WO2000065998A1

WO2000065998A1 - X-ray imaging apparatus

Info

Publication number: WO2000065998A1
Application number: PCT/JP2000/002817
Authority: WO
Inventors: Seiji Kamimura; Isamu Takekoshi; Tsutomu Suzuki; Hiroshi Takagi; Takaaki Kobiki
Original assignee: Hitachi Medical Corporation
Priority date: 1999-04-30
Filing date: 2000-04-28
Publication date: 2000-11-09
Also published as: JP2000312674A; CN1353593A; CN1210001C

Abstract

An X-ray imaging apparatus comprising an annular holder whose radial direction is perpendicular to the floor, an annular rotary body held rotatably along the inner peripheral surface of the holder, X-ray sources disposed in radially opposed positions on the inner peripheral surface of the rotary body, and flat-panel two-dimensional X-ray sensor, wherein the rotary body is rotated to acquire X-ray image data collected omnidirectionally from a subject positioned in the space in the rotary body. The X-ray imaging apparatus is excellent in space factor of when the X-ray tube or the two-dimensionally X-ray sensor rotates.

Description

Technical field

The present invention relates to an X-ray imaging apparatus, and more particularly to a method capable of generating three-dimensional image data and using the same in a treatment called IV Ming R (interventional radiology: catheter surgery under X-ray fluoroscopy). It relates to a suitable X-ray imaging apparatus. Background art

An X-ray CT (computerized tomography) apparatus is generally known, and such an X-ray CT apparatus generally has a box-shaped gantry housing as shown in FIG. In the center of 01, a tunnel-shaped hollow section 502 is provided, and in this hollow section 502, the subject 505 lying on a bed 503 with a bed 503 that can move back and forth is placed. When a part of the body is inserted, an X-ray tube (not shown) and an arc-shaped linear X-ray detector (not shown) disposed on the opposed inner peripheral wall of the cavity 502 are synchronously rotated to obtain the subject 5005. An X-ray image of the part to be inspected from all directions is obtained, and a tomographic image of the part to be inspected is generated based on this. Then, by appropriately step-feeding the top plate 504 (that is, by step-feeding the inspection site of the subject 505), the tomogram of the inspection site of the subject 505 is obtained. It is also possible to obtain a plurality of images and generate a three-dimensional image of the part to be inspected based on this as needed. In addition, instead of the linear X-ray detector, an X-ray image intensifier that is a two-dimensional X-ray detector was used, and the inspection was performed by rotating the X-ray tube and X-ray image intensifier once. There is also known a method of generating three-dimensional image data of a region to be inspected from X-ray image data from all directions around the part. Such an X-ray CT device is very effective for confirming the position and shape of the treatment target site, but is not suitable for performing an IVR procedure. What is necessary is that there is a need for the patient's treatment site to enter the cavity 502 of the gantry housing 501, so that the practitioner and assistant can provide space for smooth treatment, It becomes difficult to secure a space for installing the instruments that need to be worn on the patient.If the patient's head is in the cavity 502, observe the patient's facial expression during surgery. This is because a sudden change in the condition cannot be known, and further, the gantry housing 501 has a considerable thickness, giving a feeling of oppression to the patient.

Therefore, conventionally, after diagnosing with the above-described X-ray CT apparatus, IVR has been performed using an X-ray imaging apparatus as shown in FIG. In FIG. 12, reference numeral 61 denotes a base member, reference numeral 603 denotes a base arm attached to the base member 601 so as to be rotatable around a rotation support shaft 602, 604 is an arc-shaped holder attached to the tip of the base arm 603, and 605 is held by the holder 604 and can rotate and slide by a predetermined amount along the holder 604. There is a C-arm, 606 is an X-ray tube attached to one end of the C-arm 605, and 607 is a two-dimensional X attached to the other end of the C-arm 605 A line detector, 608 is a bed, 609 is a bed 608 top plate, and 610 is a subject lying on the top plate 609.

In the X-ray imaging apparatus shown in Fig. 12, the position of the subject 610 to be inspected is placed between the X-ray tube 606 and the two-dimensional X-ray detector 607. By rotating the base arm 603 in the direction of the arrow M as necessary, and rotating the C-arm 605 in the direction of the arrow N as necessary, the subject It is designed to obtain a two-dimensional X-ray image from an arbitrary angle of the examination site. Therefore, when performing IVR, the practitioner views the 2D X-ray image of the patient's treatment target while viewing the 2D X-ray image on the monitor screen in the operating room. Operation), and it is relatively easy to secure space for practitioners and assistants to perform smooth treatment, and to install space for devices that need to be worn by patients. It is also possible to observe the patient's facial expressions during the operation.

However, the X-ray imaging device shown in Fig. 12 is not a device for obtaining an X-ray CT, but only a two-dimensional X-ray image. There is a problem that it is not possible to intuitively grasp the shape and the positional relationship between the treatment target site and the treatment instrument attached to the tip of the force table.

Here, also in the X-ray imaging apparatus shown in FIG. 12 described above, the C-shaped arm 605 (the X-ray tube 606 and the two-dimensional X-ray detector 607) is rotated by 360 °. However, it is theoretically possible to obtain X-ray image data from all directions around the inspected part of the subject and generate a three-dimensional image data of the inspected part based on the X-ray image data. However, in this case, in the configuration shown in FIG. 12, the space occupied by the trajectory of the member rotating 360 ° becomes large, and the space factor in the operating room is impaired. Furthermore, since the span L2 from the base member 601 to the tip of the C-shaped arm 605 is large, the structural member is located at the center position between the X-ray tube 606 and the two-dimensional X-ray detector 607. There is also a problem that the displacement due to the bending of the image causes the image quality of the reconstructed 3D image, that is, the spatial resolution to decrease.

(For example, as described in ^r SPIE-The International Society for Optical Engineering Vol. 2708, PP361-370, 1996j, three-dimensional image data is corrected after correcting the center position deviation for each X-ray image. Reconstruction has to be performed, which increases the amount of calculation and causes a problem that three-dimensional image data cannot be obtained quickly).

Accordingly, the applicant of the present application has proposed an X-ray imaging apparatus that can generate three-dimensional image data and is suitable for application to IVR. No. 6 238 was proposed. FIG. 13 is a diagram showing the X-ray imaging apparatus described in the earlier application.

In FIG. 13, reference numeral 700 denotes a base member provided with a circular through hole, and reference numeral 720 denotes a base member held so as to be rotatable along the inner peripheral surface of the through hole of the base member 71. The rotating body, 703 is the first arm on the rotating body 701

An X-ray tube attached via 704, a 705 is a two-dimensional X-ray detector (X-ray image intensifier) attached to a rotating body 701 via a second arm 706 Or flat panel type two-dimensional X-ray detector), Ί07 is a bed, and 708 is a top plate of a bed 707.

In the X-ray imaging apparatus shown in FIG. 13, a part to be inspected of a subject (not shown) lying on a top plate 708 is detected by an X-ray tube 703 and a two-dimensional X-ray detector. With the rotator 70 2 (that is, the X-ray tube 703 and the two-dimensional X-ray detector 705) placed between the detector 705 and the rotating body 7 By rotating by 0 °, X-ray image data from the entire circumference of the inspected part of the subject is obtained, and based on this, it is possible to generate a three-dimensional image of the inspected part. In addition, when performing IVR, the practitioner can see most of the patient's body, easily observe the patient's facial expressions, etc. during the operation, and the practitioner and assistants can smoothly It is also easy to secure space for treatment and mounting space for devices that need to be worn on the patient. In addition, the span L 1 from the base member 70 1 to the end of the imaging system can be made much shorter than the configuration shown in FIG. 12, so that the X-ray tube 703 and the two-dimensional X-ray detector There is almost no displacement at the center position with respect to 705 due to the bending of the structural member, and the image quality of the reconstructed three-dimensional image, that is, the spatial resolution is good.

As described above, in the technology previously proposed by the present applicant as Japanese Patent Application No. 10-30662 (hereinafter simply referred to as a prior application), a three-dimensional image is generated. X-ray equipment that can be used and is suitable for IVR P

Five

It can be.

However, in the X-ray imaging apparatus according to the prior application, since the X-ray tube 703 attached to the arm and the two-dimensional X-ray detector 705 protrude from the rotating body 702, the movement trajectory is reduced. There is a point that is difficult to understand. Further, in the X-ray imaging apparatus according to the prior application, since a control panel or the like for performing various controls and arithmetic processing is built in the base member 701, the thickness ( There is naturally a limit to reducing the through-hole axial dimension), and the X-ray tube 703 and the two-dimensional X-ray detector 705 protrude from the rotating body 704. However, there are certain limits to further miniaturizing the components installed for the subject. Further, in the X-ray imaging apparatus according to the prior application, it is possible to obtain a two-dimensional X-ray image of a part to be inspected (a part to be treated by a patient) at an arbitrary desired angle during IVR. Care was not taken. Disclosure of the invention

The present invention has been made in view of the above points, and an object of the present invention is to provide an X-ray imaging apparatus having an excellent space factor when an X-ray source or a two-dimensional X-ray detector rotates. is there. Another object of the present invention is to provide an X-ray imaging apparatus excellent in space factor, in which components to be installed on a subject are flattened. Further, an object of the present invention is to provide an X-ray imaging apparatus capable of obtaining a two-dimensional X-ray image of a part to be inspected (a part to be treated by a patient) at an arbitrary desired angle. To provide.

In a typical example of the X-ray imaging apparatus according to the present invention, a holding member arranged so that its radial direction is perpendicular to a floor surface, and a rotatable holding member along a peripheral surface of the holding member are provided. And an X-ray source and a two-dimensional X-ray detector respectively arranged at radially opposed positions on the inner periphery of the rotating body. The rotating body is rotated so that X-ray image data of the subject located in the space inside the rotating body from all directions can be acquired. Preferably, the holder is annular, the rotator is rotatably held along the inner peripheral surface of the holder, and the two-dimensional X-ray detector is a flat panel type two-dimensional X-ray detector. You.

In addition, a plurality of ring-shaped conductors are disposed on one of the inner peripheral surface side of the holding body and the outer peripheral surface side of the rotating body, and the other is a conductive brush that slides relatively with the ring-shaped conductor. Signal transmission and reception between the X-ray source and X-ray detector and the control panel, which is located outside the holder and rotating body, and performs various controls and arithmetic processing. It is configured to be performed via a conductor and a conductive brush.

In addition, the holding body is held in a cantilever manner by holding a center of one side thereof on a supporting pillar standing upright with respect to the floor surface, and the holding body is supported by a supporting pillar. The virtual circular plane of the rotating body is held by rotating the holding body and the rotating body integrally with the rotating shaft supporting section as a rotation center, while being held rotatably about the horizontal rotation shaft support provided on the body. It is configured to be tiltable with respect to a plane perpendicular to the floor.

The lower part of the support pillar is connected to the base arm body, and the base arm body is held on the floor so as to be horizontally rotatable at a position facing the center of the lower part of the holding body, and the base arm body is By rotating, the support pillar, the holding body, and the rotating body are configured to rotate integrally about a vertical rotation axis passing through the center point of the rotating body as a center of rotation. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing a configuration of an X-ray imaging system using an X-ray imaging apparatus according to a first embodiment of the present invention.

FIG. 2 shows an X-ray apparatus according to the first embodiment of the present invention in a reference position state. FIG.

FIG. 3 is a perspective view when the X-ray imaging apparatus according to the first embodiment of the present invention is in a reference position state.

FIG. 4 is a cross-sectional front view of the X-ray imaging apparatus according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional side view of the X-ray imaging apparatus according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of an X-ray imaging system using an X-ray imaging apparatus according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram when the X-ray imaging apparatus according to the second embodiment of the present invention is in the reference position state.

FIG. 8 is an explanatory diagram when the X-ray imaging apparatus according to the second embodiment of the present invention is in the reference position state.

FIG. 9 is a sectional view of an X-ray imaging apparatus according to a second embodiment of the present invention. FIG. 10 is a perspective view of an X-ray imaging apparatus according to a third embodiment of the present invention.

FIG. 11 is a perspective view of a conventional X-ray CT apparatus.

FIG. 12 is a perspective view of a conventional X-ray imaging apparatus.

FIG. 13 is a perspective view of a conventional X-ray imaging apparatus. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is an X-ray imaging device, 2 is a bed, 3 is a console with a display device 4, and 5 is a control panel (control box). In the X-ray imaging system according to this example, the console 3 with the display 4 and the control panel 5 are installed in the operating room. It is located in a separate room with windows overlooking the X-ray equipment 1 and the bed 2 that are installed. Although not shown, a display device that can display image data obtained by appropriately processing X-ray image data obtained by the X-ray imaging device 1 is provided in an operating room at a position where the practitioner and assistant can easily see the image data. Are installed. In addition, the console 3 and the control panel 5 with the display device 4 can be installed in the operating room, or the operating room can be monitored with a TV camera, and it is completely isolated from the operating room. It may be provided in the control room.

The control panel 5 includes a mechanical drive control unit for driving and controlling each drive source, which will be described later, built in the X-ray imaging apparatus 1 and the bed 2 and a mechanism drive control unit installed in the X-ray imaging apparatus 1 which will be described later. X-ray imaging system control unit for X-ray source and 2D X-ray detector, image processing unit for image processing, main control unit for overall control of the entire system, and power supply unit if necessary Have been. Then, by operating the console 3, the drive sources of the X-ray imaging apparatus 1 are drive-controlled to cause the X-ray imaging apparatus 1 to take a desired posture, and to rotate the rotating body of the X-ray imaging apparatus 1 described later. The top plate 6 is rotated by rotating it, taking an X-ray image of the part to be inspected by the X-ray imaging system, or by driving and controlling a drive source (not shown) of the bed 2 as shown in FIG. The arrow moves in the direction of A. Furthermore, the operation of the console 3 causes the image processing unit to generate a three-dimensional image based on the X-ray image data obtained by the X-ray imaging system, or the three-dimensional image output from the image processing unit. The display of the image data or the two-dimensional image data is displayed on the display device in the operating room or the display device of the console 3.

In the X-ray imaging apparatus 1 of the present embodiment shown in FIG. 1, Ί is a substantially L-shaped holding member as viewed from the front, and has a horizontal (parallel to the floor) base arm 8 and a base arm 8. The support column 9 vertically erected from one end is integrated, and the other end of the base arm 8 is rotatable on the floor. The rotating base 10 is provided to be held by the rotating base 10. Reference numeral 11 denotes a support block rotatably held on the side surface of the support column 9, and an annular holder 12 is fixed to the support block 11. Reference numeral 13 denotes an annular rotating body held by the holding body 12 so as to be rotatable along the inner circumferential surface of the holding body 12. The rotating body 13 is radially opposed to the inner circumferential surface of the rotating body 13. At the positions, an X-ray source 14 composed of an X-ray tube and a two-dimensional X-ray detector 15 composed of a flat panel type two-dimensional X-ray detector are provided, respectively.

In the X-ray imaging apparatus 1 of the present embodiment, with the above-described configuration, the rotating body 13 and the holding block 11 (and the holding body 12 and the rotating body 13) are moved in the arrow B direction with respect to the holding body 12. The holding member 7 is rotatable in the direction of arrow C with respect to the holding member 7, and the holding member 7 is rotatable in the direction of arrow D with respect to the floor surface. In the state shown in FIG. 1, the holding block 11 and the holding member 7 are It shows a state in which it has been rotated by a predetermined amount from the reference position.

In FIG. 1, the Y axis indicates the horizontal body axis direction of an unillustrated subject lying on the top 6, the X axis indicates a direction perpendicular and horizontal to the Y axis, and the Z axis indicates , The direction perpendicular to the floor surface. When the X-ray imaging apparatus 1 is at the reference position (standard state), the holding member 7 is in the state of being coincident with the direction of the X axis when viewed from above, and the holding block 11 (and the holding body 12 and The rotator 13) is located in the XZ plane.

FIGS. 2 and 3 are views showing the state of the X-ray imaging apparatus 1 when the X-ray imaging apparatus 1 is at the reference position. FIG. 2 (a) is a front view, and FIG. (B) is a plan view, FIG. 2 (c) is a right side view, FIG. 2 (d) is a left side view, FIG. 2 (e) is a bottom view, and FIG. 2 (f) is a FIG. 3 is a rear view, and FIG. 3 is a perspective view.

FIG. 4 is a cross-sectional front view of the X-ray imaging apparatus 1 when the X-ray imaging apparatus 1 is at the reference position (reference state). FIG. FIG. 2 is a cross-sectional side view of the X-ray imaging apparatus 1 in the (state). As shown in FIGS. 4 and 5, a part of the rotation base 10 of the base arm body 8 of the holding member 7 is formed by a hole provided in the floor 17 (or an anchor member embedded in the floor 17). The holding member 7 is rotatable about a rotation center axis P1 as a rotation center. Note that the rotation center axis P 1 passes through the center point 19 of the rotating body 13. Further, as shown in FIG. 5, a drive motor 20 for the holding member is provided in an appropriate hole of the floor 17, and an output pinion 21 of the drive motor 20 for the holding member rotates. It meshes with the gear 22 fixed to the base 10. Accordingly, the rotation of the holding member drive motor 20 causes the holding member 7 to rotate around the rotation center axis P1 and rotate in the direction of arrow D in FIG. 11, the holding body 12 and the rotating body 13 move integrally in the direction of arrow D in FIG. At this time, since the rotation center axis P 1 is configured to pass through the center point 19 of the rotating body 13, even if the holding member 7 rotates, the center point 19 of the rotating body 13 (in other words, Then, the reference center point of the imaging system composed of the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 does not shift at all.

Further, as shown in FIG. 4, the support pillar 9 of the holding member 7 has a drive module 23 for the holding block built therein, and the output of the drive module 23 for the holding block is provided. A member (for example, an output shaft of a gearbox provided with a reduction gear train) 24 is fixed to the holding block 11. The rotation center axis P 2 of the output member 24 passes through the center point 19 of the rotating body 13. Accordingly, by the rotation of the holding block drive motor 23, the holding work 11 rotates around the rotation center axis P2 and rotates in the direction of arrow C in FIG. The holding body 12 and the rotating body 13 also move together in the direction of arrow C (that is, the virtual circular plane of the rotating body 13 tilts with respect to a plane perpendicular to the floor surface). It has become) . At this time, since the rotation center axis P 2 is configured to pass through the center point 19 of the rotating body 13, Even if the holding block 11 rotates, the center point 19 of the rotating body 13 (in other words, the imaging system composed of the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15) The reference center point does not shift at all.

Also, as shown in FIG. 4, the holding block 11 has a built-in drive motor 25 for the rotating body, and the output pulley 26 of the drive motor 25 for the rotating body has a rotating body 1. It is connected to a pulley part 27 formed on a part of the outer periphery of 3 via a belt 28.

Therefore, by the rotation of the driving motor 25 for the rotating body, the rotating body 13 rotates along the inner peripheral surface of the annular holding body 12, whereby the rotating body 13 becomes the holding body 12 The center axis of the shaft is a rotation center axis P 3, and is rotated in the direction of arrow B in FIG.

As shown in FIG. 5, on the outer peripheral surface side of the rotating body 13 rotatably held by the holding body 12 via the bearing 29, in addition to the pulley portion 27, a number of A slip ring portion 30 made of a ring-shaped conductor is provided, and a conductive brush 31, which is in sliding contact with each ring-shaped conductor of the slip ring portion 30 and is always electrically connected, is provided with a holder. The conductive brush 31 is provided on the inner peripheral surface side of the holder 12 (an arbitrary position on the inner peripheral surface of the holder 12 may be used). The ring-shaped conductor of the slip ring part 30 is electrically connected to the X-ray source 14 attached to the rotating body 13 and the flat panel type two-dimensional X-ray detector 15. Each of the 1 independent contacts is connected to the control panel 5 via an appropriate connection code means.

That is, in the X-ray imaging apparatus 1 of the present invention, the rotating body 13 is provided with the X-ray source 14 and the flat panel in order to make the holding body 12 and the rotating body 13 as compact as possible. Equipped with only a type 2D X-ray detector 15, an X-ray imaging system necessary for X-ray imaging, and a circuit system such as an X-ray imaging control system, power supply system, or image processing system. All of them are removed from the X-ray equipment, and signals are exchanged between the X-ray imaging system and the control panel 5, and power from the external power supply circuit is supplied. The supply is performed through the slip ring section 30 and the conductive brush 31.

In the X-ray imaging apparatus 1 of the present embodiment having such a configuration, when obtaining three-dimensional image data of a subject to be inspected in the X-ray imaging apparatus 1, for example, The subject to be examined lying on the top board 6 of the bed 2 is positioned in the space inside the rotating body 13 by driving the top board 6 forward. At this time, the body axis (Y axis) of the subject is orthogonal to the plane (XZ plane) including the virtual circular plane of the rotating body 13, and the center position of the subject's part to be examined is The center point 19 of the rotating body 13 is made to substantially match.

By driving the rotating body driving module 25 in this state, the rotating body 13 is rotated by 360 ° while the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 are rotated. The two-dimensional XJ fountain image from the entire periphery of the part to be inspected by the subject is transmitted to the image processing unit of the control panel 5 from the flat panel type two-dimensional X-ray detector 15. Then, the image processing unit converts the two-dimensional image data into digital image data, and then sequentially stores the digital image data in the memory. Then, according to an operation instruction of the operator of the console 3, the image processing unit performs a known back-projection process or the like after performing a known correction process on the digital image data as necessary, thereby obtaining the three-dimensional image data. And store it in frame memory. In addition, in response to an operation instruction from the operator of the console 3, the image processing unit uses the two-dimensional X-ray image data from the entire circumference of the inspected part to perform the inspection of the inspected part by a known method similar to the above. Generate a CT image of the desired cross section—evening (tomographic image data) as necessary and store it in the frame memory. Techniques for generating these tomographic image data and 3D image data are known. For example, as a method for generating tomographic image data, an image construction calculation method called a convolution method is used. De-evening generation method is described in “LA Feldkampet al. Practical cone beam algorithm, J. Opt. Soc. Am. A, Vol. 1, No. 6, pp. 612-619, 1984 ”.

The three-dimensional image data stored in the frame memory or the tomographic image data of the predetermined cross section is displayed on the display device 4 of the console 3 or in a display (not shown) in the operating room according to an operation instruction of the operator of the console 3. Displayed on the device. This makes it possible for a doctor or the like to easily and reliably grasp the position and shape of the part to be treated with a three-dimensional image of the part to be inspected of the subject. By rotating or enlarging the three-dimensional image data, the position and shape of the treatment target site can be confirmed more reliably. In addition, since it is possible to refer to tomographic image data of a desired cross-section, more reliable diagnosis is possible.

After performing a diagnosis using a 3D image as described above, etc., when performing treatment with IVR, if necessary, the drive module for the holding member 20 and the drive module for the holding block may be used. Drive 23 is appropriately controlled so that holding member 7 is rotated in the direction of arrow D in FIG. 1 and holding block 11 is rotated in the direction of arrow C in FIG. An imaginary circular plane of the rotating body 12 is set to have an arbitrary left-right inclination angle or up-down inclination angle with respect to the body axis of the subject. In addition, the rotating body driving motor 25 is driven to position the rotating body 13 at a desired rotation position. In this state, by controlling the driving of the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15, two-dimensional image data from a desired angle of the treatment target part of the patient is obtained, and this is obtained in the operating room. Display on the display device in real time, and perform treatment by IVR.

Therefore, the practitioner or assistant can perform an accurate treatment while checking the two-dimensional image data of the treatment target site from a desired angle. In addition, since the holding member 7 and the holding block 11 can be rotated to an arbitrary position, the practitioner can stand at a position where the practitioner can easily perform treatment on the patient, and the annular holding member is provided. 1 2 and rotating body 1 3 do not interfere with treatment It is also possible to place it in a position. Furthermore, since the position of the center point 19 of the rotating body 13 is invariant in any position, the virtual circle plane of the rotating body 13 is It is also possible to obtain 3D image data and tomographic image data even in an IVR in which the left and right tilt angles and vertical tilt angles are set with respect to the body axis. The shape and the positional relationship between the part to be treated and the treatment instrument attached to the tip of the catheter can also be accurately visually recognized in real time.

Further, in the present embodiment, the body of the subject (patient) is opposed to the annular holding body 12 and the rotating body 13 whose thickness in the radial direction is thin and whose length in the axial direction is extremely short. Since it is partly inserted, it is possible to provide an X-ray imaging device that gives the subject (patient) a feeling of openness and security with extremely little pressure on the subject (patient). In addition, it is possible to easily and surely check the patient's facial expression during the operation. As described above, the reason why the radial thickness of the holding body 12 and the rotating body 13 can be reduced and the length in the axial direction can be made extremely short is as described above. By installing only the X-ray source 14 and the flat panel type 2D X-ray detector 15, the X-ray source X and the rotating body 13 do not have bulky circuit elements such as control circuits inside. It is configured so that the transmission and reception of signals to and from the outside and the power supply to and from the radiation source 14 and the flat panel type two-dimensional X-ray detector 15 are performed via the slip ring section 30 and the conductive brush 31 described above. Because he did.

In this embodiment, the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 are arranged on the inner peripheral surface of the rotating body 13. Unlike the prior art, the imaging system does not protrude from the rotating body in the radial direction, and therefore, high-quality 3D image data can be generated, and X-ray sources 14 and 2D X-ray detection The space factor when the container 15 rotates can be improved. Furthermore, in the present embodiment, a space for the practitioner or assistant to perform a smooth treatment and a space for mounting a device to be attached to the patient are secured by compacting the holding body 12 and the rotating body 13 described above. Since the weight of the holding body 12 and the rotating body 13 can be reduced, the size of each drive source can be reduced.

FIG. 6 is a perspective view showing a configuration of an X-ray imaging system using an X-ray imaging apparatus according to a second embodiment of the present invention, and is the same as the first embodiment in FIG. Are given the same reference numerals, and their descriptions are omitted to avoid duplication.

The difference between the X-ray imaging apparatus 1A of the present embodiment and the first embodiment is that the base member is installed so as to be rotatable in the horizontal direction with respect to the floor (that is, the direction of arrow D in FIG. 6). 5 On 1, the lower part of the annular holder 1 2 is fixed.

FIG. 6 is a perspective view when the X-ray imaging apparatus 1A is at the reference position. At this time, the holder 12 and the base member 51 are aligned with the direction of the X axis when viewed from above. The virtual circular plane of the rotating body 13 held so as to be rotatable along the inner peripheral surface of the holding body 12 is located in the XZ plane. 7 and 8 are views showing the state of the X-ray imaging system when the X-ray imaging apparatus 1A is at the reference position. FIG. 7 (a) is a front view, and FIG. (b) is a plan view, FIG. 7 (c) is a right side view, FIG. 8 (a) is a left side view, FIG. 8 (b) is a rear view, and FIG. 8 (c) is a It is a bottom view. Note that the front face in FIG. 78 corresponds to the left side face in FIG. FIG. 9 is a cross-sectional view of the X-ray imaging apparatus 1A when the X-ray imaging apparatus 1A is at a reference position (reference state). As shown in FIG. 9, a part of the base member 51 is rotatable via a bearing 52 in a hole provided in the floor 17 (or a hole of an anchor member embedded in the floor 17). The base member 51 is rotatable about the rotation center axis P4. Thus, the rotation center axis P 4 passes through the center point 19 of the rotating body 13. At an appropriate position in the base member 51, a base member drive motor 53 is mounted, and an output gear 54 of the base member drive motor 53 and a base member 5 are provided. The whole 1 and a gear 55 that rotates integrally are appropriately connected via a gear train. Therefore, the rotation of the base member drive motor 53 causes the base member 51 to rotate around the rotation center axis P4 and rotate in the direction of arrow D in FIG. The rotating body 13 and the rotating body 13 move in the direction of arrow D in FIG. At this time, since the rotation center axis P 4 is configured to pass through the center point 19 of the rotating body 13, even if the base member 51 rotates, the center point 19 of the rotating body 13 (in other words, If it does, the reference center point of the imaging system composed of the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 will not be displaced at all.

The base member 51 has a built-in drive motor 25 for the rotating body, and an output pulley 26 of the drive motor 25 for the rotating body is attached to a part of the outer periphery of the rotating body 13. It is connected to the formed pulley portion 27 via a belt 28. Therefore, the rotation of the rotating body drive module 25 causes the rotating body 13 to rotate along the inner peripheral surface of the ring-shaped holding body 12, whereby the rotating body 13 becomes the holding body 1 The center axis of 2 is set as a rotation center axis P3 so as to rotate in the direction of arrow B in FIG.

In the X-ray imaging apparatus 1A according to the present embodiment having such a configuration, the first embodiment is performed except that the virtual circular plane of the rotating body 13 cannot be tilted with respect to a plane perpendicular to the floor surface. The same operation as that of the X-ray imaging apparatus 1 of the embodiment is performed, and substantially the same effects as those of the X-ray imaging apparatus 1 of the first embodiment are achieved.

FIG. 10 is a perspective view showing a configuration of an X-ray imaging apparatus according to a third embodiment of the present invention. In FIG. 10, components equivalent to those of the first embodiment are denoted by the same reference numerals. The explanation is omitted to avoid duplication.

The difference between the X-ray imaging apparatus 1B of the present embodiment and the first embodiment is that The holding block 62 holding one side of the ring-shaped holder 12 fixed to the support column 61 suspended from the surface is held rotatably around the rotation center axis P5. It is in. The holding block 62 is rotated in the direction of arrow E in FIG. 10 by the rotation of a holding block driving motor (not shown), whereby the holding block 62 is integrated with the holding block 1 2. And the rotating body 13 moves in the arrow E direction. Therefore, the imaginary circular plane of the rotating body 13 rotatable along the inner peripheral surface of the annular holding body 12 should take a position oblique to the Y axis at an arbitrary angle while maintaining the vertical state. become. Note that, in the present embodiment, the rotation of the holding probe 62 causes the center point 19 of the rotator 13 (in other words, the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 to be constituted). Since the reference center point of the imaging system to be moved moves, it is preferable that the bed 2 be configured to move in a direction to cancel the movement.

Also in the X-ray imaging apparatus 1B of the present embodiment having such a configuration, the virtual circular plane of the rotating body 13 cannot be tilted up and down (in the vertical swing direction) with respect to a plane perpendicular to the floor. Except for the above, the effects similar to those of the X-ray imaging apparatus 1 of the first embodiment are obtained.

As described above, according to the present invention, it is possible to provide an X-ray imaging apparatus having an excellent space factor when an X-ray tube or a two-dimensional X-ray detector rotates. Further, it is possible to provide an X-ray imaging apparatus having a smaller space factor and an excellent space factor, in which the components installed for the subject are more compact. Further, it is possible to provide an X-ray imaging apparatus capable of obtaining a two-dimensional X-ray image of a part to be inspected (a part to be treated by a patient) at a desired arbitrary angle.

Claims

The scope of the claims

1. A holding body arranged so that its radial direction is perpendicular to the floor surface, an annular rotating body rotatably held along the peripheral surface of the holding body, and the rotating body An X-ray source and a two-dimensional X-ray detector respectively arranged at radially opposite positions on the inner circumference of the object, and rotating the rotating body to rotate the entire circumference of the subject positioned in the space inside the rotating body. An X-ray imaging apparatus capable of acquiring X-ray image data from different directions.

2. An annular holding body arranged so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body. An X-ray source and a two-dimensional X-ray detector respectively disposed at radially opposite positions on an inner peripheral surface of the rotating body, wherein the rotating body is rotated to be positioned in a space inside the rotating body. An X-ray imaging apparatus capable of acquiring X-ray image data from all directions around a subject.

3. An annular holding body disposed so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body. An X-ray source and a flat panel type two-dimensional X-ray detector respectively disposed at radially opposite positions on the inner peripheral surface of the rotating body; An X-ray imaging apparatus capable of acquiring X-ray image data from all directions around a subject positioned at an X-ray.

4. An annular holding body disposed so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body. An X-ray source disposed on the rotator; and a two-dimensional X-ray detector disposed on the rotator so as to face the X-ray source in a radial direction of the rotator. Rotating the body to obtain X-ray image data from all directions of the subject located in the space within the body of rotation; one of an inner surface of the holder and an outer surface of the body of rotation; In this case, a plurality of ring-shaped conductors are provided, and on the other side, a conductive brush which is in sliding contact with the ring-shaped conductor is provided. The ring-shaped transmission and reception of signals between the X-ray source and the X-ray detector and a control panel provided outside the holding body and the rotating body and performing various controls and arithmetic processing are performed by the ring-shaped. An X-ray imaging apparatus, wherein the X-ray imaging is performed via a conductor and the conductive brush.

5. An annular holding body disposed so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body. An X-ray source disposed on the rotator; and a two-dimensional X-ray detector disposed on the rotator so as to face the X-ray source in a radial direction of the rotator. By rotating the body, X-ray image data from all directions of the subject located in the space within the body of rotation can be obtained, and the center of the side of the holder is perpendicular to the floor surface. The holding body is held rotatably about a horizontal rotation shaft support provided on the support pillar, and the rotation shaft is used as a rotation center. When the holding body and the rotating body rotate integrally, the virtual circular surface of the rotating body is perpendicular to the floor surface. X-ray imaging apparatus according to feature by being configured so as to be tilted with respect to a surface.

6. The device according to claim 4, wherein a lower portion of the support column is connected to a base arm, and the base arm is rotatable in a horizontal direction at a position facing a lower center of the holder. When the base arm body is held on the floor surface and rotated, the support column, the holding body, and the rotating body are integrally formed around a vertical rotation axis passing through a center point of the rotating body. An X-ray imaging apparatus characterized by being configured to rotate.

7. An annular holding body arranged so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body. An X-ray source disposed on the rotator; and a two-dimensional X-ray detector disposed on the rotator so as to face the X-ray source in a radial direction of the rotator. By rotating the body, the entire circumference of the subject located in the space inside the body of rotation X-ray imaging apparatus, wherein X-ray image data can be obtained from different directions, and the holding body is held so as to be rotatable around a vertical rotation axis passing through a center point of the rotating body as a rotation center. .

8. The device according to claim 6, wherein the holding member is mounted on a base member disposed on a floor so as to be rotatable around a vertical rotation axis passing through a center point of the rotating member as a center of rotation. An X-ray apparatus characterized by the following.

9. An annular holding body disposed so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body. An X-ray source disposed on the rotator; and a two-dimensional X-ray detector disposed on the rotator so as to face the X-ray source in a radial direction of the rotator; An object is placed in a space between a radiation source and the two-dimensional X-ray detector, and the rotator is rotated so that X-rays from all directions around the object located in the space in the rotator Image data can be obtained, and the holding body is held in a cantilever manner by holding a center of one side of the holding body on a support pillar that is erected perpendicularly to the floor surface. The holding body is rotatably held around a vertical rotation shaft support provided on the support column, and the rotation shaft support is used as a rotation center. By rotating the holding body and the rotating body integrally, the virtual circular plane of the rotating body can rotate around the rotating shaft support while maintaining a vertical state with respect to the floor surface. An X-ray apparatus characterized in that it is configured as follows.

10. An annular holding body arranged so that its radial direction is perpendicular to the floor, and an annular rotating body rotatably held along the inner peripheral surface of the holding body An X-ray source disposed on an inner peripheral surface of the rotator; and a flat panel disposed on an inner peripheral surface of the rotator so as to face the X-ray source in a radial direction of the rotator. A two-dimensional X-ray detector, wherein the rotating body is rotated to obtain X-ray image data from the entire circumference of the subject located in the space inside the rotating body. One of the inner peripheral side and the outer peripheral side of the rotating body A plurality of ring-shaped conductors are provided, and a conductive brush which is slidably contacted with the ring-shaped conductor is provided on the other, and the X-ray source, the X-ray detector, and the holder are provided. And transmitting and receiving signals to and from a control panel, which is provided outside the rotating body and performs various controls and arithmetic processing, via the ring-shaped conductor and the conductive brush. X-ray equipment