Distortion correction circuit for scintillation camera - esp. Auger camera collecting gamma rays from human organs in medical investigations, and using electronic processor to correct distortion

摘要

The camera includes a scintillation crystal, photomultipliers, and an electronic circuit providing analogue signals(x',y') corresp. with the gamma rays received by the camera. Signals (x',y') are fed into a distortion correction circuit, which contains an inlet interface circuit, a processor, and an output interface circuit which feeds corrected signals(x,y) to a TV image tube. In the inlet interface circuit, converters change the analogue signals (x',y') to corresp. digital signals(X',Y') with a format(n) less than the min.(N) for correction. The digital signals are formed into words which are sampled to provide corrected signals(X",Y"). In the output circuit are converters changing the digital signals(X",Y") to the corrected analogue signals(x,y). Used esp. with an Anger camera described in US 3432660 & 3852603 and FR 2160933. The present invention uses inexpensive standard formats, e.g. of 8 bits.