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Proceedings Paper

Efficient computation of projections in iterative SPECT reconstruction
Author(s): James J Hamill; Ronald E. Malmin
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Paper Abstract

In calculating projections for iterative SPECT, a particularly time consuming part of the calculation is convolution of the activity at each depth by the point-spread function, using FFTs. We find that space-based convolutions with a short-range kernel are equivalent and faster, if one uses the central limit theorem to generate a gaussian, depth-dependent point- spread function. This technique is applied to forward and backward projections.

Paper Details

Date Published: 18 August 1995
PDF: 4 pages
Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); doi: 10.1117/12.216879
Show Author Affiliations
James J Hamill, Siemens Medical Systems (United States)
Ronald E. Malmin, Siemens Medical Systems (United States)


Published in SPIE Proceedings Vol. 2622:
Optical Engineering Midwest '95
Rudolph P. Guzik, Editor(s)

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