JPS58159733A - Oblique incident angle photography apparatus of medical x-ray apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oblique angle photographing device for a medical X-ray apparatus.

An X-ray fluoroscopic imaging device, for example, a support to which an X-ray source is fixed, is attached to a table, and an imaging device such as a continuous imaging device or an
A table in which a table is supported on a base so that it can be raised and lowered, and which allows oblique angle photography to be taken, has already been provided. In this oblique angle photographing device, a support is rotatably attached to a table and engaged with a fan-shaped guide fixed to the table, so that the support can be tilted along the guide by a drive mechanism on the table.

The problem with such an oblique-angle imaging device is that the area that can be photographed or viewed through during oblique-angle imaging is considerably smaller than that of a normal camera. That is, when the support is rotated, the central axis of the X-ray flux emitted from the X-ray source no longer passes through the center of the film, for example, and a portion of the X-ray flux is deviated from the film, making effective use of the entire film. I can't.

The present invention provides a compact oblique-angle imaging device that can always align the central axis of an X-ray beam with the center of an imaging device.

The oblique angle imaging device of the present invention includes a support supporting an X-ray source;
means for supporting the column so as to permit rotation and axial movement; a support base connected to the column and guided in parallel translation; and a film photographing means disposed on the support base; , a viewing means located below the film taking means and mounted on the support so as to be movable in the direction of movement of the support, and for moving the viewing means over the support in relation to the movement of the support. and means disposed between the support means and the support base and the viewing means.

During oblique angle photography, when the support rotates, the support base is moved in the relative direction and the fluoroscopic means is moved on the support base so that the central axis of the X-ray flux emitted from the X-ray source is aligned with the film photographing means. and can always pass through the center of the viewing means.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the oblique angle photographing device of the present invention will be described below with reference to the accompanying drawings.

In the drawings, 9 indicates a support column, 10 indicates a support stand, and 11 indicates a table. The X-ray source is fixed to the end of the column (not shown). A film photographing means such as a film exchanger is housed in the internal space 10A of the support base, and only the film F in the photographing position is shown in the drawing. Although the top plate on which the subject is placed is not shown, it is placed above the support base and is slidably installed on the table.

A stand 14 with rollers 12 and 13 is attached to the support stand 10. On the other hand, the table 11 has a guide rail 15.
16 was installed. The rows 212 roll on the guide rails 15 and the rows 216 roll on the guide rails 16 so that the support base can be moved in parallel along these rails. A shaft 18 is fixed to the support column 9.

This shaft is held by a bearing 19 on the side of the support and a bearing 2o on the wall inside the support. A guide plate 21 is arranged between the column and the support, and the shaft 18 passes through an elongated hole 22 in this. Further, □The guide plate has a straight groove 23, and a sliding member 24 is fitted so as to slide in this groove. The sliding member is rotatably connected to the slide by a shaft 25 on the column. The column rotates about the axis 25 when the support is moved. However, since the support base can only move in parallel as described above, the support column rotates about the axis 25 and slides the sliding member 24 in the groove 23, in other words, the support column rotates while moving linearly. Therefore, even if the support column rotates, the central axis of the X9 bundle will always pass through the center of the film F in the film exchanger in the support stand due to the movement of the support, and the figure,
The film can be fully utilized even when shooting at oblique angles.

The rotational drive of the column, that is, the movement of the support base is performed by an electric motor 26 on the support base. The rotating shaft of this electric motor is connected to the input shaft of a reducer 27, which is also located on a support base, by a belt and a belt pulley. On the other hand, a substantially five-shaped member 28 is arranged between the support stand and the table. This member is fixed to the guide plate 21. A rack gear 29 is provided on the member 28, and a pinion gear 30 that meshes with the rack gear is fixed to the output shaft of the reducer. When the electric motor 26 rotates the pinion gear 30, the pinion gear rolls while meshing with the rack gear, so that the support base can be moved. In addition, there is a guide rail 1 on the side 28.
5 and 16 is provided.

In this device, the viewing means is disposed below the film photographing means. Transparent means, for example, reference numeral 4 in FIG.
An X-ray fluorescence multiplier indicated by 1 is placed on a support stand f at a distance S from the film F.

Therefore, during oblique angle photography, the central axis of the X-ray flux does not always pass through the center of the X-ray fluorescence multiplier.

do.

The X-ray fluorescence multiplier tube 41 is attached to the support base so that it can move in the same direction as the support base. For this purpose, the X-ray fluorescence multiplier tube is supported by means of rollers 42, 43 on its sides on a rail 45, which is supported on a support member 44 extending from a support base, and on a sliding bearing 51, also on its side.
It is supported by a rail 53 laid on a support member 52 extending from a support base via.

On the other hand, an arm 54 is disposed between the support base 10 and the member 28. This arm is rotatably connected at one end to a shaft 55 on member 28. And in this arm,
As clearly shown in FIG. 3, the other end ζ is provided with a long hole 56 whose end is open, and a long hole 57 is provided near the middle. A shaft 58 on the support is engaged with the elongated hole 57, and an arm 59 extends from the X-ray fluorescence multiplier tube.
A shaft 61 located at is engaged with the elongated hole 56.

When the support base 10 is moved and the support column 9 is rotated during oblique angle photography, the shaft 58 on the support base is moved and the arm 54 is rotated around the shaft 55. Then, the shaft 61 that engages with the long hole 56 of the arm 54 moves in a direction opposite to the direction of rotation of the column, and the X-ray fluorescence multiplier tube is moved. The amount of movement of the X-ray fluorescence multiplier tube can be adjusted regardless of the inclination of the support column 10 by appropriately selecting the ratio of the distance between the shafts 55 and 58 and the distance between the shafts 58 and 61 in the arm 54. The central axis of the X-ray flux can always pass through the center of the input surface of the X-ray fluorescence multiplier tube.

In this oblique angle imaging device, not only can the central axis of the X-ray beam always pass through the center of the film imaging means and the fluoroscopy means when the support is rotated, but also the top plate on which the subject is placed can be When placed on top of the support base,
Only the guide plate protrudes above the top plate, allowing the practitioner to easily approach the subject from both sides of the top plate.

In addition, this oblique-angle imaging device is entirely movably installed on a table, so that fluoroscopy or the imaging site can be determined without moving the subject on the table. For this purpose, an endless chain 61 is disposed on the table as shown in FIG. can be rotated by an electric motor on the table.

Furthermore, the guide plate 21 has a roller 65 as shown in FIG.
It is supported by a guide rail 66 on a support stand via this roller. When the chain 61 is rotated, the support base moves on the table together with the column, and it is possible to perform fluoroscopy or imaging of any part of the subject without moving the subject on the table. Also, when the support column rotates, the support base and the guide plate are connected to the roller 41 and the guide rail 4.
2 allows for relative movement.

As described above, the oblique-angle imaging device of the present invention allows the central axis of the X-ray beam to always pass not only through the center of the film imaging means but also through the center of the fluoroscopy means during oblique-angle imaging.

[Brief explanation of the drawing]

The drawings show an embodiment of the oblique angle photographing device of the present invention, in which Fig. 1 is a front view, Fig. 2 is a sectional view taken along the line U--■ in Fig. It is a cross-sectional view taken along the -■ line. 10... Support stand, 9... Pillar, 21.25-25.
・Supporting means for pillars. Patent applicant Hitachi Medico Co., Ltd. Patent attorney
Masami Akimoto Figure 2 Figure 3 Figure 8

Claims (1)

[Claims] 1. A column for supporting an X-ray source, means for supporting the column for rotation and axial movement, and a support connected to the column and guided for translational translation; The film photographing means disposed on the support base, the transparent means located below the film photographing means and attached to the support base so as to move in the direction of movement of the support base, and the movement of the support base. the support means and means disposed between the support and the see-through means for moving the see-through means over the support base; Oblique insertion of a medical X-ray device, which is moved on a support stand so that the central axis of the X-ray beam emitted from the X-ray source always passes through the center of the film photographing means and the fluoroscopy means. Corner photography device.