JPH029776Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a compression device for a medical X-ray apparatus.

[Conventional technology]

In a medical X-ray device, a so-called X-ray fluoroscopy table,
When examining a subject's digestive organs, such as the stomach, using X-ray fluoroscopy or X-ray photography, a compression tube made of a material with good X-ray transparency, such as wood or carbon fiber-reinforced epoxy resin, is used. The stomach is compressed by pressing from the surface of the subject, deforming the stomach, and diffusing a contrast agent to examine areas that cannot be seen with examination methods that do not use a compression tube.

This compression tube is attached to a compression mechanism fixed to the X-ray fluoroscopy table, and the compression mechanism allows
It is inserted into the center of the X-ray irradiation field by turning from a retracted position outside the radiation field, and is lowered to compress the subject. However, with this type of device, the compression tube is simply pressed against the stomach, and operations such as compression by palpation are not possible, making it impossible to obtain an image suitable for the purpose of the examination. For this reason, it is currently necessary to compensate for this by skilled imaging techniques, such as moving the top plate up, down, or sideways when viewed from the subject (referred to as a "squeezing compression operation") while compressing the stomach with a compression tube.

[The problem that the idea aims to solve]

However, the power of the drive source that moves the top of the fluoroscopic imaging table is so large that it can be obtained by moving the total load of the subject and the top. There was a risk of injury to the ribs.

An object of the present invention is to provide a compression device that can easily and safely obtain images suitable for examination purposes.

[Means to solve the problem]

The above problem is to support the compression tube with the support arm, and to
A compression position and X-ray imaging in which the support arm is given rotational motion and linear motion by the moving mechanism, and the compression cylinder is pressed against the X-ray imaging region of the subject lying on the top plate of the medical X-ray apparatus. In a compression device of a medical X-ray apparatus that is moved between a retracted position outside an irradiation field, a second moving mechanism is provided for rotating the compression tube around an axis parallel to a central axis of the compression tube, and the compression tube is This problem is solved by making it possible to shift the subject in a direction substantially parallel to the long axis of the top plate within a plane parallel to the top plate surface while applying a compressive force to the subject.

[Effect]

When a compression operation is performed, the first moving mechanism applies a rotational movement and a linear movement to the support arm, thereby moving the compression cylinder from the previously retracted position to the imaging area of the subject on the top plate of the medical X-ray apparatus. After moving upward, the compression tube contacts the subject, reaches the compression position, applies a predetermined compression force to the subject, and then stops. In this state, the second
When the moving mechanism is operated, the compression tube rotates around an axis parallel to the central axis of the compression tube while still applying compression force to the subject, and moves the top plate in a plane parallel to the top plate surface. move in a direction approximately parallel to the long axis of.

By moving this compression tube while applying compression force to the subject, the contrast medium within the subject is moved and the organs are squeezed, and minute lesions within the organs are sequentially revealed in the direction of movement of the compression tube. It becomes possible to forget. In addition to this movement of the compression tube, by simultaneously moving the top plate left and right, it becomes possible to squeeze in any direction more safely than before.

〔Example〕

An embodiment of the compression device of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the X-ray fluoroscopic imaging table itself is a known one, and includes a table 11 supported by a base 12 such that it can be raised and lowered, and an X-ray source 13 attached to a support 14 fixed to the side of the table. Imaging means such as a film photographing device and a fluorescent intensifier tube are provided in the table below the top plate. The main body 15 of the compression device is attached to the column 14, and the compression mechanism inside the compression device main body 15 moves the compression tube 16 parallel to the use position shown in the figure (in the center of the X-ray irradiation field) and the top plate. It is designed so that it can be raised and lowered while rotating around a shaft 35 between a retracted position (located outside the X-ray irradiation field) and a retracted position (outside the X-ray irradiation field).

In the present invention, the compression device is attached to the column so as to be rotatable for compression around an axis parallel to the central axis of the compression tube. Figure 2 shows the details. The main body 15 of the compression device is rotatably supported on the column 14 by shafts 22, 23 parallel to the central axis 35 of the compression tube. The pillar 14 has bearing plates 24, 2
5, and a bearing is fixed to each bearing plate. The body is mounted on a column such that its shafts 22, 23 are held in bearings, thereby allowing rotation about an axis parallel to the central axis 35 of the compression tube. This rotation mechanism is composed of a spur gear 26 fixed to a shaft 22, an electric motor 27 attached to the inside of the support column 14, and a spur gear 28 attached to the rotating shaft of the electric motor 27 and meshing with the spur gear 26. There is.

The compression tube 16 is normally placed in a retracted position parallel to the top plate, and when in use, it is lowered and rotated above the top plate (at the center of the X-ray irradiation field) to compress the subject lying on the top plate. In the compression device according to the present invention, since the entire compression device is rotatable around an axis parallel to the central axis of the compression tube, the compression device can be deformed according to the purpose of the examination while still compressing the area to be imaged. That is, after the compression tube 16 is compressed by the subject, the electric motor 27 is rotated, the gear 28 rotates the gear 26, and the main body 15 is rotated about the shafts 22 and 23. The compression tube 16 can be deformed in various ways in a state in which the region to be photographed is expanded. Conventionally, such imaging has been done by moving a top plate with large inertia up and down and left and right while pressing a compression tube against the area to be imaged. Since it is difficult to give a precise movement, it is difficult to obtain a compression image desired by a good operator. However, with the compression device of the present invention, compression imaging of the gastrointestinal tract using a compression tube requires a four-section film (horizontal) when the target area is, for example, the stomach.
Since the image is taken in four parts (10" x 12" vertically), the distance that the compression tube can be moved in the long axis direction of the top plate is about 5 cm to 10 cm, so it is not possible to move the top plate up and down using the conventional method. Alternative movements can be obtained by rotating the main body 15, making it possible to make subtle deformations depending on the part to be imaged, and also to match the horizontal movement (back and forth movement when viewed from the operator's side) of the top plate. Therefore, it is possible to easily perform photographing according to the purpose of the examination.

Figures 3 to 5 show details of the compression mechanism. A rail member 31 is laid inside the main body 15 along its longitudinal direction. The moving table 32 has two sets of rollers 3, one pair on each side thereof.
3 and 34, and by fitting the rail member 31 between each set of rollers, the rail member 3
It is now possible to move along 1. A central shaft 35 is attached to the movable table 32 so as to be rotatable and prevented from moving in the axial direction. A guide pipe 36 is attached to cover the rail member 31. A grooved cam 37 is formed on this guide pipe 36, and a follower 38 consisting of a roller is attached to a pin fixed to the central shaft 35. The grooved cam 37 is formed so that when the movable table 32 is lowered, the central shaft 35 is rotated by a certain angle and lowered by a follower 28 attached to the central shaft 35, which descends together with the movable table 32. The compression tube 16 is fixed to a holder extending horizontally from the end of the central shaft 35, and is lowered together with the central shaft 35 while pivoting from the retracted position to the compression position on the top plate as the central shaft 35 rotates. Ru. The moving table 32 is raised and lowered by the rail member 3.
1 and an electric motor 41 at the top of the guide pipe 36 wind up or unwind the rope 43. A winding drum 42 is fixed to the output shaft of the electric motor 41. The rope 43 has both ends connected to a counterweight 44, is wound around and fixed to the winding drum 42, is fixed to the movable table 32, and is further wound around a pulley 45 provided at the lower end of the rail member 31. When the output shaft of the electric motor 41 is rotated, the rope 43 is moved and the movable table 32 is raised and lowered along the rail member 31, whereby the central shaft 35 is rotated by the grooved cam 37 and raised and lowered. Note that the counterweight 44 is a U-shaped cross-sectional member 4 fixed to the rail member 31.
It is guided by a rail 48 that runs between 6 and 47.

On the other hand, a pedestal 50 is fixed to the upper ends of the rail member 31 and the guide pipe 36. Support plate 51,5
2 is provided on the pedestal. The electric motor 41 is provided with a shaft 53 in a casing that is located on the same line as the output shaft and houses the stator. Output shaft and shaft 53
are held by bearings on support plates 51 and 52, and thereby the electric motor 41 can rotate around these axes. A coil spring 54 is disposed between a member 55 fixed to the electric motor 41 and a pedestal 50,
The electric motor is to be rotated in the direction in which the rope 43 is pulled out, that is, in the counterclockwise direction in FIG. 3. However, the member fixed to the electric motor 41 comes into contact with the member fixed to the pedestal, and rotation in this direction is prevented. For this reason, the electric motor 41 uses the coil spring 54
It can only be rotated counterclockwise against the Compression tube 1
6 is crimped onto the subject and the compression force reaches a set value, for example about 9 kgf, the stator of the electric motor 41 is rotated about the output shaft and the shaft 53 against the coil spring 54. The shaft 53 is provided with an operating rod 56,
A switch 57 is provided on the support plate 52. The operating rod 56 operates a switch 57 by rotation of the stator, and this switch 57 cuts off the power to the electric motor 41. Since the electric motor 41 itself is, for example, a geared motor, the rotor is hardly rotated by rotation from the output shaft side. Therefore, the compression tube 16 is held while being pressed against the subject by stopping the electric motor 41. When the electric current is cut off, the stator of the electric motor 41 is reversed by the coil spring 54, and the operating rod 56 is separated from the switch 57.
1 is maintained in the stopped state until it is reversed by the next operation of the manual switch. When the electric motor 41 is reversed, the winding drum 42 winds up the rope 43, and the movable table 32 moves the rail member 3.
1, and the compression cylinder 16 rotates toward the retracted position and rises, moving away from the subject. When the compression tube 16 rises to the retracted position, a switch 58 on a mounting plate fixed to the pedestal 50 moves the movable table 32
The compression tube 16 is actuated by an actuating rod 59 provided thereon, and the electric motor 41 is de-energized, and the movement of the compression tube 16 is stopped.

[Effect of idea]

As described above, the compression device of the present invention is attached to an X-ray apparatus so as to be rotatable around an axis parallel to the central axis of the compression tube, and is attached to the top plate surface while the compression tube is compressing the imaged area of the subject. Since it is possible to move approximately parallel to the long axis direction of the top board in a parallel plane, it is possible to apply pressure in the long axis direction of the top board without having to move the top board up and down. The safety can be improved compared to the method using this method, and by using the horizontal movement of the top plate in combination, it is possible to obtain a squeezing image in a direction according to the purpose of the examination.

[Brief explanation of the drawing]

The drawings show an embodiment of the compression device of the present invention; FIG. 1 is a perspective view showing the state assembled into an X-ray device, FIG. 2 is an enlarged side view of the compression device,
3 is a side view of a portion of the compression mechanism in section, FIG. 4 is a front view of an upper portion of the compression mechanism, and FIG. 5 is a sectional view taken along the line of FIG. 3. 11-14...X-ray device, 15...Compression device main body, 16...Compression tube, 22, 23...Rotation shaft, 2
6... Spur gear, 27... Electric motor, 28... Spur gear.

Claims (1)

[Scope of utility model registration request] A compression tube is supported by a support arm, and a first moving mechanism applies rotational movement and linear movement to the support arm;
A medical X-ray device in which the compression cylinder is moved between a compression position for pressing an X-ray imaging region of a subject lying on a top plate of a medical X-ray apparatus and a retreat position outside the X-ray imaging field.
In the compression device of the X-ray device, a second moving mechanism is provided for rotating the compression tube around an axis parallel to the central axis of the compression tube, and the compression tube is moved to the top plate while applying a compressive force to the subject. A compression device for a medical X-ray apparatus, characterized in that the compression device can be moved in a direction substantially parallel to the long axis of a top plate in a plane parallel to the plane.