JP2001190548A - X-ray fluoroscopic photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the technique capable of improving the operation property of an X-ray fluoroscopic photographing device. SOLUTION: In the X-ray fluoroscopic photographing device having an X-ray source irradiating X-ray beams against a subject, a photographing means photographing X rays passing through the subject, a display means displaying X-ray images photographed by the photographing means, and a pressing means pressing a central part of a photographing region of the X-ray image, the pressing means is provided with a means for moving a pressed part to arbitrary position in the photographing region to enable pressing to a desired position based on the X-ray image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopic apparatus, and more particularly to a technique which is effective when applied to an X-ray fluoroscopic apparatus having a compression mechanism for compressing a diagnostic part of a subject and a peripheral part thereof. Things.

[0002]

2. Description of the Related Art In a conventional inspection using an X-ray fluoroscope, a C-arm type X-ray fluoroscope is used for examination of a circulatory system, and a fluorography table or the like is used for examination of a digestive system. It had been.

[0003] A fluoroscopic table is provided with an X at one end of a linear support.
A radiation source is arranged and an X-ray detector is arranged at the other end to form an imaging system. In this imaging system, the top is inserted from the side so as to be sandwiched, and the subject is imaged obliquely in the body axis direction by tilting the top itself in the longitudinal direction or tilting the support in the longitudinal direction of the top. Oblique shooting was possible. Further, a fluoroscopic imaging table in which an X-ray detector fixed to a support is integrated with a top plate has also been used for examination of a digestive system.

On the other hand, a C-arm type X-ray fluoroscopic apparatus is disclosed in, for example, Japanese Patent Application Laid-Open No. HEI 9-117442.
An X-ray source is disposed at one end of an arc-shaped arm called a C-shaped arm, and an X-ray detector is disposed at the other end. The top plate for setting the angle is set to be cantilevered, and a C-shaped arm is inserted from the longitudinal direction (the body axis direction of the subject) or the side direction of the top plate to obtain a desired tilt angle X. Radiography was possible.

In recent years, C-arm X-ray fluoroscopy apparatuses have been used for examination and treatment of the digestive system due to the degree of freedom of the imaging angle with respect to the subject. An apparatus equipped with a compression mechanism has been developed so that the fluoroscopic apparatus can be used for examination and treatment of the circulatory system and the digestive system. This compression mechanism is a mechanism for observing a dynamic change of an organ to be inspected by compressing a diagnostic site, and has the following configuration.

The conventional compression mechanism is of the following type: (1) A bending mechanism is arranged at both ends of a support arm, and the compression mechanism and the support arm are stored in side portions of a frame by bending the bending mechanism by a drive mechanism. And (2) a type in which a compression mechanism is moved by a drive mechanism moving a support arm along a guide groove provided in a frame.
In the compression mechanism of the type (1), a straight line connecting the X-ray focal point, which is the X-ray central axis of the imaging system, and the center position of the X-ray detector is arranged so as to be orthogonal to the rotation axis of the bending mechanism. The movable part of the compression part at the time of compression is configured to substantially coincide with the X-ray central axis, that is, the center of the imaging region. (2)
In the compression mechanism of the type, the first guide portion formed so that the extending direction of the guide groove coincides with the X-ray central axis direction;
A second guide portion having a guide groove formed so as to retract the compression cylinder from the imaging visual field range of the imaging system is formed continuously, and the driving mechanism only moves the support arm in the X-ray central axis direction. Thus, the compression operation of the organ to be compressed and the retraction of the compression mechanism have been enabled. Also in the compression mechanism of the type (2), the compression position by the compression section is configured to substantially coincide with the X-ray central axis, that is, the center of the imaging region.

That is, in an examination in which the digestive tract is inspected, the imaging region and the compression position are almost determined by the shape of the organ to be inspected and the purpose of the inspection. The function was not hindered simply by being configured to compress the part.

[0008]

SUMMARY OF THE INVENTION As a result of studying the above prior art, the present inventor has found the following problems. With the advance of medical technology in recent years, X-ray fluoroscopic apparatuses have come to be used for angiographic examination and the like. However, in an angiography examination of the abdomen, gas (intestinal gas) may be present in the intestinal tract in the imaging region, and in such a case, the X-ray transmission amount of the subject changes at that location, There is a problem that the running state of the blood vessel to be imaged cannot be clearly imaged. As a method for solving this problem, a method has been attempted in which intestinal gas is moved to a position where it does not hinder diagnosis by compressing the intestinal tract from outside the body, and X-ray fluoroscopy is performed. For example, when a portion where the iliac artery branches into the right iliac artery and the left iliac artery is set as the imaging region, the imaging region is set so that the branch point of the iliac artery is located in the peripheral portion of the imaging visual field. By,
It was common to photograph the right iliac artery and the left iliac artery after bifurcation. However, when the intestinal gas is present at the branching point of the left iliac artery, it is necessary to move the position of the intestinal gas by pressing the location where the intestinal gas is accumulated under fluoroscopy. In such a case, in the conventional X-ray fluoroscopy apparatus, as described above, the compression position is limited to the central portion of the imaging region. Therefore, when intestinal gas is present other than in the central portion of the imaging region, The center of the imaging area must be moved to the position where gastrointestinal gas is stored, and there is a problem that operability is reduced.

In the case of using a C-arm X-ray fluoroscope for examination and treatment of a circulatory system, such as an angiographic examination and catheterization under X-ray fluoroscopy (hereinafter referred to as "IVR"). In addition, the examiner needs to perform a procedure on the subject from the side surface position of the top plate on which the subject rests. In particular, when a catheter is inserted from the iliac artery under fluoroscopy to treat the heart, for example, when the insertion point of the catheter is far away from the treatment point, the imaging position is changed together with the insertion of the catheter. It had to be moved. For this reason, the conventional C
In the arm-type X-ray fluoroscopic apparatus, an operation device (hereinafter, referred to as a “table side operation device”) for controlling the tilt angle of the top plate, movement in the front-rear and left-right directions, and the rotation angle and the tilt angle of the C-shaped arm. ) Was attached to the side of the top plate.

On the other hand, in the examination of the digestive system, the examiner operates a console for remote control installed in the adjacent room to move the top plate at an angle of inclination, fore-and-aft, right and left directions, and to move the C-shaped arm. It has been common to control the rotation and tilt angles. For this reason, the subject accidentally touches the table-side operation device when the subject gets on or off the tabletop or during X-ray fluoroscopy (during examination or treatment), and an operation that the examiner does not expect is performed. It was necessary to prevent it from being stripped.

An object of the present invention is to provide a technique capable of improving the operability of the device. Another object of the present invention is to provide a technique capable of reducing the amount of exposure of a subject. Another object of the present invention is to provide a technique capable of preventing erroneous operation of the table side operation device. The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0012]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

(1) An X-ray source for irradiating an X-ray beam to a subject, an imaging means for taking an X-ray image from the X-ray beam transmitted through the subject, and a display for displaying the taken X-ray image Means, and an X-ray fluoroscopic apparatus comprising a compression unit having a compression unit for compressing a predetermined part of the subject and a support arm for supporting the compression unit at one end, wherein the other end of the support arm is A support arm rotating mechanism rotatably supporting on an axis provided in parallel with the central axis of the X-ray beam, and a compressing unit moving mechanism for moving the compressing unit in a direction perpendicular to the central axis.

(2) In the X-ray fluoroscopic apparatus according to the above (1), the support arm has a mechanism that expands and contracts in the longitudinal direction of the support arm.

(3) A table on which the subject is placed, an X-ray source for irradiating the subject with an X-ray beam, imaging means for taking an X-ray image from the X-ray beam transmitted through the subject, Display means for displaying the obtained X-ray image, control means for controlling conditions for moving the table, X-ray irradiation conditions for the X-ray source, imaging conditions for the imaging means, and display conditions for the display means, X provided with table side operation means provided near the controller for setting various conditions in the control means.
In the fluoroscopy apparatus, use instruction means for giving an instruction to use the table side operation means, storage instruction means for giving an instruction to store the table side operation means, and the use instruction means or the storage instruction means give the instruction. Means for moving the table side operation means based on an instruction.

(4) In the X-ray fluoroscopic apparatus according to the above (3), the means for moving the table side operating means is a first movement for moving the table side operating means to the back side of the table. Means for moving the table side operation means along the back surface of the table.

(5) In the X-ray fluoroscopic apparatus according to the above (3) or (4), the means for moving the table side operating means is such that the table side operating means is outside the imaging range of the imaging means. Means to move to

According to the above-mentioned means (1) and (2), the X-ray beam emitted from the X-ray source and transmitted through the subject is imaged by the imaging means as, for example, a two-dimensional X-ray image. The imaging region at this time is determined according to the organ to be inspected and the purpose of the inspection, as in the conventional X-ray fluoroscopy. At this time, in the X-ray fluoroscopic apparatus of the present invention, the support arm rotating mechanism rotatably supports the other end of the support arm on an axis provided in parallel with the center axis of the X-ray beam, and the compression unit moving mechanism performs compression. Since the unit is configured to move in the direction perpendicular to the central axis, the compression unit can move the compression unit to an arbitrary position in the imaging region. As a result, even when the intestinal gas is located at a position other than the center of the imaging region, the examiner moves the compression position by the compression unit without moving the subject or the imaging unit, It can be easily moved to a position that does not hinder intestinal gas imaging. Therefore, the operability of the device can be improved.

Further, since the compressing portion can be quickly moved to the position where the intestinal gas is stored without moving the imaging region, which requires a relatively long time, the amount of exposure of the subject can be reduced.

At this time, by providing the support arm with a mechanism that expands and contracts in the longitudinal direction of the support arm, the compression by the rotation by the support arm rotation mechanism and the expansion and contraction operation of the support arm by the expansion and contraction mechanism without moving the entire compression means. Since the part can be moved, the compression part can be moved more quickly.

According to the above-mentioned means (3) to (5),
The moving means moves the table side operating means based on a storage instruction from the storage instructing means at the time of elevating and lowering the subject, which is a scene where the subject is most likely to come into contact with the table side operating means, Since the table side operation unit can be moved to the storage position where the object does not contact, it is possible to prevent erroneous operation due to the object coming into contact with the operation unit. Also,
Even when the examiner works near the tabletop after placing the subject on the table, such as in the examination of the circulatory system, the moving means operates the table side based on the use instruction from the use instruction means. By moving the means, the table side operating means can be moved to a use position (operation position) such as a table side, etc., so that erroneous operation can be prevented without lowering the operability of the apparatus.

In particular, the moving means is constituted by a first moving means for moving the operating means to the back side of the table and a second moving means for moving the table side operating means along the back side of the table. When the subject moves up and down, the table side operating means can be retracted to the back side of the table, so that the possibility of contact between the subject and the table side operating means can be further reduced.

At this time, since the moving means moves the table side operation means to outside the imaging range of the imaging means, it is possible to widen the imageable area, so that the diagnosis efficiency can be improved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings together with embodiments (examples) of the invention. In all the drawings for describing the embodiments of the present invention, components having the same functions are denoted by the same reference numerals, and their repeated description will be omitted.

(Embodiment 1) FIG. 1 is a view for explaining a schematic configuration of a C-arm type X-ray fluoroscopic apparatus which is an X-ray fluoroscopic apparatus according to Embodiment 1 of the present invention. 1
1A is a front view illustrating a schematic configuration of a C-arm X-ray fluoroscopic apparatus, and FIG. 1B is a side view illustrating a schematic configuration of the C-arm X-ray fluoroscopic apparatus. FIG. FIG. 2 is a top view for explaining a schematic configuration of the C-arm X-ray fluoroscopic apparatus.

1 and 2, reference numeral 1 denotes a base portion, 2
Is a shaft, 3 is a support frame, 4 is a moving frame, 5
Is a support arm, 6 is an X-ray image intensifier (X-ray II), 7 is a rack, 8 is an X-ray tube device (X-ray source), 9 is a gantry cover, 10 is an arm holder, and 11 is a ceiling. Plate supporting frame, 11a is a protruding portion, 12 is a top plate (table),
13 is a rail of a linear guide bearing, 14 is a rotating shaft, and 15 is an X-ray I.D. I. A support frame, 16 is a cover, 17 is a gantry, 18 is a bracket, 19 is a mechanism cover of a compression mechanism, 20 is a step platform, 21 is a compression cylinder, and 101 is a subject. In the C-arm X-ray fluoroscopic apparatus according to the first embodiment, the other mechanisms and apparatuses except for the compression mechanism are the same as those of the conventional C-arm X-ray fluoroscopic apparatus.
Since the configuration is the same as that of the arm-type X-ray fluoroscopic apparatus, detailed description is omitted.

As is apparent from FIGS. 1 and 2, the C-arm X-ray fluoroscopic apparatus according to the first embodiment has a base 1 fixed to the floor, and a shaft 2 mounted on the base 1. It is rotatably supported around its central axis. A well-known rotary drive mechanism including a gear and a motor (not shown) is arranged on the shaft 2, and the rotary drive mechanism rotates the shaft 2. A support frame 3 is fixed to an end of the shaft 2, and the support frame 3 is configured to rotate as the shaft 2 rotates. A movable frame is arranged on the support frame 3 so as to be linearly movable in the longitudinal direction of the support frame 3. At this time, the support mechanism has the rail 13 of the linear guide bearing and the rack 7 fixedly mounted on the support frame 3, and two blocks (not shown) engaged with the rail 13 of the linear guide bearing inside the moving frame 4. ,
A plurality of guide rollers (not shown) sandwiching both side surfaces of the rack 7 are fixedly provided. Moving frame 4
Is provided with a motor and a pinion (not shown), and the pinion is disposed so as to mesh with the tooth surface provided on the rack 7. It is possible to move electrically along the support frame 3.

An X-ray tube device 8 is disposed at one end of the arc-shaped (C-shaped) support arm 5, and an X-ray I.D.
I. 6 are arranged. The X-ray tube device 8 and the X-ray I.D. I.
6 is disposed to face the X-ray tube device 8 and the subject 1
X-rays irradiated toward the subject 101 and transmitted through the subject 101 are referred to as X-rays I.I. I. By converting the image into an optical image in step 6, an X-ray fluoroscopic image (X-ray image) of the subject 101 is taken. X-ray I. I. 6 is an X-ray I.D. fixed to one end of the support arm 5 via a bracket 18. I. Support frame 15
, So as to be movable in the same direction as the central axis of the X-ray beam (X-ray central axis). The moving mechanism is configured to be electrically movable by a well-known driving mechanism including, for example, a motor with a position detector (not shown), a driving screw and a nut fitted to the driving screw. In addition, X-ray I.D. I. On the support frame 15, a compression mechanism section covered with a mechanism section cover 19 is arranged. In addition,
Details of the compression mechanism will be described later.

The support arm 5 is supported by the arm holder 10 so as to be rotatable around the body axis of the subject 101. The support mechanism has a configuration in which a plurality of guide rollers are fixed inside the arm holder 10, and the protrusions (protruding portions) provided on the outer peripheral surface of the support arm 5 are clamped by the guide rollers. . The support arm 5 is, for example,
A toothed belt wound around the outer peripheral surface of the support arm 5, a toothed pulley fixed to the arm holder 10 around which the belt is wound, and a motor having the pulley fixed to a rotary shaft. The support arm 5 is slidably supported on the arm holder 10 by a known drive mechanism. Arm holder 10 is rotating shaft 1
The rotating shaft 14 is fixed to an end of the moving frame 4 and is rotatably supported by the moving frame 4. At this time, the rotary shaft 14 is supported such that the central axis thereof coincides with the central axis of the shaft 2. The rotating shaft 14 is configured to be driven by a well-known rotating mechanism including a worm wheel, a worm gear, and a motor (not shown).

A gantry 17 covered with a gantry cover 9 is fixed to one end of the support frame 3. Also, the cover 16
A projection 11a is provided on a side surface portion of the top plate support frame 11 in the inside. The projection 11a is supported by a mount 17 by a well-known driving mechanism so as to be movable in the body width direction of the subject 101. ing. This drive mechanism includes, for example, a motor and a pinion provided on a gantry 17, a rack is provided on the protruding portion 11a, and a pinion gear meshes with a rack tooth surface.
The pinion is rotated by a motor.

The top support frame 11 is supported by a drive mechanism (not shown) so that the top 12 on which the subject 101 is mounted can move in the body axis direction of the subject 101. This driving mechanism is configured such that, for example, a motor and a driving screw are provided on the top plate support frame 11, a nut engaged with the driving screw is fixed on the back side of the top plate 12, and the driving screw is rotated by the motor. It has become. The top plate 12 is made of, for example, a carbon fiber molded product having good X-ray transparency, and a step 20 for receiving a foot of the subject 101 is arranged at one end thereof when the bed is set to the inverted position. I have.

As described above, the C-arm type X of the first embodiment
The fluoroscopy apparatus uses an X-ray I.D. I. 6 and a television camera or the like, and is arranged on the side of an X-ray detector, which is compatible with under-tube X-ray photography. By arranging the compression mechanism on the side of the X-ray tube device 8, it goes without saying that so-called over-tube X-ray imaging can be performed.

FIG. 3 is a view for explaining the mounting position of the compression mechanism of the first embodiment shown in FIG.
FIG. 4 is a diagram for explaining a schematic configuration of the compression mechanism unit according to the first embodiment. In particular, FIG. 4A is a front view of the compression mechanism of the first embodiment, and FIG. 4B is a top view of the compression mechanism of the first embodiment.

3 and 4, reference numeral 22 denotes a connecting rod, 2
3 is a slide block, 24 is a spline shaft, 25 is a moving plate, 26 is a bearing, 27 is a first chain wheel, 28 is a latch, 29 is a first motor bracket, and 30 is a first motor bracket.
Motor, 31 is the second chain wheel, 32 is the first chain,
33a to 33d are third to sixth chain wheels, 34 is a mounting bracket, 35 is a seventh chain wheel, 36 is a second motor, 37 is a second chain, 38 is a rotary encoder, 39 is a base plate, Reference numeral 40 denotes a rail of a linear guide bearing, 41 denotes a second motor bracket, 42 denotes a gear, 43 denotes a third motor, 44 denotes a bearing, 45 denotes a drive screw, 46 denotes a block of a linear guide bearing, and 47 denotes a nut. Also,
x, y, and z indicate the X, Y, and Z axes, respectively.
In particular, the Z axis indicates the same direction as the X-ray central axis.

As is apparent from FIGS. 3 and 4, in the compression mechanism of the first embodiment, the compression cylinder 21 is connected to one end of an L-shaped connection rod 22, and the connection rod 22 is connected to the slide block. 23. The slide block 23 is locked to a spline shaft 24 so as to be movable in the same direction as the central axis of the X-ray beam (X-ray central axis). The L-shaped moving plate 25 includes a bearing 26
a, 26b are arranged, and the bearings 26a, 26
By locking the spline shaft 24 with b, the spline shaft 24 is supported rotatably around the central axis of the spline shaft 24. A first chain wheel 27 is disposed at one end of the spline shaft 24. A latch 28 is arranged on the slide block 23 so as to be rotatable around the center axis of the spline shaft 24. Further, a first motor bracket 29 is disposed on the surface of the long side of the moving plate 25, and the first motor 30 is fixed to the first motor bracket 29. A second chain wheel 31 is attached to a rotation shaft (output shaft) of the first motor 30.
The first chain 32 is bridged between the first chain wheel 27 and the second chain wheel 31. With such a configuration, the rotational force of the first motor 30
The compression cylinder 21 is rotated around the spline shaft 24 together with the connecting rod 22, and forms a support arm rotation mechanism. However, the rotation range at this time is the connection rod 22
Must be set within a range that does not come into contact with other mechanical parts. In the first embodiment, it is possible to rotate about 250 degrees in the direction indicated by arrow A from the position (retreat position) shown in FIG. It is set to be.

A third chain wheel 33a is arranged at one end of a surface portion of a side parallel to the Z axis of the moving plate 25, and a fourth chain wheel 33b is arranged at the other end. Have been. Fifth and sixth chain wheels 33c and 33d are arranged in the middle of the third and fourth chain wheels 33a and 33b. Further, in the vicinity of the fifth and sixth sprockets 33c and 33d, a second sprocket 35 having an output shaft attached to a second sprocket 35 is provided.
The motor 36 is fixedly mounted by the mounting bracket 34. The third to seventh chain wheels 33a to 33d, 35 are bridged by a second chain 37, and
The other end of the latch 28 is fixed to a portion from the third chain wheel 33a to the fourth chain wheel 33b in the chain 37. Therefore, in the compression mechanism of the first embodiment, the slide block 23, the connecting rod 22, and the compression cylinder 21 can be moved in the direction parallel to the Z axis, that is, the X-ray center axis, by the rotation of the second motor 36. Thus, the compression portion moving mechanism is configured. At this time, the slide block 23
It moves along a spline shaft 24 arranged in parallel with the shaft. However, the compression cylinder position in the Z-axis direction in FIGS. 3 and 4 is a retreat position, and the slide block 23 at the retreat position is at the upper limit position of the movement along the spline shaft 24. In the compression mechanism according to the first embodiment, a well-known rotary encoder 38 is connected to a rotation shaft of the second motor 36 in order to detect the position of the slide block 23.

X-ray I. I. The base plate 39 is provided on the support frame 15.
Are fixed, and a pair of linear guide bearing rails 40 are arranged on the base plate 39 in parallel with the Y axis. In addition, a third motor 43 having a gear 42 arranged on an output shaft is fixed to the base plate 39 via a motor bracket 41. A gear (not shown) is fitted to the gear 42, and the driving screw 45 extending from the gear (not shown) is rotated around the central axis by rotating the gear 42. The center axis of the drive screw 45 is Y
It is supported by the bearing 44 so as to be parallel to the axis.

On the other hand, a pair of linear guide bearing blocks 46 engaged with the linear guide bearing rails 40 are fixed to the moving plate 25, and the slide block 23, the connecting rod 22, and the compression cylinder 21 are moved. The movement direction with respect to the plate 25 is regulated in the Y-axis direction. A nut 47 that fits into a thread formed along the outer peripheral surface of the driving screw 45 is fixed to the moving plate 25, and the nut 47 moves on the moving plate 25 according to the amount of rotation of the driving screw 45. It is configured to move along the rail 40. However, as described above, Y in FIGS.
The compression cylinder position in the axial direction is the retracted position. At this time, the nut 47 is at the limit of movement on the drive screw 45, and from this retracted position, the compression cylinder 21 is moved in the direction B (Y-axis) shown in FIG. In the opposite direction). The movement of the compression unit 21 at this time is realized by rotating the third motor 43.

In the compression mechanism according to the first embodiment, the first
At the limit position of the movement of the compression unit 21 by the third motors 30, 36, 43, a well-known position detecting means (not shown) including a limit switch and a switch dog is provided, and a detection signal from this position detecting means is provided. On the basis of this, the drive control means (not shown)
43 is configured to be controlled.

Next, FIG. 5 is a top view for explaining the schematic configuration of the console of the first embodiment, and FIG. 6 is a diagram for explaining the operation of the compression mechanism of the first embodiment. , FIG.
The operation of the compression mechanism according to the first embodiment will be described with reference to FIG. However, FIG. 6A is a diagram for explaining the relationship between the compression unit 21 and the X-ray irradiation visual field immediately after switching in the compression unit use mode, and FIG. 6B is a diagram illustrating the compression according to the first embodiment. FIG. 4 is a diagram for explaining a relationship between a movable range of a cylinder and an imaging range (imaging area).

5 and 6, reference numeral 61 denotes an X-ray I.D.
I. , 62 denotes an X-ray I.D. I. Image receiving range, 80
Denotes an operation console, 81 denotes an operation lever, 82 denotes a knob, and 83 denotes a push button. However, for the sake of simplicity, the console 80 shown in FIG. 5 shows only a portion related to the operation of the compression mechanism. Further, the operation instruction by the operation lever 81, the knob 82 and the push button 83 is input to the drive control means of the C-arm X-ray fluoroscopic apparatus according to the first embodiment in the same manner as in the prior art. The drive output is output to the motor of the corresponding part.

The operation lever 81 is an operation lever for instructing the movement of the compression unit 21 in the X-ray central axis direction (Z-axis direction). In particular, in the C-arm X-ray fluoroscopic apparatus according to the first embodiment, , X-ray I. I. 6 also functions as an operation lever for moving the actuator 6 in a direction parallel to the X-ray central axis.
Therefore, in the C-arm X-ray fluoroscopic apparatus according to Embodiment 1, the operation lever 8 is moved in the direction indicated by the up-down arrow in FIG.
1 by moving (tilting) the compression unit 21 or the X-ray I.D. I. 6 can be moved in the X-ray central axis direction.

The knob 82 is supported so as to be rotatable around its central axis with an inclination in a direction indicated by an arrow in the horizontal direction in FIG. 5, and an operation instruction based on the degree of inclination of the knob 82 and an operation instruction based on the degree of rotation. Is possible with one knob. In the first embodiment, the operation instruction accompanying the inclination of the knob 82 corresponds to the rotation control of the third motor 43, that is, the instruction to move the compression unit 21 in the Y-axis direction. The operation instruction accompanying the rotation of the knob 82 is used to control the rotation of the first motor 30, that is, the spline shaft 24 of the compression unit 21.
Corresponds to the rotation instruction with the rotation center.

The push button 83 is a well-known push button having a built-in indicator light, and functions as a switch for switching use / non-use of the compression unit 21. In particular, when the non-use of the compression unit 21 is selected (the push button 83 is turned off)
), The indicator lamp is turned off. In this case, the operation lever 81 is turned off by the X-ray I.D. I. 6 functions exclusively for the movement operation, and the operation by the knob 82 becomes impossible.

On the other hand, when the push button 83 is
When the state is switched to the N state, the drive control means (not shown) outputs the X-ray I.N. I. 6 is moved to a movement limit position in a direction away from the top 12. Next, the drive control means drives the first motor 30 and the third motor 43, and as shown in FIG. 6A, the X-ray at the X-ray center axis position (the center of the X-ray irradiation visual field). I. I. The compression portion, which is a portion formed in a convex shape of the compression cylinder 21, is moved to the center of the image receiving range of No. 6. Thereafter, the drive control unit turns on the indicator lamp as a display indicating that the preparation for using the compression mechanism is completed (compression cylinder use mode). In this state, the drive control means prevents the erroneous operation or the like by enabling the operation lever 81 and the knob 82 to control the compression cylinder 21.

Here, when it is necessary to compress a part other than the center position of the site of interest, for example, when performing an angiographic examination of the iliac artery, the operation of the knob 82 causes the compression cylinder 21 to be compressed. Is moved from a position on the X-ray central axis to a position where compression is required. Next, by operating the operation lever 81 to move the compression cylinder 21 in a direction parallel to the X-ray central axis, compression at a desired position becomes possible. FIG. 6B shows the possible range of the compression unit 21 at this time. In particular, the hatched portion allows the compression unit of the compression unit 21 to be moved within the imaging range of the X-ray image. Range. As is clear from FIG. 6B, in the C-arm X-ray fluoroscopic apparatus according to the first embodiment,
The X-ray I.D. I. 6 image receiving range 62
Can be compressed over almost the entire area, so that the setting of the region of interest is not limited to the compression region, and the operability can be improved. Therefore, since it is possible to perform X-ray fluoroscopy in which the influence of intestinal gas and the like is removed without moving the imaging range of the X-ray image set as the region of interest, the examination efficiency can be improved as compared with the conventional angiography examination. This makes it possible to reduce the amount of exposure of the subject.

In the C-arm X-ray fluoroscopic apparatus according to the first embodiment, the compression cylinder 21 is pressed against the subject 101 by operating the operation lever 81 in the compression cylinder use mode (the direction opposite to the Z-axis direction). ), The X-ray I.D.
I. 6 also moves in the direction approaching the subject 101 in conjunction with the movement of the compression unit. Thus, the X-ray I.D. I. 6 by moving the X-ray I.D. I. 6 automatically approaches the subject 101,
The effect that the quality of the captured X-ray image can be easily improved can be obtained. When the compression unit 21 is moved away from the subject 101, the X-ray I.D. I. 6 is also moved away from the subject 101. Therefore,
The image quality of the X-ray fluoroscopic image can be easily improved. As a result, the diagnostic efficiency can be further improved.

Further, when performing X-ray fluoroscopy (head imaging) of the head of the subject 101, it is possible to prevent a slight movement or the like due to breathing or the like from occurring and lowering the image quality of the X-ray fluoroscopic image. For this purpose, the head is generally fixed to the top plate 12 with a fixing band or the like. However, in the C-arm X-ray fluoroscopic apparatus according to the first embodiment, the position of the compression unit 21 can be changed without being limited to the region of interest. Since the head can be fixed to the top plate 12 only by pressing the head, the time required for fixing the head can be reduced. As a result, it is possible to obtain a special effect that the diagnosis efficiency can be improved.

In this case, by suppressing the compression portion of the compression cylinder 21 along the shape of the head, it is possible to improve the performance of suppressing minute movements and the like during X-ray fluoroscopy. The image quality of the X-ray fluoroscopic image can be improved.

Further, a so-called ironing compression which has conventionally been realized by slightly moving the top plate 12 on which the subject 101 is mounted horizontally with respect to the floor while pressing a desired portion with a compression cylinder is described in the embodiment. In the first C-arm X-ray fluoroscopic apparatus, the compression can be realized by slightly moving the compression cylinder 21 in the XY plane, so that it is possible to eliminate the shaking of the X-ray fluoroscopic image at the time of pressing by ironing. As a result, the visibility of the fluoroscopic image can be improved, so that a special effect that the diagnostic efficiency can be improved can be obtained.

Further, the C-arm type X of the first embodiment
In the fluoroscopy apparatus, the compression unit of the compression cylinder 21 is moved to a desired position by the support arm rotation mechanism and the compression unit moving mechanism. For example, a bending mechanism that bends the support arm of the conventional compression mechanism is used. And a support arm rotation mechanism, or a telescopic mechanism for expanding and contracting the support arm and a support arm rotation mechanism, or a bending mechanism or an expansion and contraction mechanism combined with the support arm rotation mechanism and the compression unit moving mechanism. By combining the rotating mechanism and the compression part moving mechanism with the bending mechanism and the expansion / contraction mechanism, the rotation by the support arm rotation mechanism and the extension / contraction operation of the support arm by the expansion / contraction mechanism or the rotation by the support arm rotation mechanism without moving the entire compression mechanism. Bending operation of the support arm by the movement and bending mechanism, or rotation and rotation of the support arm rotation mechanism and expansion and contraction operation and bending of the support arm by the expansion / contraction mechanism It is possible to move the pressing portion of the compression unit 21 by a bending movement of the support arm by structure,
The compression part can be moved more quickly. In the case where the support arm blocks the X-ray irradiation field due to expansion and contraction or bending of the support arm, the support arm is made of an X-ray transmitting member such as glass fiber so that the reflection of the support arm can be achieved. Can be prevented.

(Embodiment 2) FIG. 7 is a top view for explaining a schematic configuration of a table side operation device in a C-arm X-ray fluoroscopic apparatus which is an X-ray fluoroscopic apparatus according to Embodiment 2 of the present invention. FIG. 8 is a side view for explaining a schematic configuration of a table side operation device in the C-arm X-ray fluoroscopic apparatus according to the second embodiment, and FIG. 9 is a C-arm X-ray according to the second embodiment. It is a front view for explaining the schematic structure of the table side operation device in the fluoroscopic imaging device.
7 to 9, reference numeral 701 denotes an operation device main body (table side operation means); 702, a storage mechanism; 703, a rotating shaft;
04 is a housing, 705 is a guide rail, 706 is a reversing axis, 707 is a storage bracket, 708 is a top plate support frame, 709
Denotes a top plate (table), 710 denotes a side rail, 711 denotes a clamp, and 712 denotes a plunger. The imaging system, the image processing system, and the control system in the C-arm X-ray fluoroscopic apparatus according to the second embodiment have the same configurations as those in the related art. Therefore, in the following description, the conventional C-arm type X
Only the structure and mounting mechanism of the table side operation device having a different configuration from the fluoroscopic imaging device will be described in detail.

As shown in FIGS. 7 to 9, in the C-arm X-ray fluoroscopic apparatus according to the second embodiment, for example,
A well-known first and second circular columnar body (not shown) orthogonal to each other is formed at 07. On the other hand, the operation device main body 70
A circular hole that fits into the first columnar body is formed at the corner of the first columnar body, and the first columnar body is inserted into a hole formed in the operating device main body 701 to form a well-known rotation mechanism. Is composed. At this time, in the second embodiment, the operating device body 7
A groove formed along the outer peripheral surface of the first columnar body and an inner peripheral portion of the hole of the actuator main body 701 in order to prevent the first columnar body from easily falling out of the hole provided in the actuator body 701. A well-known falling-off prevention mechanism such as fitting a projection provided on the surface is provided. Further, in the second embodiment, a hole is formed at a position orthogonal to the outer periphery of the first columnar body, and a tip of a plunger with a knob (not shown) provided on the operating device main body 701 is formed in this hole. When inserted, it constitutes a well-known rotation restricting mechanism that restricts rotation of the operation device main body 701 and the storage bracket 707.

On the other hand, the second columnar body is
Is rotatably inserted into a hole formed in the hole to form a rotation mechanism. It should be noted that this rotation mechanism also includes the plunger 71
2 are provided. A slide block of a guide rail 705 is attached to the housing 704 in addition to the hole in which the second columnar body is fitted, and this slide block can slide with the guide rail 705 arranged in parallel with the X-axis direction. Are combined.

Next, the storing operation of the table-side operation device in the C-arm X-ray fluoroscopic apparatus according to the second embodiment will be described with reference to FIGS. In the following description, the rotation axis of the first rotation mechanism, which is the rotation mechanism related to the first columnar body provided on the storage bracket 707, is referred to as a turning shaft 703, and is a rotation mechanism related to the second columnar body. The rotation axis of the second rotation mechanism is referred to as a reversing axis 706.

In the operating position (A) of the operating device main body 701 shown in FIGS. 7 to 9, the operating device main body 701 is mounted on the top support frame 708.
Are fixed to the side rails 710 provided on the side surface portions thereof by being clamped by clamps 711. The reversal axis 706 at this time is parallel to the X axis. Therefore, by loosening the clamp 711, the operation device main body 701 is released.
Is rotated 180 degrees about the reversal axis 706 as a rotation center axis,
It is stored on the back side of the top plate 709. FIGS. 7 to 9B show the state at this time.
Is downward (direction opposite to the Z axis). As described above, the plunger (not shown) for restricting the rotation is disposed in the second rotation mechanism. In the actual rotation operation, the user pulls the knob of the plunger (not shown) to rotate the second plunger. The rotation restriction of the rotation mechanism is released. However, in the second embodiment, the operating device main body 701 is
Since the hole into which the plunger (not shown) is inserted is formed in the second pillar at a position rotated by 80 degrees, the second column is formed.
The rotation of the operation device main body 701 by the rotation mechanism is stopped at the position shown in FIG. Therefore, it is possible to prevent the operation device main body 701 from swaying on the back side of the top plate 709.

The turning shaft 703, which is the rotation shaft of the first rotation mechanism connected by the housing 707, remains parallel to the Z axis, as is clear from the drawing. Therefore, as the next evacuation operation, the rotation restriction is released by pulling a plunger (not shown) for restricting the rotation of the first rotation mechanism, so that the operating device main body 701 is moved from the position (B) in the drawing to (C). ) Can be rotated 90 degrees to rotate again. At this time, the operation unit body 701 has the operation surface facing the lower surface, and the longitudinal direction is parallel to the Y axis. As described above, when the subject moves up and down on the top plate 709, the operating device main body 701 is retracted to the position shown in FIG. Contact can be prevented, so that erroneous operation due to the contact can be prevented. Further, by setting the longitudinal direction of the operating device main body 701 in parallel with the Y axis, the width of the operating device main body 701 can be reduced in the longitudinal direction of the top plate 709 related to the X-ray fluoroscopic imaging. The effect that the imaging range can be widened is obtained.

Next, the housing 704 is connected to the guide rail 7.
05 along with the controller body 70
1 is an X-axis direction which is a direction in which the guide rail 705 extends,
That is, the top plate 709 is moved to the position shown by (D) on the side of the support mechanism that supports the cantilever. Also at this position, the translation is restricted by a plunger (not shown). FIG. 8 shows the state of storage at this time. As is clear from FIG. 8, the operating device main body 701 of the second embodiment can be retracted outside the imaging range of the X-ray image. In addition, the moving range of the imaging system in the examination of the digestive system can be increased. That is, the examination and treatment of the digestive system can be performed with the same degree of freedom as the examination and treatment of the circulatory system. Therefore, the examiner can perform a desired X-ray fluoroscopic imaging at a target position and an angle, so that diagnosis efficiency can be improved.

Further, by retracting the operating device main body 701 to the position shown in FIG. 3D, contact with the subject can be completely prevented, so that erroneous operation due to the contact can be completely prevented. Furthermore, since the operation device main body 701 can be easily moved to the operation position shown in FIG. 7A by a procedure reverse to the procedure described above, erroneous operation can be prevented without lowering the operability of the apparatus.

FIG. 10 is a view for explaining a schematic configuration of a clamp mechanism (removal mechanism) of the table side operating device according to the second embodiment, wherein 714 is a base plate, 715 is a clamp shaft, 716 is a clamp plate, and 717. Indicates a knob.

As shown in FIG. 10, the detaching mechanism by the clamp 711 of the C-arm X-ray fluoroscopic apparatus according to the second embodiment is attached to the operation device main body 701 by the base plate 714, and the clamp shaft 715 can be rotated. To support.
A right-hand thread is formed at one end of the clamp shaft 715, and a left-hand thread is formed at the other end. Clamp plates 716 each having a right-hand thread and a left-hand thread are assembled at both ends of the clamp shaft 715. A knob 717 is arranged at one end of the clamp shaft 715. By rotating the knob 717, the clamp shaft 715 is rotated around the axis, and the clamp plate 716 is opened and closed. Therefore, the operating device main body 701
Can be attached to and detached from the side rail 710 without moving the. In particular, the side rail 71 of the operating device body 701
Mounting to zero is possible regardless of the horizontal position or the upside-down position of the top plate 709 because the configuration is such that the thrust generated by screw tightening is used for clamping.

At this time, a power assist switch, which is a power switch for moving the top plate 709 with a driving force of a motor or the like, is provided on the operation device main body 701, so that it is the same as a cate table used for inspection of a circulatory system. Since the positioning of the top plate 709 in the sense of manual operation can be substituted by the driving force of the motor, it is possible to obtain an effect that a desired top plate operation can be performed with a small operation force.

FIG. 11 is a view for explaining a schematic configuration of a C-arm X-ray fluoroscopic apparatus equipped with a table side operation device according to the second embodiment. Reference numeral 1101 denotes an X-ray detector (imaging means); Is a C-shaped arm, 1103 is an X-ray tube device (X-ray source), 1104 is a high voltage generator, 1105 is an image processing device, 1106 is a monitor (display means), 110
7 is a C-arm control device, 1108 is a main body operation unit,
Reference numeral 1109 denotes an operation switch (use instruction means, storage instruction means).

In the C-arm X-ray fluoroscopic apparatus shown in FIG. 11, a C-arm control unit 1107 drives a C-shaped arm 1102 (not shown) based on an operation instruction from a main body operation unit 1108 or a table side operation unit main body 701. An operation instruction is sent to the control means. C-shaped arm 110
The second drive control means controls a drive mechanism (not shown) to
The inclination angle and the slide amount of the character-shaped arm 1102 are set to the operation instruction values. Here, when the start of X-ray fluoroscopy is instructed from the main body operation unit 1108 or the table side operation main body 701, a high voltage is supplied from the high voltage generator 1104 to the X-ray tube apparatus 1103, and the X-ray beam is received. The sample 101 is irradiated. X transmitted through the subject 101
The line is detected as an X-ray transmission image by the X-ray detector 1101 and output to the image processing device 1105. Image processing device 11
Reference numeral 05 denotes a well-known image process for displaying an X-ray transmission image on the display screen of the monitor 1106.

In particular, in the C-arm X-ray fluoroscopic apparatus according to the second embodiment, the first and second rotating mechanisms and the sliding mechanism including the block and the guide rail 705 include, for example, a motor and a gear. A well-known drive mechanism including a mechanism and a well-known control means (moving means) for controlling the operation of the drive mechanism based on the control input are arranged. The input of this control means is an operation switch 1109a arranged on the table side operation device main body 701 and a main body operation unit 1
And an operation switch 1109b disposed on the switch 108.

In the C-arm X-ray fluoroscopic apparatus according to the second embodiment, for example, a use instruction is input from an operation switch 1109a disposed on the table side operation device main body 701 or an operation switch 1109b disposed on the main body operation unit 1108. Then, based on this use instruction, the control means first controls the drive mechanism arranged in the sliding mechanism, and moves the operation device main body 701 from the position shown in FIG. 7D to (C). Move to position. Next, the control means
Is controlled by moving the operating device main body 701 from the position shown in (C) to the position shown in (B).
Rotate degrees. When the rotation is completed, the control means controls the driving mechanism of the first rotation mechanism to rotate the operation device main body 701 from the position shown in (B) to the position shown in (A) by 180 degrees. Thereafter, the control means controls the driving mechanism disposed on the clamp 711 and rotates the clamp shaft 715 so that the side rail 7 is clamped by the clamp plate 716.
Hold 10 However, the table side operation unit body 7
The storage of 01 is the reverse of the procedure described above, and a detailed description thereof will be omitted.

As described above, the operation switches 1109a and 1109b are arranged on the main body operation unit 1108 and / or the table side operation device main body 701, and the first and second rotation mechanisms, the clamp 711,
By providing a drive mechanism for driving the sliding mechanism and a control means for controlling each drive mechanism, the main body operation unit 1108 or the table side operation main body 701 is provided.
By using or storing instructions from the operation switches 1109a and 1109b, the table-side operating device main body 701 can be easily taken out and stored, so that the diagnostic efficiency can be further improved.

As described above, the invention made by the present inventor is:
Although specifically described based on the embodiments of the present invention, the present invention is not limited to the embodiments of the present invention, and it is needless to say that various modifications can be made without departing from the gist of the present invention. .

[0069]

The effects obtained by typical ones of the inventions disclosed in the present application will be briefly described as follows. (1) Operability of the device can be improved. (2) The amount of exposure of the subject can be reduced. (3) Erroneous operation of the table side operation device can be prevented. (4) The moving range of the imaging system can be expanded. (5) The diagnostic efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a schematic configuration of a C-arm X-ray fluoroscopic apparatus which is an X-ray fluoroscopic apparatus according to Embodiment 1 of the present invention;

FIG. 2 is a top view for explaining a schematic configuration of the C-arm X-ray fluoroscopic apparatus according to the first embodiment.

FIG. 3 is a diagram for explaining a mounting position of a compression mechanism according to the first embodiment.

FIG. 4 is a diagram illustrating a schematic configuration of a compression mechanism according to the first embodiment.

FIG. 5 is a top view for explaining a schematic configuration of a console of the first embodiment.

FIG. 6 is a diagram for explaining the operation of the compression mechanism according to the first embodiment.

FIG. 7 is a top view for explaining a schematic configuration of a table side operation device in a C-arm X-ray fluoroscopic apparatus which is an X-ray fluoroscopic apparatus according to Embodiment 2 of the present invention.

FIG. 8 is a side view for explaining a schematic configuration of a table side operation device in the C-arm X-ray fluoroscopic apparatus according to the second embodiment.

FIG. 9 is a front view for explaining a schematic configuration of a table side operation device in the C-arm X-ray fluoroscopic apparatus according to the second embodiment.

FIG. 10 is a diagram illustrating a schematic configuration of a clamp mechanism (removal mechanism) of a table side operation device according to a second embodiment.

FIG. 11 is a view for explaining a schematic configuration of a C-arm X-ray fluoroscopic apparatus equipped with a table side operation device according to a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base part, 2 ... Shaft, 3 ... Support frame, 4 ...
Moving frame, 5: support arm, 6: X-ray image intensifier, 7: rack, 8: X-ray tube device, 9: gantry cover, 10: arm holder, 11: top plate support frame, 1
1a: Projecting portion, 12: Top plate, 13: Rail of linear guide bearing, 14: Rotating shaft, 15: X-ray I. Support frame, 16 ... Cover, 17 ... Stand, 18 ... Bracket, 1
9 ... Mechanism part cover of compression mechanism part, 20 ... Step, 21 ...
Compression cylinder, 22: connecting rod, 23: slide block, 24
... spline shaft, 25 ... moving plate, 26 ... bearing,
27: first chain wheel, 28: latch, 29: first motor bracket, 30: first motor, 31: second chain wheel, 32: first chain, 33a to 33d: third to third Sixth chain wheel, 34 ... mounting bracket, 35 ... seventh chain wheel, 3
6 second motor, 37 second chain, 38 rotary encoder, 39 base plate, 40 linear guide bearing rail, 41 second motor bracket, 4
2 ... gear, 43 ... third motor, 44 ... bearing, 45 ...
Drive screw, 46 ... Linear guide bearing block, 4
7 ... nut, 80 ... operation console, 81 ... operation lever, 82 ...
Knob, 83 ... Push button, 701 ... Control unit body, 70
2 ... storage mechanism, 703 ... revolving shaft, 704 ... housing,
705: guide rail, 706: reversing axis, 707: storage bracket, 708: top plate support frame, 709: top plate, 710: side rail, 711: clamp bracket, 712: plunger, 714: base plate, 715: clamp Axis, 716
... clamp plate, 717 knob, 1101 X-ray detector, 1102 C-shaped arm, 1103 X-ray tube device,
1104: High voltage generator, 1105: Image processing device, 1
106: monitor, 1107: C-arm controller, 110
8: Main unit operation unit, 1109: Operation switch.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Juichi Kita 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Inside Hitachi Medical Corporation (72) Inventor Hiroaki Kudo 5-Senohigashi, Misato-cho, Ikoma-gun, Nara Prefecture 8-8-507 F term (reference) 4C093 AA01 CA18 EA02 EB02 EC16 ED21 EE02

Claims (2)

[Claims] An X-ray source for irradiating a subject with an X-ray beam, an imaging unit for capturing an X-ray image from the X-ray beam transmitted through the subject, and a display unit for displaying the captured X-ray image And a compression unit having a compression unit for compressing a predetermined part of the subject and a support arm for supporting the compression unit at one end, wherein the other end of the support arm is connected to the X A support arm rotating mechanism that rotatably supports on an axis provided in parallel with the center axis of the line beam,
An X-ray fluoroscopic apparatus, comprising: a compression unit moving mechanism configured to move the compression unit in a direction perpendicular to the central axis. 2. A table on which a subject is placed, an X-ray source for irradiating the subject with an X-ray beam, imaging means for capturing an X-ray image from the X-ray beam transmitted through the subject, Display means for displaying an X-ray image; control means for controlling movement conditions of the table, X-ray irradiation conditions of the X-ray source, imaging conditions of the imaging means, and display conditions of the display means; An X-ray fluoroscopic apparatus provided with a table side operation unit provided in the vicinity and setting various conditions in the control unit, wherein: a use instruction unit for giving an instruction to use the table side operation unit; and the table side operation unit. Storage instruction means for giving an instruction to store, and means for moving the table side operation means based on an instruction given from the use instruction means or the storage instruction means. X-ray fluoroscopic imaging apparatus according to claim.