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Proceedings Paper

A Position Imaging System For The Measurement Of Regional Cerebral Blood Flow
Author(s): C. J. Thompson; Y. L. Yamamoto; E. Meyer
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Paper Abstract

The "Positome" is a 32 detector ring multiple coincidence positron camera. The detectors are in a 40 cm diameter ring giving an active region of 30 cm diameter. ft is at present undergoing a clinical trial to asses its utility in the measurement of regional cerebral olood t1cy4 (rCRF). It has been used on over 130 patients suffering stokes and hrain tumours. ofe use Kr-77 gas (which patients innale) and Ga-b8 injected into the antecubital vein as tracers tor measurement of blood flow, transit time and uptake studies. The data collected by an on line minicomputer are reconstructed by a convolution-bacKprojection method in 30 seconds per frame. The device has an efficiency of 1700 counts/(minute.uCi) for a uniform field, a 1,-vOil of 3-4 cm, a coincidence resolving time of 24 nsec, and a minimum time per frame of 2 sec.

Paper Details

Date Published:
PDF: 6 pages
Proc. SPIE 0096, Application of Optical Instrumentation in Medicine V, ; doi: 10.1117/12.965421
Show Author Affiliations
C. J. Thompson, McGill University (Canada)
Y. L. Yamamoto, McGill University (Canada)
E. Meyer, McGill University (Canada)


Published in SPIE Proceedings Vol. 0096:
Application of Optical Instrumentation in Medicine V
Robert K. Cacak; Paul L. Carson; Gregory Dubuque; Joel E. Gray; William R. Hendee; Raymond P. Rossi; Arthur Haus, Editor(s)

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