Performance Comparison of Smoothing and Gamma Priors for Transmission Tomography
نویسندگان
چکیده
We introduced [1] a Bayesian method for transmission tomography that used a novel pointwise prior in the form of a mixture of gamma distributions. Here, we compare the performance our pointwise prior with that of a smoothing prior in the context of a weak tumor detection task for emission PET. The reprojected attenuation maps from each method are used for attenuation correction of 2D PET emission data. Our focus is on the problem of low counts in the transmission scan.
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تاریخ انتشار 1999