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A direct reconstruction method with variable constraints

✍ Scribed by Li Liu; Yuan-mei Wang

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
219 KB
Volume
10
Category
Article
ISSN
0899-9457

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✦ Synopsis

In this article, a direct method to reconstruct images from projections is presented. This method, having its origin in astrophysics to restore images from observed data, uses a constant upper bound and a variable lower bound to constrain the maximum and minimum values taken by the emission intensity during iteration. Computer-simulated emission projection data from two phantoms are used for reconstruction. Comparison is made with other methods. The results show that a much better spatial resolution can be acquired by this method, especially for the sharp-shaped emission sources.

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