An LSO BLOCK detector for PET using an avalanche photodiode array

Author

Casey, M.E. ; Dautet, H. ; Waechte, D. ; Lecomte, R. ; Eriksson, L. ; Schmand, M.

Author_Institution

CTI PET Syst., Knoxville, TN, USA

Volume

2

fYear

1998

fDate

1998

Firstpage

1105

Abstract

A Block detector, consisting of a four by four array of lutetium oxyorthosilicate (LSO) scintillator crystals coupled to a two by two avalanche photodiode (APD) array was built and tested. The detector block was 8.5 by 8.5 by 10 millimeters so that the crystals were on 2.13 millimeter centers. The APD array has an active area of approximately 9 by 9 millimeters divided into four diodes of 4.5 by 4.5 millimeters each. A standard reach-through process was used to fabricate the diodes. Each of the sixteen crystals in the block was easily identified. The average FWHM of the peaks in ratio space was 4% of full scale. The average energy resolution was 16.2% for 511 keV gamma rays. A single LSO crystal coupled to an APD and put in time coincidence with a plastic detector produced a time coincidence of 1.9 nanoseconds FWHM

Keywords

avalanche photodiodes; cerium; gamma-ray detection; lutetium compounds; positron emission tomography; solid scintillation detectors; LSO BLOCK detector; LSO scintillator crystals; Lu₂SiO₄:Ce; avalanche photodiode array; energy resolution; gamma rays; lutetium oxyorthosilicate scintillator crystals; plastic detector; reach-through process; Avalanche photodiodes; Crystals; Detectors; Diodes; Energy resolution; Gamma rays; Plastics; Positron emission tomography; Sensor arrays; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE

Conference_Location

Toronto, Ont.

ISSN

1082-3654

Print_ISBN

0-7803-5021-9

Type

conf

DOI

10.1109/NSSMIC.1998.774356

Filename

774356