Bin Mode Estimation Methods for Compton Camera Imaging
arXiv:1312.4291 · doi:10.1016/j.nima.2014.05.081
Abstract
We study the image reconstruction problem of a Compton camera which consists of semiconductor detectors. The image reconstruction is formulated as a statistical estimation problem. We employ a bin-mode estimation (BME) and extend an existing framework to a Compton camera with multiple scatterers and absorbers. Two estimation algorithms are proposed: an accelerated EM algorithm for the maximum likelihood estimation (MLE) and a modified EM algorithm for the maximum a posteriori (MAP) estimation. Numerical simulations demonstrate the potential of the proposed methods.
18 pages, 8 figures, submitted for publication in Nuclear Inst. and Methods in Physics Research, A
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