JPH0910193A - X-ray diagnostic apparatus - Google Patents

Abstract

PURPOSE: To restrict wearing attributed to a slide running by improving the layout of a running path for sliding to form a structure allowed to be miniaturized in a relatively simple manner. CONSTITUTION: A C arm holder of an X-ray diagnostic apparatus is provided with a C arm 10 to hold an X-ray source and an image receiving system thereof at positions mutually opposed to each other so as to sandwich a specimen, a support body (comprising a holder 30 and a strut) to support the C arm 10 through a plurality of holding rollers 31...31 and a slide driving section 32 to slide the arm 10 to the support body along the circular arc direction made by the arm 10. An opening part (groove) OP having a shoulder 12 for functioning as a running path SP for sliding is provided on the side of the arm 10 facing the holder 30 and the arm 10 is mounted slidably on the holder 30 through the shoulder 12. The C arm 10 is made of an aluminum alloy and at least contact surfaces of the holding rollers 31...31 are made of a resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray diagnostic apparatus, and more particularly to an arcuate arm structure for holding an X-ray source and its image receiving system.

[0002]

2. Description of the Related Art Conventionally, in an X-ray imaging apparatus for acquiring an X-ray image of a subject, an X-ray apparatus for irradiating an X-ray beam and an image receiving system for making the transmitted X-ray beam incident on the X-ray apparatus face each other. As an X-ray imaging system holding device to hold,
An arc-shaped arm member such as a C-shape (hereinafter, "C arm")
Called) is known.

An X-ray imaging system holding device equipped with this C-arm (hereinafter referred to as "C-arm holding device") is shown in FIG.
As shown in, X is taken from various directions without moving the subject P.
The X-ray apparatus 100 and its image receiving system 101 for radiography.
In addition to the C-arm 102 to which is attached, a holder 104 and a ceiling-mounted column 105 are provided as a support body 103 that slidably supports the C-arm 102. With these configurations, the C-arm holding device slides the C-arm 102 in the arcuate direction with respect to the support body 103, so that the X-ray apparatus 100 and the image receiving system 101 thereof can be moved to a desired position for the subject P. Move to a position that has a shooting angle.

For example, in the arrangement shown in FIG. 6 (arranged on the head side along the axial direction of the examinee), the C-arm holding device is mounted on the holder 1 by the rotating mechanism built in the column 105.
C supported by the holder 104 around the axial direction of 04.
While rotating the arm 102, the slide driving unit 106 (see FIG. 7) built in the holder 104 slides the C-arm 102 with respect to the holder 104 in the arcuate direction.

Here, as a method for slidably holding the C-arm 102, for example, a method shown in FIGS. 7A and 7B is known. FIG. 7A shows the C arm 10.
For holding the slide, which is rotatably attached to the holder 104, a convex portion is provided on the rear surface side (holder side) of two side faces in a direction orthogonal to the circular arc direction of 2 and the convex portion is used as the slide travel path 107. This is a method of sandwiching and holding by a roller (hereinafter, referred to as “holding roller”) 108. Further, in FIG. 6B, convex portions are provided on both end sides of the two side surfaces of the C-arm 102, and the facing surface sides of the convex portions are provided on the slide traveling path 1.
No. 07, a holding roller 108 is arranged and held between the slide traveling paths 107.

In either method, the holding roller 10
In order to hold the center of the C-arm 102 so as not to move with respect to the subject P, the C-arm 102 and the column 10 are provided.
It is fixed to a holder 104 that connects 5 and 5. Further, the main part of the slide drive unit 106 is arranged in the holder 104.

Further, C including the slide running path 107
Since the arm 102 is usually made of steel (stainless steel) -based material, the holding roller 108 is also made of steel-based material so that it can withstand the high surface pressure generated during traveling of the slide travel path 107. To be done. Also, the C arm 102
Regarding the above, there is also known one processed with a light alloy such as an aluminum alloy in order to reduce the weight.

[0008]

However, in the above-mentioned conventional C-arm holding device, the holding roller 10 is used.
There is a physical restriction due to the fact that the traveling path 107 on which the No. 4 should travel is arranged outside the C-arm 102, and the shape of the holder 104 is held from the back side to the side of the C-arm 102 under this restriction. I had to set it to cover. Therefore, at least the width of the holder 104 itself in the direction orthogonal to the arcuate direction increases by the width covering the side surface of the C-arm 102, which increases the overall width of the X-ray diagnostic apparatus.

In particular, as shown in FIG.
Since the outer surface that covers the side surface from the back surface of the C-arm passes through the inside of the holder 104 when sliding, the C-arm device 110 such as a dust hose or clamp in which signal line cables and the like are stored in a bundle is the inner peripheral surface. It is necessary to directly attach the holding frame 111 to the side or to attach to a separate holding frame 111 that is provided so as to project from the inner peripheral surface side to the outside of the holder 104. In any case, the device 110 must be mounted in a floating state so that it can pass through the outside of the holder 104, which causes a problem that the size of the entire device is further increased.

[0010] Such an increase in the size of the C-arm holding device not only makes it impossible to lay out the device in a space-constrained place, but also increases the visual sense of oppression, so that the patient undergoing the examination will have a greater sense of oppression. Very psychologically, it's not good.

Furthermore, not only in the width direction but also in depth (thickness)
Regarding the direction as well, since the outer periphery of the C-arm 102 has a closed cross section, there is a physical restriction that the slide drive unit 106 has to be laid out on the outer side thereof.

On the other hand, since the C-arm 102 and the holding roller 108 are made of steel, they are easily worn during sliding travel, and the abrasion powder generated thereby violates the clean area, and the operation of wiping the abrasion powder during maintenance is required. It was requested frequently and was not always easy to use.

Although the above-mentioned light alloy C-arm 102 is already known, it is not particularly conscious of the wear state caused by the slide running.

The present invention has been made in consideration of the above-mentioned problems of the prior art, and provides an X-ray diagnostic apparatus in which the arrangement of the slide travel path is improved and a structure that can be downsized is constructed relatively easily. This is the first purpose.

A second object of the present invention is to provide an X-ray diagnostic apparatus capable of suppressing wear caused by sliding running.

[0016]

In order to achieve the first object, an X-ray diagnostic apparatus according to the invention of claim 1 is
An X-ray source that irradiates the subject with X-rays, an imaging unit that captures an X-ray image that has passed through the subject, and an arc shape that supports the X-ray source and the imaging unit so as to face each other. Arm, a slide mechanism that slides the arm along the arc direction, and a support body that supports the slide mechanism. The arm is configured to have a groove on its back surface. At least a part of the slide mechanism is provided in the groove.

According to the second aspect of the present invention, the arm has a shoulder body that projects toward the inside of the groove, and the slide mechanism has a roller that slidably holds the shoulder body.

Further, in the invention according to claim 3, the shoulder body is a shoulder body projecting parallel to the back surface of the arm.

In the invention according to claim 4, the arm is an integrally formed arm.

According to the fifth aspect of the present invention, the support is configured such that the width of the support in the direction orthogonal to the arc of the arm is substantially equal to the width of the back surface of the arm.

Further, in the invention according to claim 6, the slide mechanism includes a motor and a reduction mechanism for reducing the rotation of the motor, and at least a part of the reduction mechanism is inserted into the groove. Has been done.

In the invention according to claim 7, the contact surface of the roller is made of resin.

In order to achieve the second object, the invention as set forth in claim 8
An X-ray diagnostic apparatus according to the described invention is an X-ray source that irradiates an X-ray toward a subject, an imaging unit that captures an X-ray image transmitted through the subject, the X-ray source and the imaging. An arcuate arm that supports the means so as to face each other, and a slide mechanism that has a roller that movably holds a part of the arm and that slides the arm along the arc direction.
The arm is made of an aluminum alloy and the contact surface of the roller is made of resin.

In the invention according to claim 9, the resin is a polyamide resin.

[0025]

In the X-ray diagnostic apparatus according to the present invention, since the groove is formed on the back surface of the arm and at least a part of the slide mechanism is provided in the groove, the arm can be slid. The holding structure can be constructed relatively simply by only the back side without surrounding the side of the arm.

Further, X according to the inventions of claims 8 and 9
In the line diagnostic device, an arm made of an aluminum alloy is slid by a slide mechanism via a roller having a contact surface made of resin with respect to the support.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the present invention is applied to, for example, an X-ray imaging apparatus for a circulatory organ.

The X-ray imaging apparatus shown in FIG. 1 comprises a bed 1 on which a subject P is placed, and a C-arm holding device 2 for acquiring an X-ray image of the subject P placed on the bed 1. Further, this X-ray imaging apparatus has a predetermined controller (not shown) for controlling the operations of the bed 1 and the C-arm holding device 2.
It has.

The C-arm holding device 2 is, for example, of a ceiling-mounted type, and has an X-ray device (at least an X-ray source is provided at a position opposite to each other across the subject P placed on the bed 1 as another configuration. For example, an X-ray diaphragm or the like) 3 and an image receiving system thereof (including at least an X-ray detector and composed of, for example, an image intensifier, an optical system, a TV camera, etc.) 4
Is provided with a C arm 10 that holds the C arm 10 and a support body 20 that slidably supports the C arm 10. The support body 20 includes a holder 30 that slidably supports the C-arm 10 along its arcuate direction, and a column 4 that rotatably supports the holder 30 along its axial direction.
0 and the column 40 thereof is attached to the ceiling in the room.

The principle of the arm structure according to the present invention will be described with reference to FIG.

In the conventional C-arm structure, the slide travel path is formed outward in the direction orthogonal to the arcuate direction. However, in this C-arm structure, the holder 30 covers the outside of the C-arm. In view of this, in the present invention, the C for forming the slide traveling path is formed inward in the direction orthogonal to the arcuate direction of the C arm.
The arm structure was constructed.

That is, when the C-arm 10 is viewed in the cross section along the radial direction shown in FIG. 2, the diagnostic surface P1 on the inner peripheral side, the rear surface P2 on the outer peripheral side, and the two side surfaces P are provided on the outer surface.
3 and P3, a groove is formed on the back surface P2 therein, and at least a part of the slide mechanism can be arranged in the groove. For example, as shown in FIG. 2, this C-arm structure has a base body 11 extending in an arc shape, and a base body 11 that extends from the side facing the holder 30 to the holder 30 side and extends in the arc shape. It is formed of a shoulder body 12 for a slide traveling path formed by bending inward in a direction orthogonal to the direction to form a groove (hereinafter, represented by an "opening") OP. The shoulder body 12 is formed so as to project in parallel to the back surface P2 of the C arm 10, for example.

Now, returning to the embodiment, the C-arm 10
As shown in FIGS. 3 and 4, is integrally formed of a base body 11 and shoulder bodies 12 and 12 that form an opening OP, and is formed by extrusion from a light alloy material (extrusion material) such as aluminum. ing. Here, the two shoulder bodies 12, 1
2, slide paths SP, SP are formed,
The C-arm 10 is provided through the slide travel paths SP, SP.
Is slidably attached to the holder 30. In addition to the opening OP, the C-arm 10 is also provided with hollow portions H1 and H1 for inserting the signal line 13 such as a coaxial cable, and hollow portions H2 and H2 for weight reduction (thinning). .

The holder 30 has a substantially T-shaped main body having a width capable of covering at least the slide running paths 13 and 13, for example, the same width as the C-arm 10 or a width smaller than that, and within the main body. 31 are attached to the C-arm side of the slide roller. Also,
The holder 30 is provided with a slide driving unit 32 that slides the C-arm 10 along its arcuate direction.

As shown in FIG. 4, the holding rollers 31 ... 31 are provided with support members 33, 3 fixed to the upper and lower portions of the main body.
3, the traveling paths SP, SP for sliding the C-arm 10
It is rotatably supported at a position sandwiching it about an axis in a direction orthogonal to the arcuate direction. Here, at least the contact surface of the holding rollers 31 ... 31 is formed of a resin that is made of 6-nylon (polyamide resin) and that is made of industrial-use plastic such as monocast nylon, which has high strength and high abrasion resistance. . This is because, in the selection of the material of the roller, attention was paid to a material capable of suppressing an increase in the surface pressure that causes the generation of abrasion powder with respect to the sliding traveling paths SP of the light alloy C arm 10 and SP.

As shown in FIG. 4, the slide drive unit 32 is a drive mechanism based on belt transmission, and is an induction motor or servo motor that operates based on a drive signal from a control unit (not shown). Drive motor 34, and the drive shaft of the drive motor 34, the belt transmission unit 3
4a, a speed reducer (reduction mechanism) 35 for decelerating the rotation of the motor, and a belt transmission portion 3 that is different from the speed reducer 35.
5a, and a belt drive device 36 for sliding having a toothed pulley 36a and a power transmission belt 36b that meshes with the toothed pulley 36a. Power transmission belt 3
Both ends of 6b in the longitudinal direction are aligned with the bottom surface in the opening OP of the C arm 20 via rollers 36c, 36c that are rotatably supported at two upper and lower positions in the main body.
It is fixed to the mounting portions 15, 15 on both ends of the (see FIG. 1).

The support column 40 is provided with a drive mechanism (not shown) including a drive motor or the like which operates in response to a drive signal from the control unit in its main body, and the power transmission shaft of the drive mechanism is connected to the holder 30. There is. Therefore, the drive mechanism rotates the C-arm 10 around the axial direction of the holder 30.

Next, the overall operation of this embodiment will be described.

First, the X-ray diagnostic system is activated, and the bed 1
It is assumed that the operator gives a command to the C-arm holding device 2 in order to perform X-ray imaging by the X-ray device 3 and the image receiving system 4 from the desired imaging position on the region of interest of the subject P at the diagnosis position of. In response to this command, the slide drive unit 32 is driven, and the power from the drive motor 34 is transmitted to the slide transmission device 36 via the speed reducer 35. As a result, the rotational force of the toothed pulley 36a is transmitted to the C arm 10 via the power transmission belt 36b, and the C arm 10 is slid with respect to the holder 20 via the slide travel path SP. 31. During this slide, due to the characteristics such as high wear resistance and elastic deformation of the resin holding rollers 31 ... 31, an increase in surface pressure on the slide paths 13, 13 made of light alloy is suppressed.

As described above, in this embodiment, paying attention to the arrangement of the slide traveling path in the C-arm structure, the C arm is provided with the shoulder body forming the opening, and the shoulder body is used as the slide traveling path. It is possible to construct a simple holder structure that does not surround the side surface of the arm.

Therefore, it is possible to freely use the side surface side where the arrangement of the device is difficult due to the structural limitation of the C-arm as an empty space (exposed portion), and thus, for example, contact safety on the open side surface side. Since a safety device such as a switch can be provided over the entire circumference, the reliability of the device is improved, and the choices in the layout design regarding the attachment device for the C arm can be greatly expanded.

Since the side surface is not enclosed, the width L1 of the holder can be made smaller than in the conventional case, as shown in FIG. 5 (a).
For example, it can be set equal to or less than that of the C arm. As a result, as shown in FIG. 5B, the width of the mounting frame 50 can also be reduced (see width L2 in the figure). Therefore, the entire apparatus can be made compact, and the holder does not project from the C-arm, so that the range of action of a person (operator, caregiver, etc.) standing around the C-arm can be expanded. Further, since it is almost impossible to visually feel the pressure, it is possible to design the image that a patient or the like receives when looking at the device to be gentler.

Further, since the shoulder body 12 forming the opening is provided on the holder side of the C-arm, the slide drive unit 32 can be inserted into the opening OP as shown in FIG. 5 (a). Therefore, the slide drive unit, which is conventionally laid out entirely on the outside of the C-arm, can be housed in the C-arm, whereby the thickness (total height) of the holder can be set small. Therefore, not only the width of the holder but also its thickness can be reduced, and for example, the radial distance from the rotation center of the C arm to the support can be shortened, and in particular, the C distance can be increased around the vertical axis passing through the rotation center.
In the holding device having the third shaft for rotating the arm, the area occupied during the rotating operation of the device can be reduced because the radius of rotation is reduced.

Since the holder can be made compact in this way, the width and depth of the entire device can be made smaller, and a design that is relatively less squeezed than the conventional one and that is visually friendly can be constructed, and a small indoor space can be constructed. However, since the devices can be arranged sufficiently, the layout property of the device is significantly improved.

Further, in the above embodiment, the C arm is molded from an extruded material using a light alloy such as an aluminum material,
Since the resin-made holding roller is provided for the light-alloy C-arm, in addition to the advantage that the C-arm can be reduced in weight, the elastic deformation characteristics of the holding roller can suppress an increase in surface pressure related to slide travel. As a result, it is possible to significantly suppress the occurrence of abrasion powder. Therefore, it is possible to almost avoid the situation that the clean area is contaminated by the abrasion powder, for example, the situation that the abrasion powder falls on the patient during the operation.
The burden on the operator is also greatly reduced. Further, since it is possible to save the trouble of frequently wiping off the abrasion powder, the maintainability is greatly improved.

Further, due to the elastic characteristic of the holding roller, the running sound itself at the time of sliding becomes smaller than that of the contact between metal members, and the quality is improved from this point. Further, since the traveling sound can be absorbed even if the sliding traveling path has some irregularities, the sliding traveling path does not necessarily have to be processed into a smooth surface such as a cutting surface. For example, no cutting is possible. . Therefore, the cutting process for the slide travel path can be simplified or omitted, and the productivity can be improved from this point as well, and the device can be provided at a relatively low cost.

Although the C-arm is integrally formed in this embodiment, the present invention is not necessarily limited to this. For example, if there is no problem in strength, the base body and the shoulder body are separated. It may be processed as a body.

Further, in the present embodiment, two shoulder bodies forming the C-arm are provided, but the present invention is not necessarily limited to this, and at least the side facing the holder is orthogonal to the arcuate direction. One may be used as long as it is bent inward and the bent portion can function as a slide travel path. Further, the shoulder body may have any shape as long as the bent portion can function as a slide travel path.

Further, in this embodiment, the C using the "C arm" as an arc-shaped member for holding the X-ray apparatus and the image receiving system.
Although applied to the arm holding device, the present invention is not necessarily limited to this. For example, the invention can be applied to a sliding portion of a holding device that uses a ceiling-mounted "Ω arm" as an arc-shaped member. In this case, as an effect of thinning the C-arm, there is an advantage that the installation height of the ceiling can be lowered.

Further, in the present embodiment, the C-arm holding device is a ceiling-mounted type, but the present invention is not necessarily limited to this, and may be a floor-mounted type.

Further, although the holding roller is made of resin in this embodiment, the present invention is not necessarily limited to this. For example, a light alloy such as aluminum equivalent to the C-arm is equivalent to the above. The effect can be exerted.

[0052]

As described above, in the X-ray diagnostic apparatus according to the invention described in claims 1 to 7, a groove is provided on the back surface of the arm, and at least a part of the slide mechanism is provided in the groove. Therefore, you can hold the arm only on the back side of the arm,
This makes it possible to construct a compact structure in which the side surface of the arm is not surrounded, and it is possible to reduce the size of the entire apparatus and also to effectively utilize the side surface, which has become an empty space, for example.

Further, X according to the invention described in claims 8 and 9
In the line diagnostic device, since the arm is made of aluminum alloy and the contact surface of the roller is made of resin, it is possible to greatly suppress wear caused by sliding travel of the arm.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing the overall configuration of an X-ray imaging apparatus (X-ray diagnostic apparatus according to the present invention) according to an embodiment.

FIG. 2 is a schematic sectional view illustrating the principle of the arm structure of the present invention.

FIG. 3 is a schematic sectional view taken along the line AA of FIG.

FIG. 4 is a schematic perspective view showing a main configuration of a C-arm holding device.

5A and 5B are views for explaining the effect of downsizing of the device as compared with the related art, FIG. 5A is an explanatory view of the holder itself, and FIG. 5B is an explanatory view including a mounting frame.

FIG. 6 is a schematic side view showing a main part configuration of a conventional X-ray diagnostic apparatus.

FIG. 7 is a schematic cross-sectional view taken along the line BB of FIG.
(A) is sectional drawing which arrange | positioned the roller in the position which sandwiches the slide traveling path, (b) is sectional drawing which arrange | positions the roller between the slide traveling paths.

FIG. 8 is a schematic sectional view illustrating a conventional mounting frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bed 2 C arm holding device 3 X-ray device 4 Image receiving system 10 C arm (forms the arm of the present invention) 11 Base body 12, 12 Shoulder body 13 Signal line OP opening (groove) SP slide travel paths H1, H1 Hollow part (for signal line insertion) H2, H2 Hollow part (for meat removal) 20 Support (forms the support of the present invention) 30 Holders 31 ... 31 Holding roller 32 Slide drive unit (slide mechanism of the present invention) 33, 33 support member (for holding roller) 34 drive motor 34a belt transmission part (between drive motor and reducer) 35 reducer 35a belt transmission part (between reduction device and belt transmission device) 36 belt transmission device 36a toothed pulley 36b Power transmission belt 40 prop

Claims (9)

[Claims] 1. An X-ray source that irradiates an X-ray toward a subject, an imaging unit that captures an X-ray image transmitted through the subject, and the X-ray source and the imaging unit face each other. In an X-ray diagnostic apparatus including an arcuate arm that supports the arm, a slide mechanism that slides the arm along the arc direction, and a support that supports the slide mechanism, the arm has a groove formed on its back surface. The X-ray diagnostic apparatus according to claim 1, wherein at least a part of the slide mechanism is provided in the groove. 2. The X according to claim 1, wherein the arm includes a shoulder body that projects toward the groove, and the slide mechanism includes a roller that slidably holds the shoulder body.
Line diagnostic device. 3. The X-ray diagnostic apparatus according to claim 2, wherein the shoulder body is a shoulder body that projects in parallel with a back surface of the arm. 4. The X-ray diagnostic apparatus according to claim 2, wherein the arm is an integrally formed arm. 5. The support according to claim 2, wherein a width of the support member in a direction orthogonal to a circular arc direction of the arm is substantially equal to a width of a back surface of the arm. The described X-ray diagnostic apparatus. 6. The slide mechanism according to claim 2, wherein the slide mechanism includes a motor and a reduction mechanism that reduces the rotation of the motor, and at least a part of the reduction mechanism is configured to be inserted into the groove. Item 6. The X-ray diagnostic apparatus according to any one of items 5. 7. The X-ray diagnostic apparatus according to claim 2, wherein a contact surface of the roller is made of resin. 8. An X-ray source that irradiates an X-ray toward a subject, an imaging unit that captures an X-ray image transmitted through the subject, and the X-ray source and the imaging unit face each other. An arc-shaped arm that supports the arm, a slide mechanism that has a roller that movably clamps a part of the arm, and slides the arm along the arc direction, and a support that supports the slide mechanism. In the provided X-ray diagnostic device,
The X-ray diagnostic apparatus is characterized in that the arm is made of aluminum alloy and the contact surface of the roller is made of resin. 9. The X-ray diagnostic apparatus according to claim 8, wherein the resin is a polyamide resin.