DE7102644U - ROENTGEN TARGET OR CASSETTE CHANGER - Google Patents

Description

COOK & STERZEL
LIMITED PARTNERSHIP

Essen, January 21, 1971 Mö / Ps

X-ray aiming device or cassette changer

The innovation concerns an X-ray target device or a cassette changer with an electronic or * electron-optical one Image intensifier, in which X-rays alternately and fluoroscopy using the image intensifier be made, wherein means are provided to move the image intensifier so that it is in fluoroscopic with its entrance screen in or in front of the recording level, when taking pictures, however, to create space to retract the cassette with its fluorescent entrance screen

is behind the recording level, according to the patent (open

Legungsschrift P 19 kj 526.8), whereby the input fluorescent screen is connected to the device bringing the cassette into the receiving field via appropriate means in such a way that when the cassette enters the receiving field, the input fluorescent screen of the image intensifier inevitably moves out of the receiving plane or at Moving out the cassette can be moved into the receiving plane.

Such devices are designed to enable a quick change from fluoroscopy to exposure, whereby the images should have optimal contour sharpness during recording and fluoroscopy.

Both. previously known devices, the image intensifier behind the patient positioning

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table in uAiaiei RiehUMg schic -!} hnr an ^ pordn ^ t. Since image intensifiers of this type, in particular electron-optical image intensifiers, have a relatively large mass, a rather complex drive and a relatively long time are required for the movement of the image intensifier.

With the main application, a remedy was proposed in the manner that the image intensifier is arranged rigidly and the input fluorescent screen through the cassette carriage is inevitably moved out of the recording plane.

The fluorescent entrance screen is by means of spring elements attached to the image intensifier. This could result in adjustment difficulties with regard to the distance between optics and a luminescent screen.

The present innovation is based on the task to create an X-ray aiming device or a cassette changer according to the main application, with the input fluorescent screen is held exactly in the recording plane. According to the innovation, the object is achieved in that the image intensifier mounted pivotably approximately in its center of gravity axis lying perpendicular to the direction of movement of the cassette is.

In further training of the innovation it is proposed that the. Image intensifier to keep them in the functional level via spring elements and to provide means via which the image intensifier

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710284 ^ .27.5.71

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middle of a curved one provided on the cassette carriage Device is pivoted from the recording plane.

In the drawing, an embodiment of the innovation is shown purely schematically.

The patient support table for the patient's body 2 is designated by 1, above which the X-ray line is arranged. Below the storage table. ot an anti-scatter diaphragm h is provided, under which the image intensifier 5, which is provided with an input luminescent screen 8 and a camera 6, is fastened so as to be pivotable in its center of gravity axis lying perpendicular to the direction of movement of the cassette. The image intensifier 5 is provided with lugs 10 by means of which the image intensifier 5 is held in its functional area by means of spring elements 9. In addition, the image intensifier 5 has rolling members 11 which are fastened via brackets 12. When the cassette 1 * t is moved in, the rolling elements 11 are moved via the transport device 13, which is provided with a curved surface 15, in such a way that the image intensifier 5 pivots out of the functional plane. When the cassette 1 ^ is moved out, the equilibrium is then re-established via the spring elements 9, the image intensifier 5 being unloaded in its most common functional level.

71026 ^ 5/27/71

Claims (3)

Protection claims 1.) Ix tgenzielgeiät or cassette changer with an electronic or electron-optical image intensifier, in which X-ray exposures and X-ray fluoroscopy by means of the image intensifier are made alternately, with means being provided to move the image intensifier so that it is in or in front of the recording plane during fluoroscopy with its input screen , on the other hand, when taking pictures to create space for moving a cassette with its entrance lamp behind the receiving plane, according to patent ...... (laid- open specification P 19 hj 526.8), the entrance screen with the device that brings the cassette into the receiving field has appropriate means is connected in such a way that when the cassette is retracted into the recording field, the entrance lampshade of the image intensifier inevitably moves out of the recording plane or when the cassette is moved into the recording plane, characterized in that the image intensifier is approximately in its lower position right to the direction of movement of the cassette center of gravity is pivotally attached. 2.) X-ray target device or cassette changer according to claim 1, characterized in that the image intensifier has Spring elements is held in its functional level. 71026A427.5. 71 / 2 3.) X-ray target device or cassette changer according to claim 1, known by the fact that the transport device for the cassette expands a curved surface, when the cassette is moved in via rolling elements provided on the image intensifier, the same out of the Function level swings out.