JP5943351B2 - X-ray fluoroscopic imaging apparatus and X-ray fluoroscopic imaging method - Google Patents

Description

  The present invention relates to an X-ray fluoroscopic apparatus, and more particularly to movement control of an X-ray detector when acquiring a captured image with a reduced magnification.

  An apparatus that irradiates a subject with X-rays and images the transmitted X-rays transmitted through the subject on an X-ray film using a cassette, and converts the transmitted X-rays into electrical signals to obtain a fluoroscopic image as digital data In an X-ray imaging apparatus that uses an X-ray detector such as a digital radiography apparatus (DR apparatus) such as an image intensifier (II) or a flat panel detector (FPD), when acquiring a fluoroscopic image using a DR apparatus, Remove the cassette tray with a certain thickness that accommodates the X-ray film placed between the DR device and the top plate on which the subject is placed so that the acquired fluoroscopic image becomes a high-quality image with reduced blur. Thus, there has been a technique for reducing the distance between the X-ray detector and the top plate and suppressing the magnification of the fluoroscopic image (Patent Document 1).

  In addition, in an X-ray imaging apparatus that acquires a fluoroscopic image and a captured image using only an X-ray detector, an operator visually checks the positional relationship between the X-ray detector and the top plate when acquiring a captured image with a reduced magnification. However, the operation of reducing the distance between the X-ray detector and the top plate was performed.

JP 2007-209420 A

  However, in the apparatus for imaging on the X-ray film using the cassette and the apparatus using the X-ray detector in combination, it is necessary to remove the cassette tray each time in order to obtain a fluoroscopic image with a reduced magnification rate. For devices that acquire fluoroscopic images and radiographs using only the X-ray detector, the operator grasps the positional relationship between the X-ray detector and the top board each time, and reduces the distance between the X-ray detector and the top board. Therefore, it took time and labor for the operator to acquire images.

  Therefore, an object of the present invention is to obtain an X-ray fluoroscopic imaging apparatus and an X-ray fluoroscopic imaging capable of easily positioning a X-ray detector and acquiring a radiographic image when acquiring a radiographed image with a reduced magnification. Is to provide a method.

  In order to solve the above-described problems, the present invention is configured as follows.

The top plate on which the subject is placed, the X-ray source that irradiates the subject with X-rays, the X-ray diaphragm device that sets the X-ray irradiation area that irradiates the subject with X-rays, and the X-ray source facing the support device and X-ray detector for detecting transmitted X-ray of the patient is arranged, the supporting device supports, the X-ray source, a support unit moving mechanism for moving operate an X-ray diaphragm device and the X-ray detector, X-ray detector In an X-ray fluoroscopic apparatus comprising an image processing unit that converts transmitted X-rays output from an X-ray image and a display device that displays an X-ray image, an X-ray detector is moved to move the X-ray An X-ray detector moving mechanism that varies a distance between the source and the X-ray detector, and the X-ray detector moving mechanism determines the position of the X-ray detector from the first position where the fluoroscopic image of the subject is acquired. An X-ray fluoroscopic imaging apparatus, wherein the X-ray fluoroscopic imaging apparatus is characterized in that the acquired fluoroscopic image is moved to a second position where a captured image with a small magnification is acquired.

  According to the present invention, there is provided an X-ray fluoroscopic imaging apparatus and an X-ray fluoroscopic imaging method capable of easily positioning a X-ray detector and acquiring a radiographic image when acquiring a radiographic image with a reduced magnification. Can be provided.

Block diagram showing the whole of the first embodiment (a), (b) The figure for demonstrating each positional relationship of the X-ray source 103, the X-ray aperture device 104, the X-ray detection part 105, and the top plate 102 The figure for demonstrating operation | movement of the X-ray source 103, the X-ray aperture apparatus 104, and the X-ray detection part 105 at the time of acquiring a fluoroscopic image in the body-axis direction of the subject 101 (a), (b) The figure for demonstrating operation | movement of the X-ray detection part 105 at the time of a fluoroscopic image and a picked-up image acquisition Flowchart diagram for explaining the first embodiment (a), (b) for explaining the second embodiment The figure which showed an example of the photography reservation screen displayed on the display apparatus 117 (a), (b) is a diagram showing an example of a display screen displayed on the display device 117 when shooting is performed based on a shooting reservation Flowchart for explaining the first embodiment Functional block diagram for explaining the first embodiment

  The X-ray fluoroscopic apparatus of the present invention will be described in detail below with reference to the accompanying drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments of the invention, and the repetitive description thereof is omitted. FIG. 1 is a diagram showing a configuration example of an X-ray fluoroscopic apparatus according to the present invention.

  The X-ray fluoroscopic apparatus shown in FIG. 1 includes a top plate 102 on which a subject 101 is placed, an X-ray source 103 that irradiates the subject 101 with X-rays, and an X-ray diaphragm that sets an X-ray irradiation area for the subject 101 An X-ray detector 105a including an apparatus 104, an X-ray detector 105a that detects X-rays irradiated from the X-ray source 103 and transmitted through the subject 101, an X-ray source 103 and an X-ray diaphragm device 104, A support device 106 that supports and detects the X-ray source 103 and the X-ray diaphragm device 104 by supporting and moving the support device 106. The detection unit 105 is rotated in a direction with the longitudinal direction of the top plate 102 (hereinafter referred to as the X direction) as an axis, and the rotation of the top plate 102 in a direction with the short direction (hereinafter referred to as the Y direction) as an axis. , Support device moving mechanism 120 that slides in the X direction, and the top plate 102, the top plate 102 is moved vertically in the direction perpendicular to the floor surface 1 (hereinafter Z direction), and the Y direction Move the top plate to slide Structure 110, top plate 102, X-ray source 103, X-ray diaphragm device 104 and X-ray detector 105, while maintaining the relative position of the top plate 102 with respect to the floor 1 while maintaining the relative position of the top plate 102, A support column 112 standing on the floor 1 and supporting the top plate tilting mechanism 111, an X-ray source 103, an X-ray diaphragm device 104, and an X-ray detection unit 105 moved by the support moving mechanism 120 and the top plate moving mechanism 110. And a position detector 113 for detecting the positional relationship between the top plate 102, a high voltage generator 114 for supplying power to the X-ray source 103, and image processing on the X-ray signal output from the X-ray detector 105a. The image processing unit 115 to perform, the image storage unit 116 that stores the X-ray image output from the image processing unit 115, the display device 117 that displays the X-ray image image-processed by the image processing unit 115, and each of the above components A control unit 118 that controls the elements and an operation unit 119 that gives commands to the control unit 118 are provided. The XYZ directions are orthogonal to each other.

  The X-ray source 103 has an X-ray tube that receives power supply from the high voltage generator 114 and generates X-rays. Further, the X-ray source 103 may have an X-ray filter that selectively transmits X-rays having specific energy.

  The X-ray diaphragm device 104 has a plurality of lead plates for shielding X-rays generated from the X-ray source 103, and irradiates the subject 101 by moving the plurality of lead plates for shielding X-rays, respectively. Determine the X-ray irradiation area.

  The X-ray detector 105 includes an X-ray detector 105a, an X-ray detector moving mechanism 105b, and an X-ray detector distance measurement sensor 105c. The X-ray detector 105a includes, for example, a plurality of X-ray detectors. The detection elements are arranged in a two-dimensional array, and are devices that detect an X-ray signal corresponding to an incident amount of X-rays irradiated from the X-ray source 103 and transmitted through the subject 101. The X-ray detector moving mechanism 105b changes the distance from the X-ray source 103 by moving the position of the X-ray detector 105a.

  For example, as shown in FIG. 1, when the X-ray source 103 and the X-ray detection unit 105 face each other in the Z direction across the top plate 102, the X-ray detector moving mechanism 105b Next, the position of the X-ray detector 105a is moved. The position of the X-ray detector 105a moved by the X-ray detector moving mechanism 105b is detected by the position detector 113. The moving mechanism of the X-ray detector 105a is implemented by a known technique such as a rack and pinion.

  The X-ray detector distance measurement sensor 105c prevents, for example, a collision between the X-ray detector 105a and the subject 101 on the top plate 102 when the X-ray detector 105a is moved by the X-ray detector moving mechanism 105b. Sensor for measuring the distance to an object approaching the X-ray detector 105a. The X-ray detector distance measuring sensor 105c is configured by, for example, infrared rays or ultrasonic waves. The value measured by the X-ray detector distance measuring sensor 105c is transmitted to the control unit 118. Further, it goes without saying that the X-ray detector distance measuring sensor 105c also operates when the X-ray detector 105a moves in accordance with the movement of the support 106 described later.

  The support device 106 is C-shaped, and an X-ray source 103 and an X-ray diaphragm device 104 are set at one end portion of the support device 106 and an X-ray detection unit 105 is set at the other end portion. The shape of the support device 106 is not limited to a C shape, and may be any shape as long as the X-ray source 103 and the X-ray diaphragm device 104 and the X-ray detection unit 105 can be arranged to face each other with the top plate 102 interposed therebetween.

  The support device moving mechanism 120 includes a support device rotation mechanism 107, a support device rotation mechanism 108, and a support device slide mechanism 109. The support device rotation mechanism 107 supports the support device 106, and includes an X-ray source 103 and an X-ray diaphragm. The device 104 and the X-ray detection unit 105 are rotated about the X direction, and the support device rotation mechanism 108 supports the support device rotation mechanism 107, and the X-ray source 103 and the X-ray diaphragm device 104 The X-ray detection unit 105 is rotated about the Y direction. Further, the support slide mechanism 109 includes a slide rail 109b extending in the X direction, and a slide mechanism 109A that runs on the slide rail 109b and supports the support rotation mechanism 108, and includes an X-ray source 103 and an X-ray diaphragm. The apparatus 104 and the X-ray detection unit 105 are slid in the X direction. That is, the X-ray source 103, the X-ray diaphragm 104, and the X-ray detector 105 can be slid along the body axis direction of the subject 101 on the top plate 102.

Top plate moving mechanism 110 includes a top plate vertically moving mechanism 110 a, includes a top plate horizontal movement mechanism 110b, a top plate 102 with the top plate vertically moving mechanism 110 a is installed at the ends of the sliding mechanism 109 a Is a mechanism that moves the Z in the Z direction. Further, the top plate horizontal movement mechanism 110b is a mechanism that is supported by the top plate vertically moving mechanism 110 a to move the top board 102 in the Y direction.

  The image processing unit 115 performs image processing on the X-ray signal output from the X-ray detector 105a, and outputs an image-processed X-ray image. Image processing includes gamma conversion, gradation conversion processing, image enlargement / reduction, and the like. The image processed by the image processing unit 115 is output to the image storage unit 116 and the display device 117.

  The display device 117 displays various images stored in the image storage unit 116 in addition to the various images output from the image processing unit 115.

  The operation unit 119 includes a keyboard, a mouse, a joystick, and the like, and instructs the control unit 118.

Next, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5 and FIG.
FIG. 2 is a diagram for explaining types of positional relationships among the X-ray source 103, the X-ray diaphragm device 104, the X-ray detection unit 105, and the top plate 102 in the X-ray fluoroscopic apparatus shown in FIG. It is. FIG. 3 shows an X-ray source 103 and an X-ray diaphragm device 104 for obtaining a fluoroscopic image in the body axis direction for the subject 101 on the top plate 102 in the X-ray fluoroscopic apparatus shown in FIG. FIG. 6 is a diagram for explaining an operation with the X-ray detection unit 105. FIG. 4 is a diagram for explaining the operation of the X-ray detection unit 105 when acquiring a fluoroscopic image and a captured image. FIG. 5 is a flowchart for explaining the present embodiment. FIG. 10 is a functional block diagram for explaining the present embodiment.

  FIG. 2 (a) simply shows the positional relationship between the X-ray source 103 and the X-ray diaphragm device 104, the X-ray detection unit 105, and the top plate 102 shown in FIG. An X-ray source 103 and an X-ray diaphragm device 104 are disposed on the back surface side, and an X-ray detection unit 105 is disposed on the surface of the top plate 102 (surface on which the subject 101 is disposed). This arrangement is called an undertube. On the other hand, FIG. 2 (b) shows the back side of the top plate 102 by rotating the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 around the X direction by the support rotating mechanism 107. The X-ray detection unit 105 is disposed on the surface, and the X-ray source 103 and the X-ray diaphragm device 104 are disposed on the surface. This arrangement is called an overtube. Hereinafter, this embodiment will be described in detail using the case of an undertube.

  When acquiring a fluoroscopic image along the body axis direction of the subject 101 on the top plate 102, the operator uses the operation unit 119 to instruct the control unit 118 to acquire the fluoroscopic image. Do. Based on the command, the control unit 118 slides the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 in the body axis direction of the subject 101 using the support slide mechanism 109. At the time of acquiring a fluoroscopic image, the X-ray dose irradiated to the subject 101 is smaller than that at the time of acquiring a captured image described later. This is for grasping the photographing position when acquiring a photographed image for viewing the region of interest of the subject 101 in more detail. Therefore, the X-ray dose required for grasping the position is limited to the subject. 101 exposure reduction. The X-ray dose is performed by controlling the output of the high voltage generator 114 that supplies power to the X-ray source 103. The output value of the high voltage generator 114 can be arbitrarily set within a predetermined range using a value set in the control unit 118 in advance or the operation unit 119 by the operator.

  In FIG. 3, a perspective image of the subject 101 is acquired from point A to point C. At this time, the operator can use the display device 117 to see the fluoroscopic image. The operator uses the perspective image displayed on the display device 117 to specify the region of interest of the subject 101 for which a captured image is to be acquired. For example, when the region of interest is point B, the operator uses the operation unit 119 to instruct the control unit 118 to acquire a captured image. Based on the command, the control unit 118 causes the X-ray detector moving mechanism 105b to bring the X-ray detector 105a close to the vicinity of the subject 101 and then performs imaging. This will be described in more detail with reference to FIGS. 4 and 5. FIG.

  The diagram shown in FIG. 4 (a) shows details of the positional relationship among the X-ray source 103, the X-ray diaphragm 104, the X-ray detector 105, and the subject 101 at the time of obtaining a fluoroscopic image at the point B. . The distance between the X-ray source 103 and the X-ray detection unit 105 is L1, and the distance from the X-ray detection unit 105, more specifically, the X-ray detector 105a to the front part of the body of the subject 101 is L2. . On the other hand, the diagram shown in FIG. 4 (b) shows the details of each positional relationship when a captured image is acquired at the point B. The control unit 118 that has received an imaging image acquisition command from the operator at the point B causes the X-ray detector moving mechanism 105b to bring the X-ray detector 105a close to the vicinity of the subject 101, and from the X-ray detector 105a to the subject 101. Reduce the distance to the body surface from L2 to L4. The distance between the X-ray source 103 and the X-ray detector 105 is shortened from L1 to L3. There is no change in the positional relationship between the subject 101 and the X-ray source 103. Further, when the X-ray detector 105a is brought close to the vicinity of the subject 101, the control unit 118 uses the value measured by the X-ray detector distance measurement sensor 105c to make the X-ray detector 105a as far as possible. It is close to the vicinity of 101.

  Here, the enlargement ratio will be described. When an image obtained by irradiating the subject 101 with X-rays is separated from the region of interest of the subject 101 and the X-ray detector 105a, transmitted X-rays transmitted through the region of interest are detected by X-ray detection. Since the image is spread before reaching the vessel 105a, the acquired image is enlarged from the actual region of interest, and the dose density in the X-ray space becomes sparse, which causes blurring of the acquired image. A high-quality image can be acquired by minimizing the enlargement ratio of the image generated by the distance between the region of interest of the subject 101 and the X-ray detector 105a.

In the present embodiment, the purpose of acquiring the fluoroscopic image is to grasp the captured image acquisition position, so it is sufficient if an image having a certain level of image quality can be acquired. Therefore, when obtaining a fluoroscopic image, the object is examined using the support slide mechanism 109 while the distances between the X-ray source 103 and the X-ray diaphragm device 104, the X-ray detection unit 105, and the top plate 102 are kept constant. 101 slides in the body axis direction. If, necessary when obtaining a high-quality image to minimize the even magnification during fluoroscopic image acquisition a successive approximation following the undulations of the body surface of the subject 101, thereby moving operation the position of the X-ray detector 105a Therefore, very complicated control is required and traveling time is also required.

Next, an example of the operation order of the present embodiment will be described with reference to the flowchart of FIG.
In step S501, the operator moves the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 to the fluoroscopic image acquisition start position using the support movement switch 1001 provided in the operation unit 119. Next, in step S502, the operator uses the fluoroscopic image acquisition start switch 1002 provided in the operation unit 119 to start irradiating the subject 101 with a preset X-ray dose from the X-ray tube 103. Next, in step S503, the operator starts sliding movement of the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 in the body axis direction of the subject 101 using the support movement switch 1001. . At this time, the operator can also use the supporter movement switch 1001 to pause the slide movement. Next, in step S504, the operator determines whether or not it is a desired shooting position from the fluoroscopic image displayed on the display device 117. If it is determined that the photographing position is desired, the process proceeds to step S505, and if not, the process proceeds to step S507 described later. Next, in step S505, the operator uses the supporter movement switch 1001 to stop the slide movement and presses the photographed image acquisition switch 1003 provided in the operation unit 119.

  In addition, when the photographed image acquisition switch 1003 is pressed, the slide movement by the supporter movement switch 1001 becomes impossible, and the malfunction of the supporter movement switch 1001 by the operator is prevented. Next, in step S506, the control unit 118 uses the X-ray detector moving mechanism 105b and the X-ray detector distance measurement sensor 105c to perform imaging by bringing the X-ray detector 105a close to the vicinity of the subject 101, and ends the imaging. Thereafter, the X-ray detector 105a is returned to the original position, and the slide movement by the supporter movement switch 1001 is made possible again. Whether or not the slide movement by the supporter movement switch 1001 is valid is notified to the operator by turning on and off a display lamp (not shown) provided in the operation unit 119. After step S506 ends, the process returns to step S503. Next, in step S507, the operator determines whether or not the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 have reached the fluoroscopic image acquisition end position. If it has reached the fluoroscopic image acquisition end position, the process proceeds to step S508; otherwise, the process returns to step S503. Next, in step S508, the operator ends fluoroscopy using the fluoroscopic image acquisition end switch 1004 provided in the operation unit 119.

  As described above, according to the X-ray fluoroscopic apparatus of the present embodiment, when acquiring a captured image with a reduced magnification of the subject 101, the operator can use the fluoroscopic image of the subject 101 displayed on the display device 117. Just by setting the captured image acquisition position, the control unit 118 uses the X-ray detector moving mechanism 105b and the X-ray detector distance measurement sensor 105c to move the X-ray detector 105a to the vicinity of the subject 101 and perform imaging. Therefore, the operator can easily obtain a high-quality captured image with a reduced magnification.

  In addition, the case where the fluoroscopic image is acquired in the body axis direction of the subject 101 with the undertube has been described. In this embodiment, the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection when acquiring the fluoroscopic image are described. The arrangement position and moving direction of the unit 105 can be implemented without any particular limitation. For example, the present invention can be implemented even in the case of an overtube or when the periphery of the subject 101 is seen through with the X direction as the rotation axis. In the present embodiment, the operator moves the X-ray source 103, the X-ray aperture device 104, and the X-ray detection unit 105 in the body axis direction of the subject 101 by using the support moving switch 1001, and acquires a fluoroscopic image. However, after the operator has set the fluoroscopic image acquisition start position and the fluoroscopic image acquisition end position in advance, the control unit 118 may perform sliding movement. In this case, the process related to shooting by the operator is interrupted with respect to the slide movement by the control unit 118. As a result, it is not necessary to operate the supporter movement switch 1001 during slide movement when acquiring a fluoroscopic image, so that the burden on the operator is reduced.

  Next, Embodiment 2 of the present invention will be described with reference to FIGS. Further, differences from the first embodiment will be described.

  FIG. 6 is a diagram for explaining the operation of the fluoroscopic imaging apparatus when there are a plurality of regions of interest for which a captured image is to be acquired. FIG. 7 is a view showing an example of a shooting reservation screen displayed on the display device 117. FIG. 8 is a diagram illustrating an example of a display screen displayed on the display device 117 when shooting is performed based on a shooting reservation. FIG. 9 is a flowchart for explaining the present embodiment.

  FIG. 6 (a) is the same diagram as FIG. 3, and is a diagram in which a fluoroscopic image is acquired from point A to point C in the body axis direction of the subject 101. FIG. The X-ray fluoroscopic apparatus of the present embodiment is particularly effective when there are a plurality of places where it is determined that the operator wants to acquire a captured image. In this embodiment, the operator performs a fluoroscopy from the point A to the point C in the body axis direction of the subject 101, and at this time, the radiographed image of the subject 101 displayed on the display device 117 is seen to be a captured image. The position is memorized by using the photographing reservation function at the point where it is determined that the image acquisition is desired, and the photographing reservation is performed.

  At this time, the positions of the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 are detected by the position detection unit 113. The imaging reservation is performed by the operator using the operation unit 119, and the perspective image of the reserved point is reduced to the side of the currently acquired fluoroscopic image 701 and displayed as the imaging reservation image 702 as shown in FIG. The operator can grasp the reserved shooting position and the number of shots by looking at the shooting reservation image 702. When the fluoroscopy and the photographing reservation are completed from the point A to the point C, the control unit 118 starts photographing based on the photographing reservation.

  FIG. 6B shows the operation of the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 when the imaging reservation points are the points A and B. Since the operations of the X-ray detector 105a and the like at the time of imaging are the same as those in the first embodiment, description thereof is omitted. When the X-ray source 103, the X-ray aperture device 104, and the X-ray detection unit 105 arrive at the reserved imaging point, for example, the point B, the control unit 118 displays on the display device 117 as shown in FIG. The shooting start display 801 is flashed around the reserved shooting image 702 at the point B with a red frame or the like. After that, the control unit 118 performs imaging by operating the X-ray detector 105a and the like in the same manner as in the first embodiment. When the shooting is completed, the control unit 118 displays the acquired captured image 802 on the display device 117, and further replaces the reserved shooting image displayed on the display device 117 with a reduced captured image 803 obtained by reducing the captured image 802. To display. At this time, as shown in FIG. 8B, a photographing end display 804 is displayed around the reduced photographed image 803 with a blue frame line or the like. By displaying the shooting start display 801, the reduced shooting image 803, and the shooting end display 804 on the display device 117, the operator can easily grasp the shooting image acquisition status.

  In this embodiment, the shooting start display 801 and the shooting end display 804 are displayed by frame lines, but the present invention is not limited to this. For example, the reduced photographed image 803 may be displayed using a mark or the like.

  Next, an example of the operation sequence of the present embodiment will be described with respect to differences from the first embodiment with reference to the flowchart of FIG.

  In step S905, the operator presses a photographing image reservation switch (not shown) provided in the operation unit 119 to make a photographing reservation. Next, in step S906, the control unit 118 displays the currently acquired fluoroscopic image 701 on which the imaging reservation has been made on the display device 117 as the imaging reservation image 702. In step S909, the control unit 118 starts shooting based on the shooting reservation. The acquired photographic image is displayed on the display device 117, and a reduced photographic image 803 obtained by reducing the photographic image is displayed. When all reserved photographic images are acquired, a display indicating the end of shooting is displayed on the display device 117.

  As described above, according to the X-ray fluoroscopic imaging apparatus of the present embodiment, when acquiring captured images with a reduced magnification rate of the subject 101 at a plurality of locations, the operator can display the subject 101 displayed on the display device 117. Since the control unit 118 sequentially acquires captured images based on the reserved imaging simply by making a reservation for imaging from the fluoroscopic image, the operator can easily acquire high-quality captured images with reduced magnification at multiple locations. Can do.

  Similarly to the first embodiment, the arrangement position and the moving direction of the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105 when acquiring a fluoroscopic image are not particularly limited. Further, regarding the movement operation of the X-ray source 103, the X-ray diaphragm device 104, and the X-ray detection unit 105, similarly to the first embodiment, after the operator has previously set the fluoroscopic image acquisition start position and the fluoroscopic image acquisition end position, The slide may be performed by the control unit 118.

  1 Floor, 2 Ceiling, 101 Subject, 102 Top plate, 103 X-ray source, 104 X-ray diaphragm, 105 X-ray detector, 105a X-ray detector, 105b X-ray detector moving mechanism, 105c X-ray Detector distance measurement sensor, 106 Support device, 107, 108 Support device rotation mechanism, 109 Support device slide mechanism, 109A Slide mechanism, 109b Slide rail, 110 Top plate movement mechanism, 110A Top plate vertical movement mechanism, 110b Top plate horizontal movement Mechanism, 111 Top plate tilting mechanism, 112 support, 113 position detection unit, 114 high voltage generator, 115 image processing unit, 116 image storage unit, 117 display device, 118 control unit, 119 operation unit, 120 support movement Mechanism, 701 perspective image, 702 reserved image, 801 shooting start display, 802 shooting image, 803 reduced shooting image, 804 shooting end display, 1001 support movement switch, 1002 fluoroscopic image acquisition start switch, 1003 shooting image acquisition switch, 1004 Fluoroscopic image acquisition end switch

Claims (4)

A top plate for placing the subject, an X-ray source for irradiating the subject with X-rays, an X-ray diaphragm for setting an X-ray irradiation region for irradiating the subject with X-rays, and the X-ray by a support and X-ray detector are sources disposed opposite detecting transmitted X-rays of the subject, to support the supporting device, the X-ray source, a support unit moving mechanism for moving the X-ray beam limiting device and the X-ray detector In an X-ray fluoroscopic apparatus comprising: an image processing unit that converts transmitted X-rays output from the X-ray detector into an X-ray image; and a display device that displays the X-ray image.
An X-ray detector moving mechanism that varies the distance between the X-ray detector and the X-ray detector by moving the X-ray detector ;
An X-ray detector distance measuring sensor for measuring the distance between the subject and the X-ray detector ,
The support moving mechanism moves the support that supports the X-ray source and the X-ray detector in one direction, acquires a fluoroscopic image of the subject,
The display device includes an imaging reservation function for displaying the acquired fluoroscopic image and storing an imaging position of the subject desired by an operator based on the displayed fluoroscopic image,
The support device moving mechanism moves the support device in a direction opposite to the one direction, acquires a captured image of the subject based on an imaging position stored in the imaging reservation function,
The X-ray detector moving mechanism uses the measurement value obtained by the X-ray detector distance measuring sensor to determine the position of the X-ray detector from the first position where the fluoroscopic image of the subject is acquired. An X-ray fluoroscopic imaging apparatus, wherein the X-ray fluoroscopic imaging apparatus is moved to a second position where the captured image having a small magnification with respect to the image is acquired. In the X-ray fluoroscopic apparatus according to claim 1 ,
X-ray fluoroscopy, wherein a radiographed image is generated based on a fluoroscopic image acquired at the position of the X-ray detector stored by the radiographing reservation function, and the radiographed image is displayed on the display device Shooting device. In the X-ray fluoroscopic apparatus according to claim 2 ,
An X-ray fluoroscopic imaging apparatus that displays at least one of acquisition start and acquisition end of the captured image on the display device. An X-ray source that irradiates the subject with X-rays, an X-ray detector that is disposed opposite to the X-ray source and detects transmitted X-rays of the subject, and supports the X-ray source and the X-ray detector An X-ray fluoroscopic imaging method using an X-ray fluoroscopic imaging apparatus having a support and an X-ray detector distance measuring sensor for measuring a distance between the subject and the X-ray detector,
A step of irradiating the subject with X-rays from an X-ray source while detecting the transmitted X-rays from the subject by an X-ray detector at a first position while moving the support device in one direction and acquiring a fluoroscopic image Storing the imaging position of the subject desired by an operator using the acquired fluoroscopic image , moving the support device in a direction opposite to the one direction, and measuring the X-ray detector distance. The step of moving the position of the X-ray detector from the first position where the fluoroscopic image is acquired to a second position where the magnification is smaller than the fluoroscopic image , using a measurement value by a sensor. And a step of acquiring a captured image of the subject at the second position.

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