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Proceedings Paper

An Experimental Computed Tomographic (CT) Scanner
Author(s): M. Yaffe; H. E. Johns
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Paper Abstract

An experimental rotating fan-beam (3rd generation) CT scanner has been designed and constructed at The Ontario Cancer Institute. The scanner incorporates an array of 201 xenon ionization detectors. These operate at a moderate pressure of 5 atm. with a collecting potential of 1 kV. A digitizing charge integration circuit is coupled to the collecting electrode of each detector so that detector data.can be digitally multiplexed onto a computer bus. The scanner is capable of acquiring scan data in 10 seconds per tomographic slice. The experimental nature of this scanner allows flexibility of x-ray technique, data accumulation, reconstruction algorithms, and image manipulation. The design of the detector and associated electronics is described and the method of scanner calibration is outlined with emphasis on some of the problems associated with fan-beam scanners.

Paper Details

Date Published: 6 July 1979
PDF: 9 pages
Proc. SPIE 0173, Application of Optical Instrumentation in Medicine VII, (6 July 1979); doi: 10.1117/12.957160
Show Author Affiliations
M. Yaffe, University of Toronto (Canada)
H. E. Johns, University of Toronto (Canada)

Published in SPIE Proceedings Vol. 0173:
Application of Optical Instrumentation in Medicine VII
Joel E. Gray, Editor(s)

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