X-ray or gamma ray systems or devices – Accessory – Alignment
Patent
1998-01-23
2000-08-22
Porta, David P.
X-ray or gamma ray systems or devices
Accessory
Alignment
378 988, G21K 104
Patent
active
061061522
ABSTRACT:
An X-ray exposure apparatus has an x-ray radiator having an X-ray tube provided with collimators for the limitation of a radiated X-ray beam. The x-ray radiator can be displaced translationally and/or rotated angularly for the orientation in space of the radiation beam. A digital image receiver has a number pixels, and there is no mechanical connection between the image receiver and the x-ray radiator. A sampling unit samples the signals of the image receiver in order to determine which pixels are irradiated by the radiation beam in a test exposure and dependent thereon, control signals are emitted to adjustment unit and/or to a radiator collimator displacement and/or rotation control unit, which, dependent on the control signals, adjust the collimators or the position of the x-ray radiator in relation to the image receiver, and/or move the x-ray radiator parallel to the image receiver for the optimal adjustment of the beam thereto. Alternatively, the signals from the sampling unit can be used to produce on a display screen an image of the radiation field on the image receiver, so that, using this image, an optimal adjustment of the radiation field to the image plate is enabled by means of manual adjustment of collimators and/or by means of manual displacement and/or orientation of the radiating head. In a test exposure of a patient, an image of the outer contours of the patient can be obtained on the display screen, together with the image of the radiation field on the image plate, after which the radiation field is matched to the outer contours of the patient using this image.
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Dunn Drew A.
Porta David P.
Siemens Elema AB
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