Comparison of the beveled-edge and reach-through APD structures for PET applications

Michael J. Paulus, James M. Rochelle, David M. Binkley

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations

Abstract

The electrical characteristics of the beveled-edge and reach-through APD structures are theoretically and experimentally analyzed to determine which is most suitable for incorporation into a Positron Emission Tomography (PET) detector. The beveled edge structure is found to have a lower excess noise factor and lower dark current, leading to a superior signal-to-noise ratio. The reach-through structure is found to have a lower operating voltage and faster speed of response. Because signal-to-noise ratio is fundamentally important to achieving the energy and timing resolutions required for PET detectors, we believe the beveled-edge structure is more appropriate than the reach-through structure for PET applications. This finding is experimentally verified by comparing the performance of several commercially available beveled-edge and reach-through APDs.

Original languageEnglish
Pages1864-1868
Number of pages5
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) - Norfolk, VA, USA
Duration: Oct 30 1994Nov 5 1994

Conference

ConferenceProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4)
CityNorfolk, VA, USA
Period10/30/9411/5/94

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