Title :
A time-of-flight multi-probe system for positron imaging
Author :
Satoh, Nakahiro ; Shimizu, Keiji ; Uchida, Hiroshi ; Yamashita, Takaji ; Tanaka, Eiichi
Author_Institution :
Central Res. Lab., Hamamatsu Photonics KK, Japan
Abstract :
A time-of-flight (TOF) multi-probe system has been developed to measure the distribution of positron-emitting tracers in the body. The system uses 16 (a pair of 8) detector probes, each of which is composed of a truncated pyramid BaF2 crystal and a 26 mm diameter photomultiplier tube (Hamamatsu R5320). The average coincidence time resolution for possible 64 coincidence pairs is 180 ps FWHM, which corresponds to 2.7 cm in space. The system performance such as count rate and imaging capabilities were evaluated using phantoms. The results show that a low-cost positron imaging system can be constructed using the TOF detector probes. The system is designed to increase the number of detector probes up to 32 (a pair of 16) for a better imaging capability
Keywords :
biomedical equipment; photomultipliers; positron emission tomography; probes; 180 ps; 2.7 cm; 26 mm; BaF2; Hamamatsu R5320; coincidence pairs; medical diagnostic imaging; nuclear medicine; photomultiplier tube; positron imaging; positron-emitting tracers distribution; time-of-flight multi-probe system; truncated pyramid BaF2 crystal; Imaging phantoms; Laboratories; Nuclear medicine; Photomultipliers; Photonic crystals; Positron emission tomography; Probes; Radiation detectors; Solid scintillation detectors; Spatial resolution;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.510443
