JPH0956708A - X-ray diagnostic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stiffness, lightweightendness and damping property of C-shaped arm by filling a damping material in a cavity of approximately C- shaped arm supporting an X-ray generating means and an X-ray detecting means opposing each other. SOLUTION: Damping material 12-1 and 12-2 are injected into a cavity of C-shaped arms 11-1 and 11-2. Foamed urethane, etc., is used as the vibration absorber 12-1 and 12-2. The injection is conducted by filling a material previously foamed or an expandable material to be foamed after filling. By using this constitution, vibration generated at X-ray tube and transferred to C-shaped arm 11-1 and 11-2 is absorbed by the damping material 12-1 and 12-2 filling the cavity of the C-shaped arm and damped out. Thereby, the vibration is not transferred to the X-ray equipment (radiography equipment).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an X-ray tube for generating X-rays and an X-ray detector for detecting X-rays, irradiates the subject with X-rays, and detects X-rays transmitted through the subject. The present invention relates to an X-ray diagnostic apparatus for detecting.

[0002]

2. Description of the Related Art As shown in FIG. 9, an X-ray diagnostic apparatus such as a circulatory X-ray apparatus and a surgical X-ray apparatus includes an X-ray tube device 1 for irradiating an object with X-rays and the object thereof. A C-shaped (arc-shaped) arm (hereinafter referred to as a C-arm) that holds the imaging device 2 that detects the transmitted X-rays and captures an X-ray projection image.
) 3 is provided.

The C-arm 3 rotates in various directions in order to capture X-ray images projected from various directions of the subject placed between the X-ray tube device 1 and the imaging device 2. It is designed to drive. In some cases, a moving operation during surgery is required.

Therefore, the C-arm 3 has high rigidity so that it can hold heavy objects such as the X-ray tube device 1 and the imaging device 2, and it is lightweight because it can be moved quickly.
Moreover, in order to prevent interference with the human body and other devices, the minimum cross-sectional dimension is required.

As a conventional example, FIG. 10 shows an example of the shape of the C-arm 3, and FIG.
Here are two examples. FIG. 11 (a) is a diagram showing an example of a cross section of a C arm 3-1 made of an iron material, and FIG. 11 (b) is an example of a cross section of a C arm 3-2 made of an aluminum alloy. It is a figure.

Since the C-arm 3-1 made of iron material has a relatively large elastic modulus of iron, the cross-sectional dimension can be reduced. In addition, C arm 3 made of aluminum alloy
-2 has advantages such as light weight and good workability.

[0007]

When the C-arm is made of an iron material, iron hardly absorbs the vibration. Therefore, when the arm is formed in a hollow shape, the vibration generated by the cooling fan of the X-ray tube is transmitted to the photographing apparatus. However, there is a problem in that a disturbance such as interference fringes of scanning lines appearing in a captured X-ray image occurs or a vibration sound reverberates into noise. In addition, there is a problem that it takes a long time to stabilize when vibration occurs. Due to this vibration problem, slow start / slow stop control must be performed for driving the C-arm, and there is a problem in that followability is slow and operability is poor in surgery and the like.

When the C arm is made of aluminum alloy, the specific gravity of aluminum is 1/3 that of iron,
Since the modulus of longitudinal elasticity is only 1 / 2.6, there was a problem that the section modulus (section size) had to be made larger than that of the case where it was made of iron. In addition, aluminum alloy is easy to extrude and can be manufactured at low cost, but if a large amount of reinforcing material (as alloy composition) is added to increase rigidity and reduce vibration, it will be bent into C shape (arc shape). However, there is a problem in that the bending accuracy is poor. Also, although aluminum alloy castings absorb vibration well, it is necessary to consider removing the mold during the production process, so the inside of the C arm should be hollow (simple structure).
), It was difficult to reinforce. Therefore, an object of the present invention is to provide an X-ray diagnostic apparatus that can improve the rigidity, lightness, and vibration isolation of the C-arm.

[0009]

The invention according to claim 1 is
An X-ray diagnostic apparatus that includes an X-ray generation unit that generates X-rays and an X-ray detection unit that detects X-rays, irradiates the subject with X-rays, and detects the X-rays that have passed through the subject. A vibration absorbing member that absorbs vibration is injected into an internal cavity of a substantially C-shaped arm that holds the generating unit and the X-ray detecting unit so as to face each other.

The invention according to claim 2 is provided with X-ray generating means for generating X-rays and X-ray detecting means for detecting X-rays.
In an X-ray diagnostic apparatus that irradiates a subject with X-rays and detects the X-rays that have passed through the subject, an inside of a substantially C-shaped arm that holds the X-ray generation unit and the X-ray detection unit facing each other. A vibration prevention member for preventing vibration is fixed to the side surface.

The invention according to claim 3 is provided with X-ray generating means for generating X-rays and X-ray detecting means for detecting X-rays.
In an X-ray diagnostic apparatus that irradiates a subject with X-rays and detects the X-rays that have passed through the subject, a substantially C-shaped arm that holds the X-ray generation unit and the X-ray detection unit in opposition to each other is used. It is manufactured by the lost wax method using the molding method.

The invention according to claim 4 is provided with X-ray generating means for generating X-rays and X-ray detecting means for detecting X-rays.
In an X-ray diagnostic apparatus that irradiates a subject with X-rays and detects the X-rays that have passed through the subject, the inside of the substantially C-shaped arm that holds and holds the X-ray generation means and the X-ray detection means, respectively. , Formed into a net-like structure.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the net-like structure is formed finely in a portion where stress or vibration generated in the arm is large and coarse in a portion where stress or vibration is small. It is a thing. The invention corresponding to claim 6 is the invention according to claim 4, wherein the net-like structure is formed along a plurality of directions not included in one plane.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIG. In the first and subsequent embodiments, the C-arm of the X-ray diagnostic apparatus to which the present invention is applied is the C-arm in the above-described conventional technique (the C-arm made of iron and aluminum Since the outer shape is almost the same as that of the C arm (made of Nume alloy), its description is omitted.

FIG. 1 is a sectional view showing a C-arm to which the present invention is applied. Figure 1 (a) shows C made of iron.
It is a figure which shows the cross section of the arm 11-1, and FIG.1 (b) is a figure which shows the cross section of the C arm 11-2 manufactured with the aluminum alloy.

Vibration absorbing members (for example, urethane foam, polystyrene foam, expandable polyethylene, expandable rubber, etc.) 12-1, 1 are provided in the internal cavities of the C arms 11-1, 11-2.
2-2 was injected.

As the injection method, a method in which the material which has already been foamed is packed in the internal cavity of the C arms 11-1 and 11-2, and a material which is not yet foamed is used in the C arm 11-1,
There is a method of filling the internal cavity of 11-2 by pouring it while pouring it into the internal cavity, but either method may be used.

In the first embodiment having such a structure, for example, the C-arm 11-is generated by an X-ray tube or the like.
The vibrations propagated to 1 and 11-2 are C arms 11-1 and 11-2.
Are absorbed and attenuated by the vibration absorbing members 12-1 and 12-2 injected into the internal cavity of the. Therefore, C-arm 11-1, 1
Vibration does not propagate from 1-2 to the photographic device. The vibration absorbing members 12-1 and 12-2 reinforce the rigidity of the C arms 11-1 and 11-2.

As described above, according to the first embodiment, the vibration absorbing members 12-1 and 12-2 are injected into the internal cavities of the C arms 11-1 and 11-2, so that the C arms 11-
It is possible to absorb the vibration propagating to the 1 and 11-2 and prevent the vibration from propagating to the photographing device and the like, and further, the vibration absorbing members 12-1 and 12-2 reduce the weight to a minimum to increase the C-arm 11 -It is possible to increase the rigidity of 11-2. Therefore,
It is possible to improve the rigidity, lightness, and vibration isolation of the C arms 11-1 and 11-2.

A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a view showing a cross section of a C arm to which the present invention is applied. FIG. 2 (a) is a view showing a cross section of the C arm 13-1 made of an iron material, and FIG. 2 (b) is
It is a figure which shows the cross section of C arm 13-2 manufactured with the aluminum alloy.

Vibration preventing members (for example, rubber, foam aluminum, etc.) are formed on the inner surfaces of the C arms 13-1 and 13-2.
14-1 and 14-2 are attached with an adhesive or an adhesive. In addition, in FIG. 2, the vibration preventing members 14-1 and 14-2 are attached to the portions where the vibration is largely generated. The members 14-1 and 14-2 may be attached. Further, the vibration prevention member 1 is provided on a portion having good workability.
It is also possible to attach 4-1 and 14-2.

In the second embodiment having such a configuration, for example, the propagation of the vibration generated in the X-ray tube or the like to the C arms 13-1 and 13-2 is C arms 13-1 and 13-. It is prevented by the vibration preventing members 14-1 and 14-2 attached to the inner side surface of 2. Therefore, the vibration does not propagate from the C arms 13-1 and 13-2 to the photographing device. Also, the vibration prevention member 14-
1, 14-2 reinforce the rigidity of the C arms 13-1, 13-2.

As described above, according to the second embodiment, the vibration preventing members 14-1 and 14-2 are attached to the entire inner side surfaces of the C arms 13-1 and 13-2.
-1 and 13-2 can be prevented from generating vibration, and the vibration preventing members 14-1 and 14-2 can increase the rigidity of the C arms 13-1 and 13-2 with a minimum weight increase. it can.

Therefore, the rigidity of the C arms 13-1 and 13-2,
It is possible to improve lightness and vibration resistance. A third embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a view showing a cross section of a C arm 21 to which the present invention is applied. The C-arm 21 is made of aluminum alloy by casting, and has a mesh structure (mesh structure) which is conventionally hollow inside. That is, inside the C arm 21, an inner wall (which forms a continuous surface in the circumferential direction of the C arm 21) for dividing the cavity into a plurality is provided.

An example of a method of manufacturing the C-arm 21 having the mesh structure will be described below. This manufacturing method uses the lost wax method using the stereolithography method.
As shown in Fig. 4 (a), the shape of the final finished product is produced by a stereolithography method (ultraviolet ray) using an ultraviolet curing epoxy resin.
The same resin mold 31 as (shape of C arm 21) is manufactured.
In this stereolithography method, any resin can be used as long as it is a resin that is cured by ultraviolet rays and disappears at a high temperature.

Next, as shown in FIG. 4B, the resin mold 31 is used as a male mold and a female mold 32 is formed by the lost wax method.
To produce. That is, ceramics or the like is sprayed onto the male resin mold 31 and then sintered at a high temperature. This time,
Since the resin mold 31 disappears at a high temperature, FIG.
As shown in, only the female mold 32 remains.

Next, as shown in FIG. 5 (a), a molten aluminum alloy (zinc alloy or the like) 33 is poured into the remaining female mold 32 and cooled. After the cooling, the female mold 32 made of ceramics is removed mechanically or using a solvent. Then, as shown in FIG. 5B, the aluminum alloy 33 having a mesh structure, that is, the C arm 21 remains.

In the third embodiment having such a structure, the C-arm 21 is made of an aluminum alloy (zinc alloy or the like), and since the aluminum alloy has a high vibration absorbing property, the C-arm is made. The vibration generated at 21 is C
It is absorbed by the outer wall of the arm 21 and the mesh structure portion inside. Further, the mesh structure portion inside the C arm 21 reinforces the rigidity of the C arm 21.

As described above, according to the third embodiment, an aluminum alloy (zinc alloy, etc.) having a high vibration absorption property is used.
By making the inside of the C-arm 21 of) a mesh structure, the rigidity of the C-arm 21 can be enhanced with a minimum weight increase. Therefore, it is possible to improve the rigidity, lightness, and vibration isolation of the C-arm 21.

A fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment shows three modified examples of the above-described third embodiment.
FIG. 6 shows C arms 41, 42, 43 to which the present invention is applied.
FIG. Note that, in FIG. 6, the mesh structure is simply represented by lines, and in reality, as shown in FIG. 5, it is a structure having a thickness continuous with the outer wall. 6 (a) shows a honeycomb structure of the mesh structure inside the C-arm 41, FIG. 6 (b) shows a mesh structure inside the C-arm 42, and FIG. 6 (c) shows c. The mesh structure inside the arm 43 is a rectangular structure.

As described above, according to the fourth embodiment, the same effect as that of the above-described third embodiment can be obtained. Further, it is possible to obtain the effect that the rigidity characteristics of the C-arm according to the type of each mesh structure can be obtained. For example, it is possible to obtain the effect of having a directional characteristic as reinforcement of the rigidity of the C-arm.

The above-described third embodiment and fourth embodiment
Although the four types of mesh structures inside the C-arm have been described in the embodiment of the present invention, the present invention is not limited to this, and any shape may be used as long as the shape is suitable for the purpose of increasing the rigidity of the C-arm. It may be a geometric structure or an irregular structure with no regularity.

A fifth embodiment of the present invention will be described with reference to FIG. The fifth embodiment is the same as the third embodiment and the fourth embodiment described above, except that C
Although the mesh structure inside the arm has been described as an inner wall (plate shape) continuous in the circumferential direction parallel to the outer wall, it is formed in a beam shape (rod shape) as shown in FIG. 7.

Therefore, the mesh structure of each type of the above-described third and fourth embodiments, and the mesh structure of other conceivable types and irregular structures are formed in a beam shape. . As described above, according to the fifth embodiment, it is possible to obtain the same effects as those of the above-described third embodiment and fourth embodiment, and obtain the effect of further excellent lightweightness. be able to.

A sixth embodiment of the present invention will be described with reference to FIG. In addition, in the sixth embodiment, each of the mesh structures of the third embodiment, the fourth embodiment, and the fifth embodiment described above has a stress applied to the C arm more than other portions. The mesh structure is finely and densely formed in the high portion, and the mesh structure is coarsely and sparsely formed in the low stress portion.

As shown in FIG. 8, the mesh structure is made fine and dense with respect to the corner portion of the C arm 51 to which stress is applied. Further, the mesh structure is finely and densely formed on the side surface (the surface which does not form an arc) of the C arm 51.

In the sixth embodiment having such a configuration, the fine and dense mesh structure opposes the corner portion and the flat side surface portion where the stress applied to the C arm 51 is high, and the stress is increased. A coarse sparse mesh structure opposes the lower arcuate flanks.

As described above, according to the eighth embodiment, it is possible to obtain the same effects as those of the above-described third, fourth and fifth embodiments, and further, Since the mesh structure is efficiently formed, it is possible to obtain an effect that there is no useless portion, the rigidity is high, and the weight is excellent.

[0039]

As described above in detail, according to the present invention,
It is possible to provide an X-ray diagnostic apparatus that can improve the rigidity, lightness, and vibration isolation of the C-arm.

[Brief description of drawings]

FIG. 1 is a diagram showing a cross section of a C-arm of an X-ray diagnostic apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a cross section of a C-arm of an X-ray diagnostic apparatus according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a cross section of a C-arm of an X-ray diagnostic apparatus according to a third embodiment of the present invention.

FIG. 4 is the first half 3 of the production process of the C-arm of the same embodiment.
The figure which shows the cross section of C arm for demonstrating one process.

FIG. 5 is the second half of the production process of the C-arm of the same embodiment.
The figure which shows the cross section of C arm for demonstrating one process.

FIG. 6 is a diagram showing a cross section of a C-arm of an X-ray diagnostic apparatus according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view including a partial cross section showing a C-arm of an X-ray diagnostic apparatus according to a fifth embodiment of the present invention.

FIG. 8 is a diagram showing a cross section of a C-arm of an X-ray diagnostic apparatus according to a sixth embodiment of the present invention.

FIG. 9 is a perspective view showing a main part of the X-ray diagnostic apparatus.

FIG. 10 is a perspective view showing an example of a C-arm of the X-ray diagnostic apparatus.

FIG. 11 is a view showing a cross section of a C-arm of a conventional X-ray diagnostic apparatus.

[Explanation of symbols]

 11-1, 11-2, 13-1, 13-2, 21 (33), 41, 42, 43, 51 ... C-arm, 12-1, 12-2 ... Vibration absorbing member, 14-1, 14- 2 ... Vibration prevention member.

Claims (6)

[Claims] 1. An X-ray diagnostic system, comprising: an X-ray generator for generating X-rays; and an X-ray detector for detecting X-rays. The subject is irradiated with X-rays and the X-rays transmitted through the subject are detected. In the apparatus, an X-ray diagnosis is characterized in that a vibration absorbing member for absorbing vibration is injected into an internal cavity of a substantially C-shaped arm that holds the X-ray generating unit and the X-ray detecting unit so as to face each other. apparatus. 2. An X-ray diagnostic system, comprising: an X-ray generator for generating X-rays; and an X-ray detector for detecting X-rays, irradiating the subject with X-rays, and detecting X-rays transmitted through the subject. In the apparatus, an X-ray diagnosis is characterized in that a vibration prevention member for preventing vibration is fixed to the inner side surface of a substantially C-shaped arm that holds the X-ray generation unit and the X-ray detection unit so as to face each other. apparatus. 3. An X-ray diagnostic system comprising an X-ray generator for generating X-rays and an X-ray detector for detecting X-rays, irradiating the subject with X-rays, and detecting X-rays transmitted through the subject. In the apparatus, an X-ray diagnostic apparatus is characterized in that a substantially C-shaped arm for holding the X-ray generation means and the X-ray detection means in opposition to each other is manufactured by a lost wax method utilizing an optical molding method. 4. An X-ray diagnostic system, comprising: an X-ray generator for generating X-rays; and an X-ray detector for detecting X-rays. The subject is irradiated with X-rays and the X-rays transmitted through the subject are detected. In the apparatus, the inside of the substantially C-shaped arm that holds the X-ray generation unit and the X-ray detection unit facing each other is formed in a net-like structure. 5. The X-ray diagnostic apparatus according to claim 4,
The X-ray diagnostic apparatus is characterized in that the reticulated structure is formed finely in a portion where stress or vibration generated in the arm is large and coarse in a portion where stress or vibration is small. 6. The X-ray diagnostic apparatus according to claim 4,
The X-ray diagnostic apparatus according to claim 1, wherein the mesh structure is formed along a plurality of directions not included in one plane.