Performance test of a LSO-APD PET module in a 9.4 Tesla magnet

Author

Pichler, B. ; Lorenz, E. ; Mirzoyan, R. ; Pimpl, W. ; Roder, F. ; Schwaiger, M. ; Ziegler, S.I.

Author_Institution

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

Volume

2

fYear

1997

fDate

9-15 Nov 1997

Firstpage

1237

Abstract

One of the future goals is to install a PET detector in a magnetic field for a combined PET/MRT device. Thus, in this study the influence of a 9.4 Tesla magnetic field on a small scintillation detector with avalanche photodiode (APD) readout was tested. The detector, comprising a 3.7×3.7×12.0 mm³ lutetium oxyorthosilicate (LSO) crystal coupled to the 3 mm Ø active surface of an APD was exposed to 511 keV gamma rays from a ²²Na source. The energy resolution at room temperature was 14.4% (FWHM). Measurements of gain and energy resolution were performed outside and in the center of a homogeneous magnetic field of 9.4 Tesla. Both, the gain and energy resolution were unaffected by the magnetic field being either parallel or orthogonal to the electrical field of the APD. These results prove the potential of using APDs in a combined PET/MRT imaging system

Keywords

avalanche photodiodes; biomedical electronics; biomedical equipment; gamma-ray detection; positron emission tomography; solid scintillation detectors; 511 keV; 9.4 T; 9.4 Tesla magnetic field influence; ²²Na source; LSO-APD PET module; Na; combined PET/MRT device; electrical field; energy resolution; gain; homogeneous magnetic field; medical diagnostic imaging; medical instrumentation; nuclear medicine; performance test; Avalanche photodiodes; Energy resolution; Gamma ray detection; Gamma ray detectors; Magnetic field measurement; Magnetic fields; Positron emission tomography; Scintillation counters; Solid scintillation detectors; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1997. IEEE

Conference_Location

Albuquerque, NM

ISSN

1082-3654

Print_ISBN

0-7803-4258-5

Type

conf

DOI

10.1109/NSSMIC.1997.670533

Filename

670533