DocumentCode
897845
Title
Design Consideration for a Continuously Rotating Positron Computed Tomograph
Author
Takami, K. ; Ishimatsu, K. ; Hayashi, T. ; Ueda, K. ; Kawaguchi, F. ; Okajima, K. ; Ohgushi, A. ; Inoue, S. ; Takakusa, Y. ; Nakase, S. ; Tanaka, Eiki
Author_Institution
Hitachi Central Research Laboratory, Kokubunji, Tokyo
Volume
29
Issue
1
fYear
1982
Firstpage
534
Lastpage
538
Abstract
Design consideration for a whole-body, multislice Positron CT having 3 detector rings, 160 BGO crystal/ring, and a continuously rotating scan is described. The one detector ring has 40 "BGO Quad-detectors", each of which consists of 4 BGO crystals and two photomultipliers. Improvements in the BGO crystal and the photomultiplier have been accomplished. Geometrical configuration of the collimator was determined through optimization of the main performances of both the inplane and cross-plane images, utilizing the formulae for a cylindrical phantom with uniform activity. A continuously rotating scan (0.5-1rps) with unequally spaced the Quad-detector units is used. Along with this scan, a 32-channel rotary photo-coupler was developed for contact-free data transmission.
Keywords
Cathodes; Crystallization; Crystals; Detectors; Energy resolution; Photomultipliers; Positrons; Rough surfaces; Spatial resolution; TV;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1982.4335902
Filename
4335902
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