Radiation camera exposure control

Details Radiation camera exposure control Radiation camera exposure control

H - Electricity

05

G

358/11.2

H05G 1/44 (2006.01)

Patent

CA 1037617

Abstract of the Disclosure A system and method for governing the exposure of an image generated by a radiation camera to an image sensing camera is disclosed. The exposure is terminated in response to the ac- cumulation of a predetermined quantity of radiation, defining a radiation density, occurring in a predetermined area. An index is produced which represents the value of that quantity of radia- tion whose accumulation causes the exposure termination. The value of the predetermined radiation quantity represented by the index is sensed so that the radiation camera image intensity can be calibrated to compensate for changes in exposure amounts due to desired variations in radiation density of the exposure, to maintain the detectability of the image by the image sensing camera nothwithstanding such variations. Provision is also made for calibrating the image intensity in accordance with the sensi- tivity of the image sensing camera, and for locating the index for maintaining its detectability and causing the proper center- ing of the radiation camera image.

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