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Speed up of an analytical algorithm for nonuniform attenuation correction by using PC video/graphics card architecture
2004
IEEE Transactions on Nuclear Science
A major task in quantitative SPECT (single photon emission computed tomography) reconstruction is compensation for object-specific attenuation, which is usually nonuniform. Mathematically this task is expressed as the inversion of the attenuated Radon transform. Novikov had derived an explicit inversion formula for the attenuated Radon transform for parallel-beam collimation geometry. In our previous work, we extended his work to variable focusing fan-beam (VFF) collimators. A ray-driven
doi:10.1109/tns.2004.829788
fatcat:bkn7jcufxfhrzkih2nyqz7ji6q