Planar APD arrays for high-resolution PET

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

doi:10.1117/12.368173

6 October 1999 Planar APD arrays for high-resolution PET

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

Proceedings Volume 3770, Medical Applications of Penetrating Radiation; (1999) https://doi.org/10.1117/12.368173
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

In this paper, characterization of new, planar silicon avalanche photodiode arrays for high-resolution PET applications is discussed. High gain, monolithic 4 X 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 X 2 X 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.

Citation Download Citation

Kanai S. Shah, Richard Farrell, Leonard J. Cirignano, Ronald Grazioso, Paul R. Bennett, Simon R. Cherry, and Yiping Shao "Planar APD arrays for high-resolution PET", Proc. SPIE 3770, Medical Applications of Penetrating Radiation, (6 October 1999); https://doi.org/10.1117/12.368173

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