Author/Authors :
Barber، نويسنده , , H.B. and Apotovsky، نويسنده , , B.A and Augustine، نويسنده , , F.L and Barrett، نويسنده , , H.H. and Dereniak، نويسنده , , E.L and Doty، نويسنده , , F.P and Eskin، نويسنده , , J.D. and Hamilton، نويسنده , , W.J. and Marks، نويسنده , , D.G. and Matherson، نويسنده , , K.J and Venzon، نويسنده , , J.E and Woolfenden، نويسنده , , J.M. and Young، نويسنده , , E.T.، نويسنده ,
Abstract :
Semiconductor pixel detectors hold great promise for replacing scintillation cameras in nuclear medicine; improvements in spatial resolution, energy resolution and sensitivity should result. The current status of this subject is briefly reviewed. The fabrication of hybrid, 48 × 48 CdZnTe pixel arrays for use in gamma-ray imaging is described. Each detector array is indium-bump bonded to a Hughes 48 × 48 multiplexer chip; the design is similar to that of an infrared focal-plane array. The 48 × 48 CdZnTe array is shown to perform well as a gamma-ray imaging system with 125 μm spatial resolution (at 60 keV), equivalent to the pixel spacing. A correction technique for charge spreading between pixels is demonstrated. The implications of macroscopic crystal defects on array performance are briefly discussed.
