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Experimental results for DOI resolution. (A and B) DOI histograms (calculated from the measured w variable) for 5 z positions of the electronic tagging setup in center crystals of 4-to-1 coupled detector modules with uniform glass (A) and prismatoid light-guides (B). (C) Comparison of DOI resolution based on light-guide used. Prism-PET detector module achieves 2-fold improvement in DOI resolution over uniform glass light-guide.
