JPH0585175B2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field The present invention relates to an X-ray tomography apparatus.

B. Prior Art In an X-ray tomography system, it is extremely useful to add an II (image intensifier) to the cassette telegraph system. For example, when using a quick-shooting device with an II that is used in a fluoroscopic photography table, the mechanism (hereinafter referred to as (referred to as a sub-drive mechanism) is built into the device.

C. Problems to be Solved by the Invention Therefore, since the carriage, which is the unit that transports the film to the photographing position, moves over a long distance, it is difficult to make the main body of the apparatus more compact. Furthermore, since the carriage is placed directly above II, the heights of the film surface and II fluorescence incidence surface cannot be made to match. Therefore, some kind of correction is required when determining the cutting surface by remote control. Furthermore, since the transparent image becomes an enlarged image, the image quality will deteriorate.

D Means for Solving the Problems In order to achieve the above problems, the configuration of the present invention is as follows. That is, a swinging shaft having a horizontal axis provided on the vertical frame of the apparatus main body, a swinging rod swingably supported by the swinging shaft, and an X-ray tube disposed at one end of the swinging rod. and a mask grid disposed at the other end of the swinging rod so as to be slidable in the lengthwise direction of the rod and movable within one plane, and further facing the X-ray tube with a top plate in between. a mask grid drive unit; an imaging mechanism having a cassetteless photographing device and an image intensifier positioned below the mask grid and arranged in parallel in the longitudinal direction of the top plate; a support mechanism that supports the mask grid so as to be integrally movable in the longitudinal direction; and a linking and moving mechanism that connects the mask grid drive section and the imaging mechanism and moves the imaging mechanism with respect to the mask grid. That's true.

E Effect When the rocking rod moves in the vertical plane, the mask/grid drive moves left and right. At the same time, the photographic equipment
II also moves left and right as a unit. When the connecting movement mechanism is activated, the imaging device and
II are moved so that they are each positioned directly below the mask grid.

F. Embodiment Hereinafter, embodiments of the present invention will be described based on an embodiment shown in the drawings.

In FIGS. 1 and 2, the gist of this device is that a cassette telegraph device 9, II 10 is integrally placed on a rectangular frame 1a of the device main body 1 via a moving frame 8, and a mask grid 7a, The top plate 2 is located directly above it. A swinging shaft 4 having a horizontal axis is provided on the vertical frame 1b of the apparatus main body so as to be movable up and down via its support portion 3, and a swinging rod 5 is supported on the swinging shaft 4 so as to be swingable in a vertical plane. be done. An X-ray tube 6 having a commeritor is mounted on the upper end of the swing rod 5, and a mask/grid drive section 7 is mounted on the lower end. Mask grid 7a is fixed to upper arm 7b. Further, this mask/grid drive section 7 is slidable in the longitudinal direction of the swing rod 5, and the third and fourth rails 8 are always placed on the moving frame 8.
e, 8f, the grid roller 12 of the lower arm 7c
It is posted via.

Now, the movable frame 8 is placed on the underframe 1a of the apparatus main body so as to be slidable in the front and rear directions. Moving frame 8
has a horizontally long rectangular shape in plan view, and rollers 8b are provided on the vertical sides of the movable frame 8, which sandwich rails 1c from above and below, which protrude from the inside surfaces of the vertical sides along the front-back direction of the underframe 1a.

On the moving frame 8, first and second rails 8c, 8d are installed.
are provided in the left and right direction, a trolley 11 is placed on them, and an imaging mechanism consisting of a cassette telegraph device 9 and II 10 is integrally placed on the left and right sides.

A connecting and moving mechanism 13 is interposed between the mask/grid driving section 7 and the cassette-less photographing device 9. That is, a nut member 13a is provided protruding from the driving portion 7, and a threaded rod 13b screwed into the nut member 13a is connected to the photographing device 9.
It is installed long in the left and right direction on the rear surface of the. Then, the threaded rod is rotated by a motor (not shown) provided in the photographing device 9.

The operating state will be explained above. When the swing rod 5 swings in a vertical plane, the mask/grid drive section 7 moves left and right on the moving frame 8. At the same time, the photographing device 9 and II 10 also move left and right as one. When the connecting movement mechanism 13 is activated, the photographing device 9 and II 10 move relative to the mask/grid drive section 7.
Each is located directly below the mask grid 7a.

When the swing rod 5 moves two-dimensionally, the moving frame 8 moves in the front and rear directions on the underframe 1a.

The mask/grid driving section 7 sets the mask to an opening degree that matches the film size of the divided photographing during divided photographing. At this time, the connecting and moving mechanism 13 moves the imaging mechanism, that is, the cassetteless imaging device 9, to a position where the center of the irradiation field defined by the mask and the center of the divided size film coincide. Furthermore, when the swinging rod 5 (X-ray tube) moves in two dimensions such as in a circle or an ellipse, the grid driving section 7 gives the grid a solar motion so that the grid does not cut off the X-rays.

Note that when the top plate moves up and down, the pivot axis may be fixed. In addition, the swing rod 5, the mask/grid drive section 7, the top plate 2, the photographing device 9, the II 10,
The present invention is also applicable to a type in which the movable frame 8 and the underframe 1a as a whole rotate around a horizontal axis.

The present invention is not limited to the embodiments and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.

G. Effects of the Invention According to the configuration of the present invention, since the II and the cassette telegraphing device are integrated on the left and right sides, the dimensions occupied by these in the longitudinal direction and the height direction of the top plate are shortened.
In addition, since the heights of the film surface and the II fluorescence incident surface can be matched, it is now possible to adjust the cut surface by remote control without correction. Moreover, there is no longer any deterioration in image quality due to image enlargement during fluoroscopy.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a right side view. 1...Body, 1a...Underframe, 1b...Vertical frame, 1
c... Rail, 2... Top plate, 3... Swinging shaft support section, 4... Swinging shaft, 5... Swinging rod, 6... X-ray tube, 7... Mask/grid drive section, 7a...Mask grid, 7b...Upper arm, 7c...Lower arm, 8...Movement frame, 8a...Main body, 8b...
Roller, 8c...first rail, 8d...second rail, 8e...third rail, 8f...fourth rail,
9... Cassetteless photographing device, 10... II, 1
1... Trolley, 11a... Car body, 11b... Wheels,
12...Grid roller, 13...Connection moving mechanism, 13a...Nut member, 13b...Threaded rod.

Claims (1)

[Claims] 1. A swinging shaft with a horizontal axis provided on the vertical frame of the apparatus main body, a swinging rod swingably supported by the swinging shaft, and an X-ray tube disposed at one end of the swinging rod. ,
A mask having a mask grid disposed at the other end of the swinging rod so as to be slidable in the lengthwise direction of the rod and movable within one plane, and further facing the X-ray tube with a top plate in between. a grid driving unit; an imaging mechanism having a cassette telegraphing device and an image intensifier located below the mask grid and arranged in parallel in the longitudinal direction of the top plate;
A support mechanism that supports the imaging mechanism so as to be integrally movable in the longitudinal direction of the top plate, and a support mechanism that connects the mask grid drive unit and the imaging mechanism, and moves the imaging mechanism with respect to the mask grid. An X-ray tomography apparatus characterized by comprising a connecting and moving mechanism.