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Evaluation of a EMCCD Detector for Emission-Transmission Computed Tomography

2006; Institute of Electrical and Electronics Engineers; Volume: 53; Issue: 5 Linguagem: Inglês

10.1109/tns.2006.882798

1558-1578

Boon‐Keng Teo, I. Shestakova, Mingshan Sun, William C. Barber, V.V. Nagarkar, B.H. Hasegawa,

Radiation Detection and Scintillator Technologies

A prototype electron multiplying charged coupled device (EMCCD) based gamma camera is evaluated for emission-transmission computed tomography. The detector has an 8.2times8.2 mm 2 active sensor area with a 512times512 pixel array, and can be operated with a 3:1 fiber optic taper to expand the effective imaging area to approximately 25times25 mm 2 for small animal studies. We demonstrate the possibility of operating the camera in either charge integrating or single photon counting mode for pinhole SPECT with 125 I and 99m Tc sources. In photon counting mode, we show that energy discrimination can be used to distinguish between these two sources for dual isotope imaging. X-ray CT images of phantoms are taken without a collimator to evaluate the quality of the camera for transmission imaging