Title :
Evaluation of a EMCCD Detector for Emission-Transmission Computed Tomography
Author :
Teo, B.K. ; Shestakova, I. ; Sun, M. ; Barber, W.C. ; Nagarkar, V.V. ; Hasegawa, B.H.
Author_Institution :
Phys. Res. Lab., California Univ., San Francisco, CA
Abstract :
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 mm2 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 mm2 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 125I and 99mTc 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
Keywords :
X-ray detection; charge-coupled devices; gamma-ray detection; position sensitive particle detectors; radioactive tracers; single photon emission computed tomography; 262144 pixel; 512 pixel; 8.2 mm; 125I; 99Tcm sources; EMCCD based gamma camera; X-ray CT images; X-ray tomography; charge coupled device; dual isotope imaging; energy discrimination; imaging area; phantoms; photon counting mode; pinhole SPECT; pixel array; prototype electron multiplying charged coupled device; radiotracers; single photon counting mode; single photon emission computed tomography; small animal studies; transmission imaging; Cameras; Charge-coupled image sensors; Computed tomography; Detectors; Electron emission; Optical arrays; Optical imaging; Prototypes; Sensor arrays; Single photon emission computed tomography; Charge coupled device; X-ray tomography; single photon emission computed tomography;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2006.882798
