Semiconductor pixel detectors for gamma-ray imaging in nuclear medicine

H. B. Barber, B. A. Apotovskyc, F. L. Augustine, H. H. Barrett, E. L. Dereniak, F. P. Doty, J. D. Eskin, W. J. Hamilton, D. G. Marks, K. J. Matherson, J. E. Venzon, J. M. Woolfenden, E. T. Young

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)421-428
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number3
StatePublished - Aug 21 1997

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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