New imaging probe with crystals integrated in the collimator's square holes

This work presents the results obtained with a new generation portable gamma camera, assembled with an innovative technique based oil CsI(Tl) scintillation crystals inserted into the square holes of a tungsten collimator. Characterization measurements have been performed on three detectors with different crystal size, in order to obtain 7 x 7, 8 x 8 and 9 x 9 arrays over the fixed area of 25.7 x 25.7 mm 2, having the same overall dimensions of a Position Sensitive Photomultiplier Tube. Detector sensitivity, energy resolution and spatial resolution have been measured, and the acquired image quality has been evaluated with particular attention to pixel identification capability. (c) 2005 Elsevier B.V. All rights reserved