Large-Field-of-View Image-Intensifier Gamma-Camera Detectors Using a Silicon X y Scintillation Localizer

Two years ago, a gamma camera detector, consisting of a 34 cm input field image intensifier coupled to a scintillator crystal at the input and to a silicon localizer at the output, was built and tested at Thomson-CSF. Snce that time the 34-cm model has been further developed, and a 40 cm model using an improved silicon localizer has been built and tested. This paper discusses the performances of the two cameras, and explains how the localizer output signal is processed to obtain gain uniformity and low geometrical distortion.