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NATURE OF RINGING ARTIFACTS IN SPECT RECONSTRUCTION AND THEIR REDUCTION BY THE USE OF SIDE INFORMATION
2007
2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro
ML-EM iterative reconstruction algorithms tend towards ringing artifacts, and high noise, after a large number of iterations just as filtered backprojection algorithms tend toward streak artifacts. OS-EM is a type of ML-EM algorithm and an edge overshoot has been observed experimentally for uniform-activity spheres of large size but not smaller size. Herein, we shed light on such artifacts by showing that they are a function of the object size relative to the FWHM of the collimator-detector
doi:10.1109/isbi.2007.356818
dblp:conf/isbi/LiK07
fatcat:u7hcf24w4fbc3erf2uu7443ldy