A 32-channel LSO matrix coupled to a monolithic 4×8 APD array for high resolution PET

Author

Pichler, B.J. ; Boening, G. ; Rafecas, M. ; Pimpl, W. ; Schwaiger, M. ; Ziegler, S.I.

Author_Institution

Nuklearmed. Klinik und Poliklinik, Tech. Univ. Munchen, Germany

Volume

2

fYear

2000

fDate

6/22/1905 12:00:00 AM

Abstract

Summary form only given as follows: Avalanche Photodiodes (APD) offer new design options for high resolution PET detectors. New, monolithic arrays of 4×8 densely packed APDs (each with a 1.6 mm×1.6 mm sensitive area) were developed and evaluated for their suitability to read out 32 small (2 mm×2 mm×6 mm) LSO crystals. The gain of the APDs was about 10, its variation within an array was less than 9%. The average dark current was 8 nA per diode pixel, the detector capacitance was 10...12 pF. Energy resolution was 16.6% for gamma rays with 511 keV. In the matrix of 32 crystals coupled to the APD array, light crosstalk was only 8%. The monolithic APD arrays proved to be stable and may, in combination with LSO crystals, facilitate the design of various detector geometries, such as panels or multi-layer modules

Keywords

arrays; avalanche photodiodes; biomedical electronics; gamma-ray detection; image resolution; positron emission tomography; 10 to 12 pF; 32-channel LSO matrix; 511 keV; 8 nA; dark current; detector geometries design; energy resolution; high resolution PET; medical diagnostic imaging; medical instrumentation; monolithic 4×8 APD array; monolithic APD arrays; multilayer modules; nuclear medicine; panels; Avalanche photodiodes; Capacitance; Crystals; Dark current; Detectors; Diodes; Energy resolution; Gamma rays; Optical coupling; Positron emission tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2000 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-6503-8

Type

conf

DOI

10.1109/NSSMIC.2000.950015

Filename

950015