X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1997-07-02
1999-08-10
Porta, David P.
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 987, H05G 164
Patent
active
059370270
ABSTRACT:
A method and a device for taking digital images in which the exposure time of the object to X or .gamma. rays is controlled and optimized in a way that produces, with each taking of an image, a non-saturated image and minimizes the dose of radiation necessary to produce this image. The device includes at least one image sensor having measurement pixels and pixels. The measurement pixels measure a current representative of a dose of radiation received by the object, and the image pixels are used to form the digital image. The dose of radiation measured by the measurement pixels is compared to a guide-line value, and when this dose measurement reaches the guide-line value the collection of the electrical charge by the image pixels is stopped. The stopping of the collection of the electrical charges is performed without stopping the radiation emission.
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Glasser Francis
Martin Jean-Luc
Thevenin Bernard
Commissariat a l''Energie Atomique
Porta David P.
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