부산대학교 도서관

The capability, of the scintimammography to diagnose sub-centimeter sized tumors was increased by the employment of a dedicated gamma camera (SPEM). Recently the introduction of small field of view camera, based on pixellated scintillation array and position sensitive photomultiplier (PSPMT), allowed to enhance the geometric spatial resolution and contrast of the images due to reduced collimator-tumor distance. The aim of this paper is to investigate the realistic possibility of T1a tumors detection (/spl sim/5 mm size) by comparing the SNR values obtained by different imagers. To this end, we have utilized a self-designed solid breast phantom with different sized hot spots (tumors).