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Experimental evaluation of a modular scintillation camera for SPECT

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4 Author(s)
Rogers, W.L. ; Div. of Nucl. Med., Michigan Univ. Med. Sch., Ann Arbor, MI, USA ; Clinthorne, N.H. ; Shao, L. ; Koral, K.F.

A modular scintillation camera has been constructed for use in a ring-type single photon tomograph for nuclear medicine. Its performance has been characterized, and experiments with coupling the x and y maximum-likelihood position estimators and varying the sampling of the scintillation light are described. Average spectral resolution in the x direction is equivalent to a 3.6-mm FWHM (full width at half-maximum) Gaussian. In the y direction the response function averages 3.6 mm FWHM. RMS (root mean square) linearity is 0.9 mm in x and 1.1 mm in y. Potential for improving resolution by increasing the sampling density in x has been demonstrated, but a two-dimensional position estimator would be required to maintain acceptable linearity. It is concluded that with the exception of reduced resolution within 6-9 mm of the edge, the camera performance is within design specifications

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Nuclear Science, IEEE Transactions on  (Volume:36 ,  Issue: 1 )