X-ray or gamma ray systems or devices – Nonphotographic detector support
Reexamination Certificate
1999-12-09
2001-04-10
Kim, Robert H. (Department: 2882)
X-ray or gamma ray systems or devices
Nonphotographic detector support
C378S098800
Reexamination Certificate
active
06213637
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an image receiver for a radiology system, particularly a solid-state detector, of the type having a raster that can be arranged in front of the receiver plane in the beam path and that can be moved into a standby position out of the beam path when not in use.
2. Description of the Prior Art
Target devices are known wherein the raster or film used to generate static radiographic exposures is movable to a position outside of the X-ray beam path for operating the imaging device in a fluoroscopic mode, so as to reduce the generation of stray radiation in the fluoroscopic mode. Usually the static image receiver is moved to the standby mode outside of the beam path by a motor.
With solid-state technology, it has become possible to construct considerably more compact image receivers and therefore more compact X-ray pick-up and fluoroscopy devices. In these smaller devices, however, the lateral standby space for the raster, that was unproblematically present in the conventional large-volume target devices, no longer exists.
SUMMARY OF THE INVENTION
It is an object of the invention to construct an image receiver of the above described type wherein it is possible to move the raster in an idle (standby) position without compromising the compact design.
This object is inventively achieved in an image receiver for a radiologically system having a raster and a standby receptacle mount for the raster in the receiver housing, preferably on the side of the recording cassette that faces away from the radiation source.
The placement of the raster in a standby position thus is inventively accomplished not by a mere lateral sliding into a standby receptacle that is arranged next to the image receiver, nor is it necessary to remove the raster from the device and store it somewhere else in a cabinet, where it is not available sufficiently promptly or cannot be found quickly enough or can be damaged. Instead, the raster is moved into a standby position at the compact image receiver, this position being substantially congruent to the usage position, but on the side of the image receiver facing away from the radiation source.
In an embodiment of the image receiver housing such that the raster can be placed on the bottom of the receiver housing. In one position, it is located in the path of the X-ray source, and upon reattaching it is located on the underside and accommodated in its standby position in a space-efficient manner with out the necessity of laterally extending the housing and without being located in the beam path.
In a further embodiment of the invention, guides for pushing in the raster into the working position and into the standby position, that is parallel to the working position, are connected to one another by connecting guide arcs. This embodiment functions simply and reliably, since it is impossible for the raster to be lost or misplaced or for it to de dropped. The raster is pulled out of the guides in the working position, for instance with a handle, and it slides downwardly along the connecting guide arcs, whereupon it can be pushed into the standby position. The change in the opposite direction proceeds just as simply and reliably.
In a further embodiment, this shifting from the working plane into the standby plane, which are respectively arranged on opposite sides of the solid-state detector, takes place inside a closed expansion bellows, so that the raster is not exposed during the change of positions and thus remains protected. For the position change, the expansion bellows is extended (by hand or by motor), then the change of planes occurs, and, when this is completed, the expanding bellows is pushed in again, so that, having no notable lateral space requirement, the compact structure of the image receiver is not compromised.
REFERENCES:
patent: 3936642 (1976-02-01), Lajus et al.
patent: 3988583 (1976-10-01), fukase et al.
patent: 5185772 (1993-02-01), Shirouzu et al.
patent: PS 67 025 (1969-05-01), None
Kiknadze Irakli
Kim Robert H.
Schiff & Hardin & Waite
Siemens Aktiengesellschaft
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