JPH0338939Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an X-ray tube device, and particularly relates to an improvement of an X-ray emission port.

[Technical background of the invention and its problems]

Conventionally, an X-ray tube device used for stereoscopic, magnification, general radiography, etc. has a plurality of X-ray focal points F 1 , F ₂ at different positions on an anode target 11, as shown in FIGS. _{1 and 2} . X-ray tube 12 with (2 locations)
a plurality of X-ray emission ports 13, called Haube, corresponding to the X-ray beam path emitted from each X-ray focal point;
14 is housed in a container 15.
When in use, a device 16 for specifying the X-ray irradiation field, such as a collimator, is placed at a predetermined X-ray radiation port depending on the imaging.
combine.

However, in conventional X-ray tube devices, when the X-ray focus is switched from F ₁ to F ₂ for imaging, the outer surfaces of the X-ray emission ports 13 and 14 are formed flat, so it is difficult to install the X-ray tube device. To align the diaphragm device 16, etc. of the medical dormitory equipment, first move the diaphragm device 16 in the lateral direction, and then rotate the container 15 around the center axis O of rotational movement of the container 15 as shown by arrow P. Again it is necessary to connect the diaphragm device 16 to the X-ray emission aperture. Therefore, the switching operation is complicated;
Furthermore, poor positioning accuracy may cause leakage of X-rays.

[Purpose of invention]

The purpose of this invention is to provide an X-ray tube device that allows smooth and easy correct alignment of medical equipment and an X-ray emission port.

[Summary of the idea]

This idea consists of housing an X-ray tube in which a plurality of X-ray focal points are formed at different positions in a container provided with an X-ray emission port at a position corresponding to each X-ray focal point, and This is an X-ray tube device in which the outer surface of the radiation emitting port is formed as part of a circumferential surface having a constant radius of curvature from the central axis of rotation of the container.

[Example of idea]

The X-ray tube device of this invention is constructed as shown in Figs. 3 and 4, and the conventional example (Figs. 1 and 2)
The same parts are denoted by the same reference numerals. An X-ray tube 12 having a plurality of X-ray focal points F ₁ and F ₂ at different positions on an anode target 11 is connected to a container 15 called a Haube.
is housed within. This container 15 has a plurality of, _for example, _two
Line emission ports 21 and 22 are provided. In this case, the outer surfaces 21a, 22 of each X-ray emission port 21, 22
a are formed on the same circumference with a constant radius of curvature R from the rotational movement center axis O of the container 15.

[Effect of idea]

According to this invention, a plurality of X-ray radiation ports 21, 2
Since the outer surfaces 21a and 22a of the container 15 are formed with a constant radius of curvature from the center axis of the rotational movement of the container 15, when switching the X-ray focal point used from F ₁ to, for example, the focal point F ₂ for stereo imaging, the container 15 can be It is only necessary to rotate and move as shown by the arrow P, and the positioning of the two can be performed smoothly, easily, and with high accuracy without moving the aperture device 16 of the medical device.

Incidentally, FIG. 5 shows a modification of this invention, and the same effect as the above embodiment can be obtained. That is, in this modification, the container 15 is connected to a plurality of X-ray emission ports 2.
The X-ray tube 12 is divided into a portion 15a where the tubes 1 and 22 are located, and portions 15b and 15c other than the respective portions.
The structure is such that it can be rotated and moved relative to the latter. In addition, 23 and 24 in the figure
is Patsuking.

[Brief explanation of the drawing]

1 and 2 are a perspective view and a side view showing a conventional structure, FIGS. 3 and 4 are a perspective view and a side view showing an X-ray tube device according to an embodiment of the invention, and FIG.
The figure is a schematic sectional view showing a modification of this invention. 11... Anode target, 12... X-ray tube, 1
5... Container, 21, 22... X-ray emission port, O...
Center axis of rotational movement of the container, R...radius of curvature.

Claims (1)

[Claims for utility model registration]
In an X-ray tube device in which a ray tube is accommodated in a container provided with X-ray radiation ports at positions corresponding to the respective X-ray focal points, the outer surface of each of the X-ray radiation ports is rotated by the container. An X-ray tube device characterized in that it is formed as a part of a circumferential surface having a constant radius of curvature from a central axis.