Planar APD arrays for high resolution PET

Kanai S. Shah, Richard Farrell, Leonard Cirignano, Ronald Grazioso, Paul Bennett, Simon R Cherry, Yiping Shao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


In this paper, characterization of new, planar silicon avalanche photodiode arrays for high-resolution PET applications is discussed. High gain, monolithic 4 × 4 element APD arrays (2 mm pixels) have been fabricated using planar processes. These devices were characterized by measuring their gain (>10 3), quantum efficiency (60% at LSO emission) and noise (200 eV FWHM). Energy and timing resolution of these APDs were also measured by coupling them to LSO scintillators (2×2×10 mm) and were found to be 12% and 4 ns, respectively. An APD array was also coupled to a matching LSO array and successful experiments were conducted to identify the crystal which scintillated. Finally, initial experiments to measure depth of interaction have also been performed.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages8
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 1st SPIE Conference on the Medical Applications of Penetrating Radiation - Denver, CO, USA
Duration: Jul 22 1999Jul 23 1999


OtherProceedings of the 1999 1st SPIE Conference on the Medical Applications of Penetrating Radiation
CityDenver, CO, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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