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Proceedings Paper

Evaluation Of Fan Beam Computerized Tomography Systems
Author(s): Alicia M. Walsh; Ikram E. Abdou
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Paper Abstract

The relationship between processing time and image quality of fan beam computerized tomography (CT) systems was examined using computer simulations. Process-ing time was related to the number of projections and samples per projection, and image quality was measured using discrete normalized mean squared error, discrete normalized mean absolute error, and binary error. First, simula-tions were performed on resolution test patterns, measuring the effect of changing the linear or angular spacing on the image quality. The best trade-off between time and resolution appeared to be at a spacing of 3 pixels for linear resolution, and at an angular frequency corresponding to a 16-sector circle. In addition, computer experiments were performed on "industrial" test patterns, measuring the effect of increasing the number of projections and samples per projection on the image quality. The results showed that the optimum choice of these parameters is on the order of N for an N x N image grid, with slight variations depending on the shape of the test pattern used.

Paper Details

Date Published: 18 January 1988
PDF: 8 pages
Proc. SPIE 0829, Applications of Digital Image Processing X, (18 January 1988); doi: 10.1117/12.942125
Show Author Affiliations
Alicia M. Walsh, University of Delaware (United States)
Ikram E. Abdou, University of Delaware (United States)


Published in SPIE Proceedings Vol. 0829:
Applications of Digital Image Processing X
Andrew G. Tescher, Editor(s)

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