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Proceedings Paper

A Comparison Of The Number Of Rays Vs The Number Of Views In Reconstruction Tomography
Author(s): R. A. Schulz; E. C. Olson; K. S. Han
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Paper Abstract

In the field of x-ray reconstruction tomography, many sets of attenuation data are gathered at various angular orientations to the object. Each set of data is divided into many individual elements where each element represents a single pencil beam measurement of attenuated x-rays at some perpendicular distance from the origin. Given this scheme of data collection, it is reasonable to ask the following question: For a given reconstruction diameter, is it more important to collect more sets of projection data - views, or more elements per projection - rays? The answer to this question is basic to the design of computer assisted tomographic (CAT) scanners. Using simulated projection data, we show that for the case of Rotate/Translate geometry, the reconstructed picture is much more sensitive to rays than to views. That is, given the design choice between increasing the number of views or increasing the number of rays per view, one would clearly prefer to sample rays more frequently. This concept may be generalized to any geometry CAT scanner being particularly relevant in the design of pure rotational fan beam CAT scanners.

Paper Details

Date Published: 27 December 1977
PDF: 8 pages
Proc. SPIE 0127, Application of Optical Instrumentation in Medicine VI, (27 December 1977); doi: 10.1117/12.955955
Show Author Affiliations
R. A. Schulz, EMI Medical Inc. (United States)
E. C. Olson, EMI Medical Inc. (United States)
K. S. Han, EMI Medical Inc. (United States)

Published in SPIE Proceedings Vol. 0127:
Application of Optical Instrumentation in Medicine VI
Joel E. Gray; William R. Hendee, Editor(s)

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