JPH063541Y2 - Bidirectional X-ray fluoroscopy system - Google Patents

Description

Detailed Description of the Invention A. BACKGROUND OF THE INVENTION This invention relates to an X-ray fluoroscopic apparatus, and more particularly to spinal cord angiography (myelography), percutaneous transhepatic cholangiography (PTC), bronchiography, BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-direction X-ray fluoroscopic imaging apparatus that is used for endoscopic examination and performs fluoroscopic imaging of a subject from two directions, a positive direction and a lateral direction.

B. BACKGROUND ART In examination, diagnosis, treatment, etc. using an X-ray fluoroscopic apparatus, the position and size of a diagnostic site, or the route and direction when inserting a device such as a catheter or needle into the body of a subject are three-dimensional. It may be necessary to figure out.

In such a case, a two-direction X-ray fluoroscope is used,
The diagnostic site is three-dimensionally grasped by irradiating the subject with X-ray flux from two directions, positive and side, and performing fluoroscopic imaging.

This type of two-direction X-ray fluoroscopic imaging apparatus is composed of an X-ray tube device and an image receiving device (image intensifier), which are arranged to face each other on the upper and lower sides of the subject lying on the top plate of the fluoroscopic imaging table. The apparatus includes a direction perspective imaging unit, and a side direction perspective imaging unit including an X-ray tube device and an image receiving device (image intensifier) that are arranged to face each other on the left and right sides of the subject.

FIG. 3 is a front view showing an example of such a conventional two-direction X-ray fluoroscopic imaging apparatus.

A top plate 2 is provided on the upper surface of the fluoroscopic imaging table 1 configured to be tiltable, and the subject S is laid down on the top plate 2. The top plate 2 is configured to be movable along the body axis direction of the subject S.

The forward direction X-ray tube device 4a is fixed to the upper end of the U-shaped support frame 3 attached to the fluoroscopic imaging stand 1, and the forward direction image receiving device 4b is fixed to the lower end thereof. The direction perspective imaging unit 4 is configured. The positive direction X-ray tube device 4a is located above the subject S, the positive direction image receiving device 4b is located below the subject S, and they are vertically opposed to each other.

When the fluoroscopic imaging base 1 is tilted up and down, the U-shaped support frame 3, the positive direction X-ray tube device 4a and the positive direction image receiving device 4b are integrally displaced in the same direction by the same angle. That is, the forward direction X-ray tube device 4a that constitutes the forward direction fluoroscopic imaging unit 4
And the positive direction image receiving device 4b have a fixed relationship mechanically (physically).

A lateral image receiving device 5b is fixedly attached to the upper and lower central portions of the U-shaped support frame 3. Therefore, the side direction image receiving device 5b is also displaced along with the up and down movement of the fluoroscopic imaging base 1.

A ceiling suspension device 7 is slidably suspended in the longitudinal direction of the top plate 2, that is, the front-back direction and the left-right direction, on a ceiling rail 6 along the longitudinal direction of the top plate 2 of the fluoroscopic imaging table 1, that is, the body axis direction of the subject S. There is. The ceiling suspension device 7 is vertically contractible by a drive mechanism provided inside, and a lateral X-ray tube device 5a is attached to the lower end thereof.
The lateral X-ray tube device 5a and the lateral image receiving device 5b.
And constitute a side perspective imaging unit 5. The lateral X-ray tube device 5a is located on the left side of the subject S, and the lateral image receiving device 5b is located on the right side of the subject S, and they face each other in the left-right direction.

When the bidirectional X-ray fluoroscopic imaging apparatus is used only for forward fluoroscopic imaging, or when the practitioner needs to treat the subject S (patient), the lateral lateral fluoroscopic imaging unit 5 The lateral X-ray tube device 5a needs to be sufficiently separated from the fluoroscopic imaging table 1 so that the X-ray tube device 5a does not interfere with the practitioner. For this reason,
The lateral X-ray tube device 5a and the attached ceiling suspension device 7 are configured to be slidable along the ceiling rail 6 in the front-rear direction and the left-right direction. Therefore, the lateral X-ray tube device 5a is, so to speak, mechanically separated from the lateral image receiving device 5b.

By the way, in the case of two-way fluoroscopy, in order to correctly grasp the position of the site to be radiographed, the forward fluoroscopy unit 4 and the side fluoroscopy unit 5 should always be maintained in a correct orthogonal positional relationship. is important. In order to maintain the orthogonality of the units 4 and 5 when the fluoroscopic imaging table 1 on which the object S is placed is tilted to position or position the object S and to change the posture, the fluoroscopic imaging table 1 is used. With respect to the movement of the side direction image receiving device 5b which is integrally displaced with the side direction image receiving device 5b, the side direction X-ray tube device 5a mechanically separated from the side direction receiving device 5b is followed by the side direction image receiving device 5b at the same angle in the same direction at the same time. It needs to be displaced.

(a) Because of the following movement of the lateral X-ray tube device 5a with respect to the lateral image-receiving device 5b, in the case of FIG. 3, the lateral X-ray tube device 5a is attached to the lower end of the ceiling suspension device 7. Around the optical axis of the side perspective imaging unit 5, that is, the side direction X
The wire tube device 5a and the lateral direction image receiving device 5b are mounted rotatably around an axis connecting the lateral direction image receiving device 5b and the lateral direction X
A connecting rod 8 extending from the wire tube device 5a is detachably connected to the lower end of the U-shaped support frame 3.

That is, the forward-direction fluoroscopic imaging unit 4 including the forward-direction X-ray tube device 4a and the positive-direction image receiving device 4b is displaced as the fluoroscopic imaging platform 1 is tilted, and at the same time, the lateral fluoroscopic imaging is performed together with the U-shaped support frame 3. When the side-direction image receiving device 5b of the unit 5 is displaced, the side-direction X-ray tube device 5a integrated with the U-shaped support frame 3 via the connecting rod 8 also has the same angle in the same direction as the forward direction fluoroscopy unit 4. Therefore, the orthogonality between the forward perspective imaging unit 4 and the side perspective imaging unit 5 is maintained.

The connecting rod 8 is detachable from the U-shaped support frame 3 because the lateral X-ray tube device 5a needs to be sufficiently separated from the fluoroscopic imaging table 1 as described above.

(b) Lateral X-ray tube device 5a with respect to the lateral image receiving device 5b
As another method for following the movement of the, the connecting rod 8 is not used, a detector for the displacement (direction and distance) of the side direction image receiving device 5b is provided, and the side direction X-ray tube device 5a is moved in the vertical direction and the top plate. 2 is provided with a drive mechanism for displacing along the longitudinal direction, which is the longitudinal direction, and a servo system is configured between the detector and the drive mechanism, so that the lateral X-ray tube device 5a can be received. There is a method of following the displacement of 5b.

C. Problems to be Solved by the Invention However, there are problems in both the above methods (a) and (b).

That is, in the method (b), since the tracking control of the lateral X-ray tube device 5a is electrically performed using the servo system, the lateral image receiving device 5b is operated while the fluoroscopic imaging platform 1 is being tilted. The side-direction X-ray tube device 5a follows the displacement of 1) with a delay, and the stop position often varies. As a result, there is a problem that the orthogonality of both units 4 and 5 is likely to shift.

Further, in diagnosis and treatment by bidirectional fluoroscopy such as spinal cavity contrast examination and percutaneous transhepatic cholangiography examination, it is highly necessary for the practitioner to appropriately approach the subject (patient) and perform treatment. In the method a), when the practitioner approaches the subject, the connecting rod 8 is first separated, then the lateral X-ray tube device 5a is retracted together with the ceiling suspension 7, and after the treatment, the lateral X-ray tube device is again provided. 5a must be returned and the connecting rod 8 must be joined. Such a work is very cumbersome and time-consuming, and there is a possibility that a positional shift may occur at the time of reconnection.

Further, since the connecting rod 8 is attached to the lateral X-ray tube device 5a, it is difficult to retract the lateral X-ray tube device 5a as it is, and it is necessary to temporarily retract the lateral X-ray tube device 5a largely in the lateral direction. It is also a problem in terms of labor and space.

The present invention has been made in view of such circumstances, and improves the tracking accuracy of the lateral X-ray tube device with respect to the displacement of the lateral image receiving device, and also facilitates the retreat movement of the lateral X-ray tube device. The purpose is to achieve

D. Means for Solving the Problems The present invention has the following configuration in order to achieve such an object.

That is, the present invention is directed to a forward direction fluoroscopic imaging unit including a forward direction X-ray tube device and a forward direction image receiving device, which are arranged to face each other above and below a vertically movable fluoroscopic imaging table, and to this forward direction fluoroscopic imaging unit. And a side direction X-ray tube unit, which is arranged so as to be orthogonal to each other on the left and right sides of the fluoroscopy table, and includes a side direction X-ray tube device and a side direction image receiving device. -Direction X-ray fluoroscopy in which a device and a side direction image receiving device are fixedly attached to the fluoroscopic imaging stand via a support frame, and the side direction X-ray tube device is attached to a vertically-extendable ceiling suspension device. In the imaging device, the ceiling suspension device is hung from a ceiling rail via a movable frame that is movable in the front-rear direction, which is the longitudinal direction of the perspective imaging table top plate, and is hung from the movable frame in parallel with the ceiling suspension device. Guide Ray A movable base is slidably fitted on the movable base, and the movable base is rotatably connected to the support frame by a connecting pin in a direction parallel to the optical axis of the side-view fluoroscopic photographing unit. An up-and-down movement amount detector of this moving table is provided, and a suspension device drive mechanism for expanding and contracting the ceiling suspension device is provided. The up-and-down movement amount detector and the suspension device drive mechanism are electrically linked via a servo system. In addition, it is characterized in that the connection can be released.

E. Operation The operation of the configuration of this invention is as follows.

That is, when the fluoroscopic imaging table is tilted up and down, the support frame, the forward direction fluoroscopic imaging unit including the forward direction X-ray tube device and the forward direction image receiving device, and the side direction image receiving device are moved in the vertical direction and the front-back direction (of the transparent imaging table top plate). In the same manner as in the lateral image receiving device in the vertical direction and the front-back direction, the moving table is also displaced by the same amount in the vertical direction and the front-rear direction, but the lateral X-ray tube device and the lateral image receiving device are displaced. Regarding the displacement in the front-back direction, the ceiling suspension, movable frame, guide rail, moving base, connecting pin,
Since it is mechanically connected via the support frame, it can move in the lateral direction X
The linear tube device follows the front-rear direction in the same direction as the lateral image receiving device with the same amount and with high accuracy without delay or deviation.

At the same time, the vertical movement amount of the moving base is detected by the vertical movement amount detector, and the detection signal is given to the suspension actuator drive mechanism via the servo system, whereby the ceiling suspension device is expanded and contracted to the lateral direction. The X-ray tube device is made to electrically follow the lateral image receiving device in the vertical direction.

As described above, since the lateral X-ray tube device follows the displacement of the lateral image receiving device at least in the front-rear direction based on the mechanical connection, a conventional example in which the front-rear direction and the up-down direction are electrically followed. The orthogonality of the lateral fluoroscopic imaging unit with respect to the forward fluoroscopic imaging unit is better maintained compared to.

Further, when the practitioner approaches the subject and performs treatment, when the lateral X-ray tube device is in the way, the lateral X-ray tube device and the support frame are free from each other, so that the vertical movement amount detector is If the electrical connection with the suspension drive mechanism is released, the side direction X
There is no obstacle to the upward movement of the wire tube device,
The evacuation of the wire tube device does not need to be largely moved laterally as in the conventional example, and it is only necessary to immediately move it upward from that position.

F. Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a front view of a two-direction X-ray fluoroscopic imaging apparatus, and FIG. 2 is a sectional view taken along the line II-II in FIG. is there.

In these figures, the same reference numerals as the reference numerals shown in FIG. 3 according to the conventional example refer to the same parts, parts and the like indicated by the reference numerals also in the present embodiment. Further, unless otherwise specified, the present embodiment and the conventional example have the same configuration in terms of arrangement, connection relationship, and the like.

In this embodiment, the configuration different from the conventional example is as follows.

Front-back direction that is the longitudinal direction of the top plate 2 (direction perpendicular to the paper surface)
A movable frame 9 which is long in the left-right direction is slidably engaged with a ceiling rail 6 provided along the side wall, and a lateral X-ray tube device is attached to a lower end of a ceiling suspension device 7 suspended from one end of the movable frame 9. 5a is attached so as to be displaceable along the up-down direction, the left-right direction, and the front-back direction.

In addition, from the other end of the movable frame 9 to the guide rail 10 in the vertical direction.
Is hung down, and the lower end thereof is located on the lateral side of the connection base 11 fixed to the U-shaped support frame 3, and the guide rail 10 and the connection base.
11 and are connected as follows. That is, the movable table 12 is slidably fitted on the guide rail 10 through the plurality of guide rollers in the vertical direction, and the movable table 12 is provided with the connecting pin 13 which is movable in the left-right direction and is projectingly biased. Fitted in 11 center holes. The axis of the connecting pin 13 is located at the optical axis of the side-view fluoroscopic imaging unit 5.

Thus, in the front-back direction, the lateral X-ray tube device 5
a and the side direction image receiving device 5b are a ceiling suspension device 7, a movable frame 9, a guide rail 10, a moving base 12, a connecting pin 13, and a connecting base 1.
1, mechanically connected through the U-shaped support frame 3.

In addition, the movable table 12 includes a movable table 12 for the guide rail 10.
While the detector 14 for the vertical movement amount of is provided,
The ceiling suspension device 7 is provided with a suspension device driving mechanism 15 for vertically moving the lateral X-ray tube device 5a by expanding and contracting the ceiling suspension device 7, and a vertical movement amount detector.
14 and the suspension drive mechanism 15 are electrically linked via a servo system. This electrical connection is based on the lateral X-ray tube device 5
The ceiling suspension operation panel 16 attached to a can be connected and disconnected.

The fluoroscopic imaging table 1 is provided with a tabletop angle detector 17 for detecting the tilt angle of the tabletop 2 due to its up and down movement, while a collimator for rotating the lateral collimator 18 in the lateral X-ray tube device 5a. A drive mechanism 19 is provided, and the top plate angle detector 17
And the collimator drive mechanism 19 are linked via the servo system.

When the fluoroscopic imaging stand 1 is tilted up and down, the forward direction fluoroscopic imaging unit 4 including the U-shaped support frame 3, the forward direction X-ray tube device 4a and the forward direction image receiving device 4b, the lateral direction image receiving device 5b, and the connecting table 11 are moved up and down. The movable base 12 is also displaced in the vertical direction and the front-rear direction by the same amount in the same direction as the lateral image receiving device 5b via the connecting pin 13.

The displacement of the movable table 12 in the front-rear direction is accompanied by the displacement of the guide rail 10, the movable frame 9, the ceiling suspension 7, and the lateral X-ray tube device 5a in the front-rear direction due to the displacement of the connecting table 11 in the front-rear direction. Therefore,
The lateral X-ray tube device 5a includes the lateral image receiving device 5 in the front-back direction.
Follows the same amount in the same direction as b. In this case, since the lateral X-ray tube device 5a is mechanically connected to the lateral image receiving device 5b in the front-rear direction, the lateral X-ray tube device 5a does not move in the longitudinal direction.
It follows the displacement of with high accuracy without delay or deviation.

At the same time, the vertical movement amount detector 14 detects the amount of vertical movement of the movable table 12, and the detection signal is given to the suspension drive mechanism 15 via a servo system to expand and contract the ceiling suspension 7. Then, the lateral X-ray tube device 5a is electrically moved in the vertical direction to follow the lateral image receiving device 5b.

In this way, the lateral X-ray tube device 5a follows the displacement of the lateral image receiving device 5b at least in the front-back direction (top plate 2
Since it is performed based on mechanical connection in the longitudinal direction), compared with the conventional example in which the front-back direction and the up-down direction are made to electrically follow, the side-direction perspective photographing unit 5 with respect to the forward direction perspective photographing unit 4 is The orthogonality can be better maintained and a more accurate two-way perspective image can be obtained.

The tilt angle of the tabletop 2 due to the tilting of the fluoroscopic imaging table 1 is detected by the tabletop angle detector 17, and the collimator drive mechanism 19 is driven via the servo system based on the detected signal to drive the side direction system. By rotating the collimator 18, the posture of the lateral directional collimator 18 is controlled by following the inclination of the top plate 2.

Further, when the practitioner approaches the subject S and performs a treatment, when the lateral X-ray tube device 5a is an obstacle, the connecting rod 8 supports the lateral X-ray tube device 5a and a U-shape like the conventional example. Since the frame 3 is not connected but both are free, the ceiling suspension operation panel 16 is operated to operate the vertical movement amount detector 14
If the electrical connection between the suspension drive mechanism 15 and the suspension device is released, there is nothing that hinders the upward movement of the lateral X-ray tube device 5a.
By manually pushing up the lateral X-ray tube apparatus 5a from its position, the lateral X-ray tube apparatus 5a can be quickly retracted upward toward the ceiling while the ceiling suspension device 7 is contracted. As a result, a large work space can be opened around the subject S.

Then, after the treatment of the subject S is completed, when the lateral fluoroscopy is restarted, the lateral X-ray tube device 5a is manually operated.
Can be set quickly.

In addition, when it is desired to perform lateral fluoroscopy at the time of forward fluoroscopy, when the lateral X-ray tube device 5a is set while the fluoroscopy radiographing table 1 is being tilted up and down, the lateral direction image receiving device 5b is used. The lateral X-ray tube device 5a can be tracked with high accuracy in the front-back direction because of mechanical coupling.
As long as the wire tube device 5a is set up and down,
The orthogonality of both units 4 and 5 can be maintained with high accuracy.

Ceiling suspension control panel 16 instead of manual setting
If the vertical movement amount detector 14 and the suspender drive mechanism 15 are linked again by operating, the setting in the vertical direction is automatically performed, but this is time consuming, so rather manual operation is preferable. .

When using the two-direction X-ray fluoroscopy apparatus exclusively in the forward direction fluoroscopy, the connecting pin 13 should be used.
It is pulled out from 11, and the lateral X-ray tube device 5a is largely moved to the rear of the fluoroscopic imaging stand 1 along the front-back direction. At this time, the ceiling suspension device 7, the movable frame 9, the guide rails 10, the moving table
12 also retreat together.

G. Effect of the Invention According to this invention, the following effects are exhibited.

That is, the method of following the lateral X-ray tube device with respect to the displacement of the lateral image receiving device caused by the tilting of the fluoroscopic imaging table is made different in the front-rear direction and the vertical direction, and in the vertical direction, the lateral X-ray tube device and the side are arranged. Although it is electrically linked to the direction image receiving device, in the front-back direction, the side direction X-ray tube device is mechanically connected to the side direction image receiving device to perform high-precision follow-up without delay or deviation. In the front-back direction, the orthogonality of the side direction fluoroscopic imaging unit with respect to the forward direction fluoroscopic imaging unit can be favorably maintained, and an accurate bidirectional fluoroscopic image can be obtained.

Further, when the practitioner approaches the subject and performs a treatment when the lateral X-ray tube device becomes an obstacle, the lateral X-ray tube device and the support frame are free from each other. If the electrical connection with the suspension drive mechanism is released, there is nothing that hinders the upward movement of the lateral X-ray tube device, and the lateral X-ray tube device can be quickly retracted upward.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a front view of a two-direction X-ray fluoroscopic imaging apparatus, and FIG. 2 is a sectional view taken along the line II-II in FIG. . FIG. 3 is a front view of a conventional example. DESCRIPTION OF SYMBOLS 1 ... Perspective imaging stand 2 ... Top plate 3 ... U-shaped support frame 4a ... Forward direction X-ray tube device 4b ... Forward direction image receiving device 4 ... Forward direction perspective imaging unit 5a ... Side direction X-ray tube device 5b ... Side direction image receiving Device 5 ... Side perspective imaging unit 6 ... Ceiling rail 7 ... Ceiling suspension device 9 ... Movable frame 10 ... Guide rail 12 ... Moving base 13 ... Connecting pin 14 ... Vertical movement amount detector 15 ... Suspension device driving mechanism

Claims (1)

[Scope of utility model registration request] 1. A forward direction fluoroscopic imaging unit comprising a forward direction X-ray tube device and a forward direction image receiving device, which are arranged so as to face each other above and below a tiltable fluoroscopic imaging table, and a forward direction fluoroscopic imaging unit. The forward direction X-ray tube device and the forward direction image receiving device are provided with a lateral direction X-ray tube unit including a lateral direction X-ray tube device and a lateral direction image receiving device that are arranged so as to be orthogonal to each other on the left and right sides of the fluoroscopic imaging table. And a side direction image receiving device is fixedly attached to the fluoroscopic imaging stand via a support frame, and the side direction X-ray tube device is attached to a vertically extensible ceiling suspension device. In the device, the ceiling suspender is hung from a ceiling rail via a movable frame that is movable in the front-rear direction, which is the longitudinal direction of the perspective imaging table top plate,
A movable table is slidably fitted on a guide rail that hangs from the movable frame in parallel with the ceiling suspension, and the movable table is parallel to the optical axis of the side perspective imaging unit with respect to the support frame. Direction connecting pin is rotatably connected, the moving base is provided with a vertical movement amount detector of the moving base, and the ceiling suspension device is provided with a suspender drive mechanism for expanding and contracting the vertical movement amount detector. A two-way X-ray fluoroscopic imaging apparatus, characterized in that the pendulum drive mechanism and the pendant drive mechanism are electrically linked and unlinkable via a servo system.