JPS5934078Y2 - Aperture device for surgical fluoroscopy equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an aperture device for a surgical fluoroscopic imaging device.

In medical X-ray equipment, the irradiation field of the image receiving surface (image intensifier, cassette, etc.) of X-rays emitted from the X-ray tube is regulated by the Pharmaceutical Affairs Law so that it does not exceed the image receiving surface.

Therefore, the X-ray device is equipped with a movable diaphragm device with a translucent device, and
The X-ray irradiation field is adjusted to be within the image receiving plane by visually observing the light irradiation field, which is the same as the X-ray irradiation field.

However, with mobile surgical fluoroscopic imaging equipment, if an operating table or the like is inserted between the X-ray tube and the image receiving surface, the X-ray irradiation field cannot be adjusted using the light irradiation field. You can program the blade drive device of the diaphragm device to automatically select the X-ray irradiation field that matches the image-receiving surface, or prepare an irradiation tube that can obtain an X-ray irradiation field that matches the image-receiving surface according to the image-receiving surface. The X-ray irradiation field is changed by changing the irradiation tube.

However, in the former case, the movable aperture device is large, making it inconvenient and expensive as a mobile device.
Moreover, it was not possible to provide a circular irradiation field to the circular image receiving surface of the image intensifier.

Furthermore, in the latter case, the irradiation tube must be replaced every time the X-ray irradiation field changes, which is a hassle.

This idea was created in view of the above circumstances, and the selection of irradiation fields can be controlled remotely (operation on the X-ray control device panel).
It is an object of the present invention to provide an aperture device for a surgical fluoroscopic imaging device that is small and inexpensive.

This invention will be explained below based on the embodiments shown in the accompanying drawings.

As shown in FIG. 1, the mobile fluoroscopic imaging device 1 is provided with an X-ray generator 2 and an X-ray image receiver 3 at both ends of a C-shaped arm, and receives the X-rays from the generator 2 as an image. Photographing is performed by irradiating the device 3 with light.

As shown in FIGS. 2 and 3, an X-ray tube 4 is provided in the X-ray generating device 2, and an aperture is provided between the X-ray tube 4 and the image receiving surface 3a of the X-ray image receiving device 3. A device 5 is installed.

The aperture device 5 includes a hollow regular 2n prism (n is an integer, and n = 3 is selected in this embodiment) 7 with a shaft 6 protruding outward from the center of both bottom surfaces; It is composed of a pair of support plates 8, 8 that are rotatably supported, and a drive device 9 that rotationally drives the prism 7.

As shown in FIG. 3, each of the opposing surfaces of the prism 7 has holes a, a that allow the fibers emitted from the focal point F of the X-ray tube 4 to almost coincide with the image-receiving surface 3a within a range that does not exceed the image-receiving surface 3a. ',
b, b', c, c are formed.

That is, holes a, a', b, b' are formed on the cone formed by connecting the focal point F and the image receiving surface 3a.

c and c' are located respectively.

Note that the reason for providing the holes on the opposing surfaces is to improve the aperture effect.

The prism 7 is covered with a cover 10 that is integrated with the support plate 8, and the cover 10 has a hole 11 through which X-rays emitted from the X-ray tube 4 can pass.

This cover 10 is for preventing scattered X-rays from leaking to the outside.

Note that the prism 7, support plate 8, cover 10, etc. are made of materials with high X-ray absorption, such as iron plates whose surfaces are lined with lead, and the drive device 9 rotates the prism 7 by 1 (T in the example). For example, the prism 7 is arranged such that its axis is perpendicular to the radiation direction of the X-rays.

This invention has the above-mentioned configuration, and has a plurality of holes a, a', b in the prism 7 corresponding to the image-receiving surface that can be photographed.

By setting b', . . ., when the drive device 9 is remotely operated so that the hole corresponds to the image receiving surface, the X-ray irradiation field will match the image receiving surface within a range that does not exceed the image receiving surface. Become.

As described above, according to this invention, multiple rectangular, circular, etc. X-ray irradiation fields can be selected by remote control with a simple configuration, making the operation of the X-ray apparatus very convenient.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a mobile X-ray fluoroscopic imaging device, FIG. 2 is a front sectional view showing an example of this invention, and FIG. 3 is a longitudinal sectional view of FIG. 2. 1...Mobile fluoroscopic imaging device, 2...X
Ray generating device, 3...X-ray image receiving device, 3a...
...Image receiving surface, 4...X-ray tube, 5...
Squeezing device, 6... shaft, 7... square column, 8
... Support plate, 9 ... Drive device, 10.
...Hippo, 11...hole.

Claims (1)

[Scope of utility model registration request] In a surgical fluoroscopic imaging apparatus provided with an X-ray generator and an X-ray image receiver, a positive 2n disposed between an X-ray tube provided in the X-ray generator and an image receiving surface of the X-ray image receiver. A square prism (n is an integer) is provided so that its axis is perpendicular to the X-ray irradiation direction and is rotatable, a pair of holes are formed on the opposite sides of the prism, and the rotation of the prism is controlled by a rotation drive device. A diaphragm device for a surgical fluoroscopic imaging apparatus, characterized in that the hole formed on the opposing side surface substantially coincides with a cone formed by a focal point and an image receiving surface of an X-ray tube.