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: Contribution to journalConference articlepeer-review

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 (>103), 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)
Pages (from-to)104-111
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 1st SPIE Conference on the Medical Applications of Penetrating Radiation - Denver, CO, USA
Duration: Jul 22 1999Jul 23 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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