Answers are grounded in this paper and cite their sources.
A fast approach to including attenuation in iterative maximum-likelihood and least-squares algorithms for single-photon-emission computed tomography (SPECT) is presented. Ray-tracing and summing of attenuation coefficients are replaced by the use of two lookup tables, one to compute attenuated ray path integrals based on a set of polar grid points and one to perform polar-to-rectangular transformations. The resulting algorithm implements a spatial average which is comparable in accuracy to ray-tracing with rectangular pixels, yet requires less than one sixteenth the CPU time.>
No takes yet. Share an insight, caveat, or question.
Hebert et al. (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: