A GSO depth of interaction detector for PET

Journal Article · Mon Jun 01 04:00:00 EDT 1998 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.681982· OSTI ID:649390

Yamamoto, S ^[1]; Ishibashi, H ^[2]

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1. Kobe City Coll. of Technology (Japan)
2. Hitachi Chemical Co., Ltd., Tsukuba, Ibaraki (Japan). Tsukuba Research Lab.

The authors have developed a GSO depth of interaction detector. Three GSO scintillators with different concentration of Ce were chosen and stacked along depth of interaction direction and optically coupled to a photomultiplier tube (PMT) or a position sensitive photomultiplier tube (PSPMT). In the beginning, pulse shape, light output and zero-cross time were measured to select a proper combination of GSO scintillators with different concentration of Ce. Selecting three GSO scintillators with different concentration of Ce, a single stacked GSO/PMT depth of interaction detector was fabricated for estimating the possibility of this method. Using the zero-cross time analysis, three peaks correspond to decay times of the three GSO scintillators were obtained. Finally, a GSO/PSPMT depth of interaction block detector was fabricated and tested. The block detector consists of 7 x 7 matrix of GSO scintillators which have three layers of different concentration of Ce optically coupled to a PSPMT. The pulse shape analysis was used for determination of depth of interaction direction while the Anger logic was used for transaxial and axial directions. Good separation was observed in depth of interaction direction as well as transaxial and axial directions. These results indicate that the GSO block detector may become one solution to develop a positron emission tomograph (PET) with depth of interaction detection capability.

• OSTI ID: 649390
• Report Number(s): CONF-971147--
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 3Pt2 Vol. 45; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
55 BIOLOGY AND MEDICINE
BASIC STUDIES
CERIUM
DESIGN
IMAGE PROCESSING
PERFORMANCE TESTING
POSITRON COMPUTED TOMOGRAPHY
SCINTILLATION COUNTERS