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Proceedings Paper

Improvement of the OPED algorithm by means of introducing an integration into the evaluation process
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Paper Abstract

The tomographic method based on the orthogonal polynomial expansion on disc (OPED) was presented at SPIE conference of Medical Imaging 2006. We could show already some advantages compared to FBP as it is commonly used in today's CT systems. However, OPED did show for some specific cases some noise in the reconstructed images and even artefacts, mainly an aliasing. We have found that the OPED algorithm can be essentially improved by integrating the polynomial over the whole area belonging to the pixel instead of assigning to the whole pixel the polynomial value calculated just for one point of this pixel (typically bottom left). This advantageous implementation is effective in view of reduction of the aliasing artefacts and noise without affecting the resolution. This can be fulfilled effectively for OPED due to its simple structure.

Paper Details

Date Published: 16 March 2007
PDF: 9 pages
Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65105I (16 March 2007); doi: 10.1117/12.711421
Show Author Affiliations
Oleg Tischenko, GSF National Research Ctr. for Environment and Health (Germany)
Yuan Xu, Univ. of Oregon (United States)
Christoph Hoeschen, GSF National Research Ctr. for Environment and Health (Germany)

Published in SPIE Proceedings Vol. 6510:
Medical Imaging 2007: Physics of Medical Imaging
Jiang Hsieh; Michael J. Flynn, Editor(s)

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