Development of a small-field-of-view scintimammography camera: measurements and simulations

We report on studies of a small field of view scintimammography camera based on a position sensitive PMT and a crystal scintillator array. A 5 inch R3292 Hamamatsu PMT was coupled to a variety of scintillators, including pixelized NaI(Tl), CsI(Na) and YAP. Laboratory and phantom studies were performed to compare performances of the above scintillator sensors with special emphasis on spatial resolution and scatter rejection. The results of Monte Carlo simulations for different pixel sizes are also presented.