Author/Authors :
Cirignano، نويسنده , , L and Shah، نويسنده , , K.S and Bennett، نويسنده , , P.R and Klugerman، نويسنده , , M and Dmitryev، نويسنده , , Y and Squillante، نويسنده , , M.R and Narita، نويسنده , , T and Bloser، نويسنده , , P and Grindlay، نويسنده , , J and Hasegawa، نويسنده , , B.H and Iwata، نويسنده , , K، نويسنده ,
Abstract :
A small pixellated CdZnTe array is tested for suitability in a prototype SPECT system designed to acquire both emission and transmission data. Determining the optimum contact design and obtaining performance estimates of single photon acquisition are the primary focus. Flood field and collimated 57Co sources irradiated the 16 pixel array (5 mm thick and 1.5 mm pixels) to determine photopeak efficiencies and detector response with different event collection techniques. Intrinsic full energy peak efficiency averaged 72% for an 18 keV acceptance window. A small irradiation spot scanned an array region, revealing detector response from nearby pixels. Post processing spectra compare coincident and anti-coincident acquisition. Additionally, current mode tests compare linearity with a CdWO4/Si p-i-n detector.
