the subject 700 is located above the rotational center 910 of the top plate 210 of the fluoroscopic imaging table 200 because the subject 700 is thick, the top of the fluoroscopic imaging table 200 is It is possible to prevent the region of interest 940 from deviating from the X-ray center 900 due to the rotation of the plate 210. Furthermore, even if the center of gravity position 930 of the subject 700 is below the rotation center 910 of the top board 210, if there is a shift of the region of interest 940, it can be corrected.

  In the second embodiment, an example in which the top plate and the X-ray detector are shifted and moved is shown as a process for preventing the shift of the region of interest due to the rotation of the top plate, but the video system (X-ray tube device) is shifted and moved. Also good. FIG. 12 is a flowchart showing a flow of irradiation position correction of the X-ray fluoroscopic apparatus. FIG. 13 is a front view for explaining irradiation position correction of the X-ray fluoroscopic apparatus.

  As shown in FIG. 12, with respect to the irradiation position correction 503, the top plate shift S24 step is replaced with an X-ray tube device shift S24a. That is, the control unit 500 estimates how much the region of interest 940 of the subject 700 is deviated from the X-ray center 900 from the rolling angle 920 and the positional deviation amount, and calculates the shift amount of the top 210 (shift amount). In step S23), the X-ray tube moving mechanism 820 is instructed to move the X-ray tube apparatus 300 by the calculated shift amount (X-ray tube apparatus shift S24a).

  For example, as shown in FIG. 13A, when the region of interest 940 of the subject 700 is shifted to the right from the X-ray center 910 by tilting the rolling angle 920 of the top plate 210 by 30 degrees, FIG. As shown in b), the region of interest 940 is positioned at the X-ray center 910 by shifting the X-ray tube apparatus 300 to the right.

  Similarly to the second embodiment, even if the subject 700 has a large body thickness, the center of gravity 930 of the subject 700 is located above the rotation center 910 of the top plate 210 of the perspective imaging base 200. It is possible to prevent the region of interest 940 from deviating from the X-ray center 900 due to the rotation of the 200 top plates 210. In addition, since it is not necessary to move the top plate 210 on which the subject 700 is placed, vibration of the top plate 210 can be suppressed, and the burden on the subject 700 at the time of examination can be reduced.

  As mentioned above, although the Example of this invention was described, it is not limited to these. For example, since the rolling control 502 and the irradiation position correction 503 are performed after estimating the center of gravity position 501, the safety of the inspection by the fluoroscopic imaging apparatus 100 is improved by combining the rolling control 502 and the irradiation position correction 503. In addition to the above, the inspection throughput can be improved.

  In the present embodiment, the X-ray detector 400 is attached to the lower side of the top plate 210 of the fluoroscopic imaging table 200, but may be installed independently of the top plate 210. The top plate 210 may be moved to the left and right so that the X-ray tube apparatus 300 and the X-ray detector 400 are linked without moving to the left and right, so that the X-ray center 900 is aligned with the region of interest 940.

DESCRIPTION OF SYMBOLS 100: X-ray fluoroscopic imaging apparatus 200: Radiographic imaging stand 210: Top plate 220: Grip stick 221: Grip detector 300: X-ray tube apparatus 310: X-ray aperture 320: Support | pillar 330: High voltage generation part 400: X-ray detection Device 500: Control unit 501: Center of gravity position estimation 502: Rolling control 503: Irradiation position correction 510: Image processing unit 520: Storage unit 530: Display unit 540: Operation unit 600: Distance meter 610: Pressure sensor 800: Rolling mechanism 810: Top plate moving mechanism 820: X-ray tube moving mechanism 900: X-ray center 910: Center of rotation 920: Rolling angle 930: Center of gravity position 940: Region of interest

Claims (12)

An X-ray tube device for irradiating the subject with X-rays;
A fluoroscopic imaging table having a top plate on which the subject is placed, a rolling mechanism for rotating the top plate in a lateral direction, and a gripping rod for the subject to grip while the top plate is rotating;
An X-ray detector installed on the opposite side of the X-ray tube device so as to sandwich the subject placed on the top plate, and detecting X-rays transmitted through the subject;
Inference means for estimating the position of the center of gravity of the subject on the top plate;
A control unit for controlling the operation of the X-ray tube apparatus or the fluoroscopic imaging table based on the position of the center of gravity estimated by the estimation means,
X-ray fluoroscopic apparatus characterized by the above. The estimation means includes a distance meter that measures a distance from the X-ray tube device to the subject,
Calculating the body thickness of the subject from the distance measured by the distance meter, and estimating the position of the center of gravity of the subject;
The X-ray fluoroscopic apparatus according to claim 1. The control unit rotates the top plate to the rolling mechanism so that the subject does not fall due to the rotation of the top plate when the center of gravity estimated by the estimation unit is higher than a predetermined height. Decelerate,
The X-ray fluoroscopic apparatus according to claim 1 or 2, wherein The predetermined height is a rotation center of the top plate.
The X-ray fluoroscopic apparatus according to claim 3. When the control unit detects that the subject is holding the grip rod, the control unit does not decelerate rotation of the top plate in the rolling mechanism.
The X-ray fluoroscopic imaging apparatus according to claim 3 or 4, The fluoroscopic imaging stand has a top plate moving mechanism for moving the position of the top plate,
The control unit determines the region of interest of the subject by the rotation of the top plate and the X-ray center of the X-ray tube apparatus from the position of the center of gravity estimated by the estimation means and the amount of displacement of the rotation center of the top plate. Calculating a shift amount to correct the deviation from, and gives a movement instruction to the top plate moving mechanism,
The X-ray fluoroscopic apparatus according to claim 1 or 2, wherein The fluoroscopic table has an X-ray tube moving mechanism that moves the position of the X-ray tube device;
The control unit determines the region of interest of the subject by the rotation of the top plate and the X-ray center of the X-ray tube apparatus from the position of the center of gravity estimated by the estimation means and the amount of displacement of the rotation center of the top plate. Calculating a shift amount to correct the deviation from, and issuing a movement instruction to the X-ray tube moving mechanism,
The X-ray fluoroscopic apparatus according to claim 1 or 2, wherein   The fluoroscopic imaging stand used for the X-ray fluoroscopic imaging apparatus as described in any one of Claims 1 thru | or 7. Measure the distance from the X-ray tube device that irradiates the subject with X-rays to the subject placed on the top of the fluoroscopic table,
Estimating the position of the center of gravity of the subject based on the body thickness of the subject calculated from the distance,
When the position of the center of gravity is higher than a predetermined height, the rotation of the top plate is decelerated so that the subject does not fall due to the rotation of the top plate.
X-ray fluoroscopic imaging method characterized by the above. The predetermined height is a rotation center of the top plate.
The X-ray fluoroscopic imaging method according to claim 9. Measure the distance from the X-ray tube device that irradiates the subject with X-rays to the subject placed on the top of the fluoroscopic table,
Estimating the position of the center of gravity of the subject based on the body thickness of the subject calculated from the distance,
Based on the position of the center of gravity and the amount of positional deviation of the rotation center when the top plate is rotated, the shift between the region of interest of the subject and the X-ray center of the X-ray tube device due to the rotation of the top plate is determined. Calculate the shift amount to be corrected and move the position of the top plate,
X-ray fluoroscopic imaging method characterized by the above. Measure the distance from the X-ray tube device that irradiates the subject with X-rays to the subject placed on the top of the fluoroscopic table,
Estimating the position of the center of gravity of the subject based on the body thickness of the subject calculated from the distance,
Based on the position of the center of gravity and the amount of positional deviation of the rotation center when the top plate is rotated, the shift between the region of interest of the subject and the X-ray center of the X-ray tube device due to the rotation of the top plate is determined. Calculating a shift amount to be corrected, and moving the position of the X-ray tube apparatus;
X-ray fluoroscopic imaging method characterized by the above.

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