JP2000312674A - X-ray radiographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray radiographing device improved in safety by preventing an X-ray tube or two-dimensional X-ray detector from hitting an operator or assistant during rotation. SOLUTION: This device is provided with an annular holder 12 arranged so that the diameter thereof can be perpendicular to the surface of a floor, an annular rotator 13 held so as to be rotated along with the inner peripheral surface of the holder 12, an X-ray source 14 and a flat panel type X-ray detector 15 respectively arranged at positions confronted in the diameter direction on the inner peripheral surface of the rotator 13. By rotating the rotator 13, the X-ray image data of a patient positioned within a space inside the rotator in all peripheral directions can be acquired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray imaging apparatus, and more particularly, to a treatment capable of generating three-dimensional image data and called an IVR (interventional radiology: catheter operation under fluoroscopy). The present invention relates to an X-ray imaging apparatus suitable for use in a method.

[0002]

2. Description of the Related Art X-ray CT (computerized tomography:
Such an X-ray CT apparatus is generally known as shown in FIG. 11, and a tunnel-shaped cavity 5 is formed in the center of a box-shaped gantry housing 501 as shown in FIG.
02, and a part of the body of the subject 505 lying on the reversible top plate 504 of the bed 503 is inserted into the cavity 502 on the opposed inner peripheral wall of the cavity 502. By synchronously rotating an X-ray tube (not shown) and an arc-shaped linear X-ray detector, X-ray image data of the subject to be inspected is obtained from all directions around the subject to be inspected. A tomographic image is generated. Then, by appropriately step-feeding the top plate 504 (that is, by step-feeding the part to be inspected of the subject 505), a plurality of tomographic images of the part to be inspected of the subject 505 are obtained. Accordingly, it is also possible to generate three-dimensional image data of the inspected part based on this. Note that a two-dimensional X-ray detector is used instead of the linear X-ray detector.
An X-ray tube and an X-ray image intensifier are set to 1 using an X-ray image intensifier as a X-ray detector.
There is also known a method of generating three-dimensional image data of an inspected part from X-ray image data from the entire circumference of the inspected part obtained by rotation.

[0003] Such an X-ray CT apparatus is very effective for confirming the position and shape of a treatment target site, but is not suitable for performing an IVR operation. What is necessary is that the treatment target part of the patient needs to enter the hollow part 502 of the gantry housing 501, so that the practitioner or assistant needs to have a space for smooth treatment or to attach to the patient. It becomes difficult to secure a space for mounting the instrument, and when the patient's head is in the cavity 502, it is not possible to observe the patient's facial expression and the like during the operation to know a sudden change in condition. And the gantry housing 50
This is because 1 has a considerable thickness and gives the patient a feeling of oppression.

Therefore, conventionally, after a diagnosis is made by the above-described X-ray CT apparatus, an X-ray as shown in FIG.
IVR has been performed using a radiographic apparatus.
In FIG. 12, reference numeral 601 denotes a base member; 603, a base arm attached to the base member 601 so as to be rotatable around a rotation support shaft 602; and 604, an arc-shaped attached to the tip of the base arm 603. Holder, 6
05 is held by the holder 604 and the holder 6
A C-arm that can be rotated and slid by a predetermined amount along 04, 606 is an X-ray tube attached to one end of the C-arm 605, and 607 is attached to the other end of the C-arm 605. 2D X-ray detector, 608 is a bed, 609 is a top plate of the bed 608, 610 is a top plate 609
Subject lying on top.

[0005] In the X-ray imaging apparatus shown in FIG.
The X-ray tube 606 and the two-dimensional X
The base arm 60 is placed between the base arm 60 and the line detector 607.
3 is rotated in the direction of arrow M as necessary, and the C-shaped arm 605 is rotated in the direction of arrow N as necessary.
A dimensional X-ray image is obtained. Therefore, I
When performing a VR, the practitioner should use the 2
While viewing the three-dimensional X-ray image on the monitor screen in the operating room,
It is possible to perform treatment (procedure), and it is relatively easy to secure space for practitioners and assistants to perform smooth treatment, and to secure space for mounting devices that need to be attached to patients. Furthermore, it becomes possible to observe the expression of the patient during the operation.

[0006] However, the X-ray imaging apparatus shown in FIG. 12 is not an apparatus for obtaining X-ray CT, but merely obtains a two-dimensional X-ray image. The shape and the positional relationship between the treatment target site and the treatment instrument attached to the tip of the catheter,
There is a problem that it cannot be grasped intuitively.

In the X-ray imaging apparatus shown in FIG. 12, the C-arm 605 (the X-ray tube 606 and the two-dimensional X-ray detector 607) is also rotated by 360 °, and the position of the subject to be inspected is examined. It is theoretically possible to obtain X-ray image data from all directions and to generate three-dimensional image data of the inspected part based on the X-ray image data. However, in this case, in the configuration of FIG. 12, the space occupied by the trajectory of the member that rotates 360 ° becomes large, which impairs the space factor in the operating room, and the member that the practitioner or the assistant rotates can use. The danger of hitting is also greater. Further, since the span L2 from the base member 601 to the tip of the C-arm 605 is large, the X-ray tube 606 and the two-dimensional X-ray detector
In addition, there is a problem in that the displacement due to the bending of the structural member occurs at the center position with respect to 07, and the image quality of the reconstructed three-dimensional image, that is, the spatial resolution is reduced. (For example, "SP
IE-The International Society for Optical Engineeri
ng Vol.2708, PP361-370, 1996 ”, the 3D image data must be reconstructed after correcting the deviation of the center position for each X-ray image, which increases the amount of calculation. However, there is a problem that three-dimensional image data cannot be obtained quickly).

The applicant of the present invention has proposed a radiographic apparatus capable of generating three-dimensional image data and suitable for IVR as Japanese Patent Application No. 10-306238. FIG. 13 is a diagram showing the X-ray imaging apparatus described in the prior application.

In FIG. 13, reference numeral 701 denotes a base member provided with a circular through-hole, and 702 denotes an annular ring held so as to be rotatable along the inner peripheral surface of the through-hole of the base member 701. A rotator 703 is an X-ray tube attached to the rotator 701 via a first arm 704, and a 705 is a two-dimensional X-ray detector attached to the rotator 701 via a second arm 706 ( An X-ray image intensifier or a flat panel type two-dimensional X-ray detector), 707 is a bed, and 708 is a top plate of the bed 707.

In the X-ray imaging apparatus shown in FIG.
The rotating body 702 (that is, the X-ray tube 703 and the X-ray tube 703) is placed in a state where the inspection site of the subject (not shown) lying on the top plate 708 is placed between the X-ray tube 703 and the two-dimensional X-ray detector 705. The two-dimensional X-ray detector 705) is rotated by 360 ° about the rotation center axis P10 to obtain X-ray image data from all around the inspection region of the subject, and based on this, the X-ray image of the inspection region is obtained. It is possible to generate three-dimensional image data.
In addition, when performing IVR, the practitioner can visually recognize most of the patient's body, easily observe the patient's facial expressions and the like during the operation, and perform smooth treatment by the practitioner and assistants. It is also easy to secure a space for performing the measurement and a space for mounting instruments that need to be worn on the patient. Further, a span L1 from the base member 701 to the end of the imaging system
Can be made much shorter than the configuration of FIG.
The center position between the tube 703 and the two-dimensional X-ray detector 705 is hardly displaced by the bending of the structural member, and the image quality of the reconstructed three-dimensional image, that is, the spatial resolution is improved.

[0011]

As described above, in the technique previously proposed by the present applicant as Japanese Patent Application No. 10-306238 (hereinafter simply referred to as a prior application), three-dimensional image data is generated. It is possible to obtain an X-ray imaging apparatus suitable for IVR.

However, in the X-ray imaging apparatus according to the prior application, since the X-ray tube 703 and the two-dimensional X-ray detector 705 attached to the arm project from the rotating body 702, the X-ray tube 703 and the two-dimensional X-ray detector 70
If the practitioner or assistant enters carelessly within the rotation locus of 5,
There is a possibility of collision with the X-ray tube 703 or the two-dimensional X-ray detector 705, and there is still room for improvement in terms of safety. Further, in the X-ray imaging apparatus according to the prior application, the base member 701
Since a control panel for performing various controls and arithmetic processing is built therein, there is naturally a limit in reducing the thickness of the base member 701 (the dimension in the axial direction of the through hole).
The ray tube 703 and the two-dimensional X-ray detector 705
4, there is a certain limit to further reducing the size of the components installed on the subject. Further, in the X-ray imaging apparatus according to the prior application,
Inspection site of the subject at the time of IVR (the site to be treated by the patient)
No consideration has been given to obtaining the desired two-dimensional X-ray image at any desired angle.

The present invention has been made in view of the above points,
The purpose is to provide a highly safe X-ray imaging apparatus that prevents a practitioner or an assistant from hitting when the X-ray tube 703 or the two-dimensional X-ray detector 705 rotates. is there. It is another object of the present invention to provide an X-ray imaging apparatus which has a flattened configuration member installed on a subject and has an excellent space factor. It is another object of the present invention 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. It is in.

[0014]

In a typical example of an X-ray imaging apparatus according to the present invention, an annular holding body disposed so that its radial direction is perpendicular to a floor surface, An annular rotator rotatably held along the inner peripheral surface of the body, X-ray sources and flat panel type two-dimensional X-ray detectors respectively disposed at radially opposite positions on the inner peripheral surface of the rotator A rotating device for rotating the rotating body to obtain X-ray image data of the subject located in the space in the rotating body from all directions.

A plurality of ring-shaped conductors are provided 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 in sliding contact with the ring-shaped conductor. A conductive brush is provided to transmit and receive signals between the X-ray source and X-ray detector and a control panel disposed outside the holding body and the rotating body for performing various controls and arithmetic processing. It is configured to perform via a conductor and a conductive brush.

Further, the holding body is held in a cantilever manner by holding the center of one side thereof on a supporting column standing upright with respect to the floor surface. An imaginary circle of the rotating body is held by being rotatable about a horizontal rotating shaft support provided on the support column, and the holding body and the rotating body integrally rotating about the rotating shaft support as a rotation center. The plane is configured to be tiltable with respect to a plane perpendicular to the floor.

The lower portion of the supporting column is connected to a base arm, and the base arm is held on the floor so as to be rotatable in a horizontal direction at a position facing the center of the lower portion of the holder. As the arm body rotates, the support column, the holding body, and the rotating body rotate integrally about a vertical rotation axis passing through the center point of the rotating body,
Be composed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration of an X-ray imaging system using the X-ray imaging apparatus according to the first embodiment of the present invention.

In FIG. 1, 1 is an X-ray imaging apparatus, 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 device 4 and the control panel 5 are arranged in a separate room having a window through which the X-ray imaging apparatus 1 and the bed 2 can be viewed, which are arranged in the operating room. Although not shown, a display device capable of displaying image data obtained by appropriately processing the X-ray image data captured by the X-ray imaging device 1 is provided in an operating room in a position easily viewable by a practitioner or assistant. Only the number is installed. In addition, the operation console 3 and the control panel 5 with the display device 4 can be provided in the operating room, or can be a television camera to monitor the state of the operating room. The control is completely isolated from the operating room. It may be provided in the room.

The control panel 5 includes an X-ray imaging apparatus 1 and a bed 2
A mechanical drive control unit for driving and controlling each drive source to be described later, which is built in the X-ray imaging apparatus 1, and an X-ray imaging system control unit for an X-ray source and a two-dimensional X-ray detector to be described later, which are installed in the X-ray imaging apparatus 1. ,
An image processing unit that performs image processing, a main control unit that performs overall control of the entire system, and a power supply unit and the like are incorporated as needed. Then, by operating the console 3, the driving sources of the X-ray imaging apparatus 1 are drive-controlled to cause the X-ray imaging apparatus 1 to take a desired posture or to rotate a rotating body of the X-ray imaging apparatus 1 described later. The top plate 6 is moved in the direction of the arrow A in FIG. 1 by controlling the driving source (not shown) of the bed 2 to perform X-ray imaging of the inspected part of the subject by using the X-ray imaging system. It is designed to move forward and backward. Further, the operation of the console 3 causes the image processing unit to generate three-dimensional image data or the like based on the X-ray image data obtained by the X-ray imaging system, or the three-dimensional image data or two-dimensional data output from the image processing unit. Image data and the like are displayed on a display device in the operating room or on a display device of the console 3.

In the X-ray imaging apparatus 1 of the present embodiment shown in FIG. 1, reference numeral 7 denotes a substantially L-shaped holding member viewed from the front, and includes a horizontal (parallel to the floor) base arm 8 and a base arm A support base 9 vertically erected from one end of the base arm 8 is integrated, and a rotation base 10 rotatably held on the floor surface is provided at the other end of the base arm body 8. Is provided. Reference numeral 11 denotes a support block rotatably held on a side surface of the support column 9, and an annular holder 12 is fixed to the support block 11. 13 is a holder 12
An annular rotating body held by the holding body 12 so as to be rotatable along the inner circumferential surface of the rotating body 13. Source 1
4 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 is moved in the direction of arrow B with respect to the holding body 12 and the holding block 11 (and the holding body 12 and the rotating body 13) is held by the holding member. 7, the holding member 7 is rotatable with respect to the floor surface in the direction of arrow D. In the state shown in FIG. 1, the holding block 11 and the holding member 7 are positioned from the reference position. This shows a state in which it has been turned by a fixed amount.

In FIG. 1, the Y axis indicates the horizontal body axis direction of the subject (not shown) lying on the top 6, the X axis indicates the direction perpendicular and horizontal to the Y axis, The axis indicates a direction perpendicular to the floor surface. When the X-ray imaging apparatus 1 is at the reference position (reference state), the holding member 7 is in a state in which it coincides with the direction of the X axis when viewed from above, and
(And the holding body 12 and the rotating body 13) are 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.
2 (a) is a front view, FIG. 2 (b) is a plan view, FIG. 2 (c) is a right side view, FIG. 2 (d) is a left side view, and FIG. 2 (e) is a bottom view. FIG. 2 (f) is a rear view,
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.

As shown in FIGS. 4 and 5, a part of the rotating base 10 of the base arm body 8 of the holding member 7 has a bearing 18 provided in a hole provided in the floor 17 (or a hole of an anchor member embedded in the floor 17). Is held so as to be rotatable through
The holding member 7 is configured to be rotatable around the rotation center axis P1. The rotation center axis P1 passes through the center point 19 of the rotating body 13. As shown in FIG. 5, a holding member drive motor 20 is provided in an appropriate hole of the floor 17, and an output pinion 21 of the holding member drive motor 20 is fixed to the rotating base 10. It is in mesh with the gear 22. 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. , Rotating body 1
3 move integrally in the direction of arrow D in FIG. At this time, since the rotation center axis P1 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, X
The reference center point of the imaging system composed of the radiation source 14 and the flat panel type two-dimensional X-ray detector 15 does not shift at all.

As shown in FIG. 4, a driving motor 23 for the holding block is built in the supporting column 9 of the holding member 7, and an output member (for example, a reduction gear) of the driving motor 23 for the holding block. An output shaft 24 of a gearbox with rows is fixed to the holding block 11. In addition,
The rotation center axis P2 of the output member 24 passes through the center point 19 of the rotating body 13. Accordingly, the rotation of the holding block drive motor 23 causes the holding block 11 to rotate around the rotation center axis P2 and rotate in the direction of arrow C in FIG. Also moves integrally 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). At this time, since the rotation center axis P2 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 X-ray source The reference center point of the imaging system constituted by the flat panel type two-dimensional X-ray detector 15 and the flat panel type two-dimensional X-ray detector 15 does not shift at all.

Further, as shown in FIG.
1 includes a driving motor 25 for the rotating body, and an output pulley 26 of the driving motor 25 for the rotating body includes a pulley portion 27 formed on a part of the outer periphery of the rotating body 13 and a belt 2.
8 are connected. Therefore, the rotation of the rotating body drive motor 25 causes the rotating body 13 to rotate along the inner peripheral surface of the annular holding body 12, thereby causing the rotating body 13 to rotate.
Is designed to rotate in the direction of arrow B in FIG. 1 with the center axis of the holder 12 as the rotation center axis P3.

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 ring-shaped 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 thereto, is provided with a holding member 12.
(The installation location of the conductive brush 31 may be any position on the inner peripheral surface of the holder 12). The ring-shaped conductor of the slip ring portion 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.
One independent contact is connected to the control panel 5 via an appropriate connection cord means.

That is, in the X-ray imaging apparatus of the present invention, the rotating body 13 is provided with an X-ray source 14 and a flat panel type two-dimensional The X-ray detector 15 is equipped with only an X-ray imaging system necessary for X-ray imaging, and all control circuits, power supply systems, and image processing systems of the X-ray imaging system are all X-ray imaging systems. After removing from the apparatus, transmission and reception of signals between the X-ray imaging system and the control panel 5 and power supply from an external power supply circuit,
It is configured to be performed via the slip ring portion 30 and the conductive brush 31.

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

In this state, the rotating body driving motor 2
5, the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 are drive-controlled while rotating the rotating body 13 by 360 °, so that the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 The image processing unit of the control panel 5 captures the two-dimensional X-ray image data from the flat panel type two-dimensional X-ray detector 15, and the image processing unit converts the two-dimensional image data into digital image data. Store them sequentially in memory. In response to an operation instruction from 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 performing three-dimensional image data processing. Is generated and stored in the 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 site and performs a desired cross section of the inspected site by a known method similar to the above. Is generated as necessary, and is stored in the frame memory. Methods for generating these tomographic image data and three-dimensional 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, and a method for generating three-dimensional image data is used. As for "LAFeldkampet al. Practical con
e beam algorithm, J.Opt.Soc.Am.A, Vol.1, No.6, pp612
-619, 1984 ”, a method of constructing and calculating a cone beam image by Feldkampet.

The three-dimensional image data or the tomographic image data of the predetermined cross section stored in the frame memory are 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 visually and easily grasp the position and shape of the treatment target site with the three-dimensional image data of the inspected region of the subject, and furthermore, the three-dimensional image data By the rotation processing, the enlargement processing, and the like, it is possible to more reliably confirm the position and shape of the treatment target site. In addition, since it is possible to refer to tomographic image data of a desired cross section as well, more reliable diagnosis is possible.

After performing the diagnosis based on the three-dimensional image data or the like as described above, when performing the treatment by the IVR, the driving motor 20 for the holding member and the driving motor 23 for the holding block are appropriately driven as necessary. Control, and by this,
The holding member 7 is rotated in the direction of arrow D in FIG. 1, and the holding block 11 is rotated in the direction of arrow C in FIG. 1, so that the virtual circular plane of the rotating body 12 is arbitrary with respect to the body axis of the subject. Makes the right and left tilt angle and the vertical tilt angle take. Further, by driving the rotating body driving motor 25, the rotating body 13 is positioned 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 displayed in the operating room. Display on the device in real time, and perform treatment by IVR.

Accordingly, 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 operator can stand at a position where the practitioner can easily perform treatment on the patient. It is also possible to place the body 13 out of the way of the treatment. Furthermore, since the position of the center point 19 of the rotating body 13 is invariable in any position, the virtual circular plane of the rotating body 12 can be set at an arbitrary position with respect to the body axis of the subject. Even during the IVR in which the horizontal tilt angle or the vertical tilt angle is set, it is possible to obtain three-dimensional image data and tomographic image data. Even during the IVR, the three-dimensional shape of the treatment target site and the treatment target site can be obtained. The positional relationship with the treatment instrument attached to the distal end of the catheter can be accurately visually recognized in real time.

Further, in the present embodiment, the body (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. Can be an X-ray imaging apparatus that gives the subject (patient) an open feeling and a sense of security with very little pressure on the subject (patient). In addition, it is possible to easily and surely confirm the facial expression of the patient during the operation. Thus, the holding body 12
The reason why the radial thickness of the rotating body 13 can be made small and the axial length can be made extremely short as described above is that the X-ray source 14 and the flat panel type two-dimensional X-ray An X-ray source 14 and a flat-panel two-dimensional X-ray source 14 are provided without installing bulky circuit elements such as a control circuit system in the holding body 12 and the rotating body 13 by installing only the detector 15.
This is because transmission and reception of a signal to and from the outside with respect to the line detector 15 and power supply are performed via the slip ring unit 30 and the conductive brush 31 described above.

In this embodiment, the rotating body 13
X-ray source 14 and flat panel type two-dimensional X
Since the line detector 15 is provided, the imaging system does not protrude from the rotating body in the radial direction as in the related art of FIG. 13. Therefore, even if the rotating body 13 rotates,
There is no danger of the imaging system colliding with the practitioner or assistant, and the safety can be improved.

Further, in the present embodiment, the holding body 12 and the rotating body 13 are made compact to secure a space for a practitioner or assistant to perform a smooth treatment or a space for mounting a device to be mounted on a patient. In addition, since the weight of the holding body 12 and the rotating body 13 can be reduced, the size of each driving source can be reduced.

FIG. 6 is a perspective view showing the configuration of an X-ray imaging system using an X-ray imaging apparatus according to a second embodiment of the present invention, which is equivalent to the first embodiment. Are denoted by the same reference numerals, and description thereof is omitted to avoid duplication.

The X-ray imaging apparatus 1A of the present embodiment
The difference from the embodiment is that the lower part of the annular holding body 12 is fixed to a base member 51 installed rotatably in the horizontal direction (that is, the direction of arrow D in FIG. 6) with respect to the floor surface. is there.

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 in a state in which they coincide with the direction of the X axis when viewed from above. The imaginary 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 show the X-ray imaging apparatus 1.
8A is a diagram showing a state of the X-ray imaging system when A is at a reference position, where FIG. 7A is a front view, FIG. 7B is a plan view, and FIG. 8A is a left side view, FIG. 8B is a rear view, and FIG. 8C is a bottom view. The front in FIGS. 7 and 8 corresponds to the left side in FIG.

FIG. 9 is a 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 held in a hole provided in the floor 17 (or a hole of an anchor member embedded in the floor 17) so as to be rotatable via a bearing 52. The base member 51 is configured to be rotatable around a rotation center axis P4, and the rotation center axis P4 is
It 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.
The third output gear 54 and a gear 55 that rotates integrally with the entire base member 51 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. 13 moves in the direction of arrow D in FIG. At this time, the rotation center axis P4 is
9, even if the base member 51 rotates, the center point 19 of the rotating body 13 (in other words, the X-ray source 14 and the flat panel type two-dimensional X-ray detector 15 The position of the reference center point of the imaging system does not deviate at all.

The base member 51 incorporates a driving motor 25 for the rotating body.
The fifth output pulley 26 is connected via a belt 28 to a pulley 27 formed on a part of the outer periphery of the rotating body 13. Therefore, the rotation of the rotating body drive motor 25 causes the rotating body 13 to rotate along the inner peripheral surface of the annular holding body 12, whereby the rotating body 13 moves the center axis of the holding body 12 to the rotation center axis P3. 1 in the direction of arrow B in FIG.

In the X-ray imaging apparatus 1A according to the present embodiment having such a configuration, except that the virtual circular plane of the rotating body 13 cannot be tilted with respect to a plane perpendicular to the floor, 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 obtained.

FIG. 10 is a view showing an X-axis according to the third embodiment of the present invention.
It is a perspective view showing a configuration of a radiographic apparatus, in the figure,
Components equivalent to those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted to avoid duplication.

The X-ray imaging apparatus 1B of the present embodiment
What is different from the embodiment is that the support pillar 61 is suspended from the floor surface.
In addition, a holding block 62 to which one side of the annular holding body 12 is fixed and held is held so as to be rotatable around a rotation center axis P5. The holding block 62 is rotated in the direction of arrow E in FIG. 10 by the rotation of the holding block drive motor (not shown), whereby the holding body 12 and the rotating body 13 are integrated with the holding block 62 in the direction of arrow E. Moving. Therefore, the virtual circular plane of the rotating body 13 rotatable along the inner peripheral surface of the annular holding body 12 assumes a position oblique to the Y axis at an arbitrary angle while maintaining the vertical state. In the present embodiment, the rotation of the holding block 62 causes the center point 19 of the rotating body 13 (in other words,
Since 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 moves, the bed 2 may be configured to move in a direction to cancel the movement. desirable.

In the X-ray imaging apparatus 1B according to 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 X-ray imaging apparatus 1 of the first embodiment
This has substantially the same effect.

[0048]

As described above, according to the present invention, X
When the tube or the two-dimensional X-ray detector rotates, it prevents the practitioner and assistants from hitting each other.
A radiographic apparatus can be provided. In addition, it is possible to provide an X-ray imaging apparatus having a more compact configuration member installed for the subject and having an excellent space factor. Further, it is possible to provide an X-ray imaging apparatus capable of obtaining a two-dimensional X-ray image of a subject to be examined (a subject to be treated by a patient) at a desired arbitrary angle.

[Brief description of the drawings]

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

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 illustrating 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 an X-ray imaging apparatus according to a second embodiment of the present invention is in a reference position state.

FIG. 8 is an explanatory diagram when an X-ray imaging apparatus according to a second embodiment of the present invention is in a 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 an X-ray imaging apparatus according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A, 1B X-ray imaging apparatus 2 Bed 3 Operation console 4 Display device 5 Control panel 6 Top plate 7 Holding member 8 Base arm body 9 Support column 10 Rotation base 11 Holding block 12 Holding body 13 Rotating body 14 X-ray source Reference Signs List 15 flat panel type two-dimensional X-ray detector 20 holding member drive motor 23 holding block drive motor 25 rotating body drive motor 30 slip ring portion 31 conductive brush 51 base member 53 base member drive motor 61 support column

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Riki Suzuki 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Inside Hitachi Medical Corporation (72) Inventor Hiroshi Takagi 1-11-1 Uchikanda, Chiyoda-ku, Tokyo No. Hitachi Media, Ltd. (72) Inventor Takaaki Kobiki 1-1-14 Uchikanda, Chiyoda-ku, Tokyo F-term (reference) 4C093 AA22 BA03 BA09 CA15 CA33 EB17 EC02 EC13 EC15 EC17 EC23 EC25 EC28 EC44 EC47 EC60

Claims (9)

[Claims] 1. An annular holder arranged so that its radial direction is perpendicular to the floor surface, and an annular rotation rotatably held along an inner peripheral surface of the holder. A rotating body, and 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. The rotating body is rotated to be positioned in a space in the rotating body. An X-ray imaging apparatus capable of acquiring X-ray image data of the subject from all directions. 2. The X-ray imaging apparatus according to claim 1, wherein the two-dimensional X-ray detector is a flat panel type two-dimensional X-ray detector. 3. An annular holder arranged so that its radial direction is perpendicular to the floor, and an annular rotation rotatably held along the inner peripheral surface of the holder. A body, an X-ray source provided on the rotating body, and a two-dimensional X-ray detector provided on the rotating body so as to face the X-ray source in a radial direction of the rotating body, An X-ray imaging apparatus that is capable of acquiring X-ray image data from an entire circumferential direction of a subject positioned in a space in the rotating body by rotating the rotating body, wherein the inner circumferential surface of the holding body and A plurality of ring-shaped conductors are disposed on one of the outer peripheral surfaces of the rotating body, and a conductive brush that is relatively in sliding contact with the ring-shaped conductor is disposed on the other, and the X-ray Source and the X-ray detector, and a control panel that is provided outside the holding body and the rotating body and performs various controls and arithmetic processing. X-ray imaging apparatus characterized by the transfer of items, and to perform through the ring-shaped conductor and the conductive brush. 4. An annular holder arranged so that its radial direction is perpendicular to the floor, and an annular rotation rotatably held along the inner peripheral surface of the holder. A body, an X-ray source provided on the rotating body, and a two-dimensional X-ray detector provided on the rotating body so as to face the X-ray source in a radial direction of the rotating body, An X-ray imaging apparatus which is capable of acquiring X-ray image data from all directions around a subject positioned in a space inside the rotating body by rotating the rotating body, wherein the holding body has a side center. Is held on a supporting column vertically erected on the floor surface, and the holding member is rotatably held around a horizontal rotation shaft support provided on the supporting column, and By rotating the holding body and the rotating body integrally with the rotating shaft support as a center of rotation, the rotating body is rotated. Soen plane, X-rays imaging apparatus characterized by being configured so as to be tilted with respect to the floor surface and a plane perpendicular. 5. The support column according to claim 4, wherein a lower portion of the support column is connected to a base arm, and the base arm is opposed to a lower center of the holder.
It is held on the floor surface so as to be rotatable in the horizontal direction, and by rotating the base arm body, the support column, the holding body, and the rotating body are rotated vertically through a center point of the rotating body. An X-ray imaging apparatus characterized in that the apparatus is configured to rotate integrally with a center of rotation. 6. An annular holder arranged so that its radial direction is perpendicular to the floor surface, and an annular rotation rotatably held along an inner peripheral surface of the holder. A body, an X-ray source provided on the rotating body, and a two-dimensional X-ray detector provided on the rotating body so as to face the X-ray source in a radial direction of the rotating body, An X-ray imaging apparatus that is capable of acquiring X-ray image data from all directions around a subject positioned in a space inside the rotating body by rotating the rotating body. An X-ray imaging apparatus characterized in that it is held so as to be rotatable about a vertical rotation axis passing through a center point as a rotation center. 7. The base member according to claim 6, wherein the holding member is mounted on a base member arranged on a floor surface so as to be rotatable about a vertical rotation axis passing through a center point of the rotating member. An X-ray apparatus characterized by being placed. 8. An annular holder arranged so that its radial direction is perpendicular to the floor surface, and an annular rotation rotatably held along an inner peripheral surface of the holder. A body, an X-ray source provided on the rotating body, and a two-dimensional X-ray detector provided on the rotating body so as to face the X-ray source in a radial direction of the rotating body, An object is arranged in a space between the X-ray source and the two-dimensional X-ray detector, and the rotator is rotated to rotate the rotator so that the X-ray of the object located in the space in the rotator from the entire circumferential direction is obtained. An X-ray imaging apparatus capable of acquiring X-ray image data, wherein the holding body has one side center held by a supporting column vertically erected with respect to a floor surface. The holding body is held, and the holding body is held rotatably around a vertical rotation shaft support provided on the support column, and By rotating the holding body and the rotating body integrally with the rotating shaft supporting portion as the center of rotation, the virtual circular plane of the rotating body rotates the rotating shaft supporting portion while maintaining the vertical state with respect to the floor surface. An X-ray imaging apparatus characterized in that it is configured to be able to turn as a center. 9. The X-ray source and the two-dimensional X-ray detector according to claim 3, wherein the X-ray source and the two-dimensional X-ray detector are arranged to face each other on an inner peripheral surface of the rotating body. The two-dimensional X-ray detector is a flat panel type two-dimensional X-ray detector.