Title :
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
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;
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
0-7803-4258-5
DOI :
10.1109/NSSMIC.1997.670533
