Evaluation of cerium doped lutetium oxyorthosilicate (LSO) scintillation crystal for PET

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/23.256710· OSTI ID:6011870

Daghighian, F; Shenderov, P; Pentlow, K S; Graham, M C; Eshaghian, B ^[1]; Melcher, C L; Schweitzer, J S ^[2]

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1. Memorial Sloan-Kettering Cancer Center, New York, NY (United States). Dept. of Medical Physics
2. Schlumberger-Doll Research, Ridgefield, CT (United States)

A new scintillation crystal, cerium-doped lutetium oxyorthosilicate (LSO) was recently discovered with light intensity 75% of NaI(T1), scintillation decay time of 12 ns (30%) and 42 ns (70%), effective Z of 66, and density of 7.4 g/cc. The fast decay time and scintillation light output of LSO are superior to those of BGO for PET and the stopping power of LSO for 511 keV photons is only slightly lower than BGO. In this study the authors directly compared the detection characteristics relevant to PET applications of small crystals of LSO (2 X 2 X 10 mm) with those of BGO. The energy resolution at 511 keV was 12% FWHM for LSO and 2 to 3 times wider for BGO. The coincidence timing of two opposing crystals, using a position sensitive PMT (Hamamatsu R2486), were 1.4 ns FWHM for LSO and more than 3 times higher for BGO. Using a fast PMT (Hamamatsu R3177) coincidence timing for LSO yielded 0.46 ns FWHM. These crystals are being used to simulate a small scale PET scanner and to investigate its imaging performance.

• OSTI ID: 6011870
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 40:4 part 1; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCURACY
COMPARATIVE EVALUATIONS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
EVALUATION
MEASURING INSTRUMENTS
PERFORMANCE TESTING
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
TESTING
TOMOGRAPHY