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Spill-over ratio for various reconstruction algorithms, such as FBP, FBP-3DRP, OSEM2D, and OSEM3D-MAP reconstruction with filters. All data were presented for partially corrected data, AC corrected, and AC and SC corrected. Spill-over ratio for (a) air and (b) water. The term “partially corrected” meant that normalization, dead-time, and random correction were performed. 3DRP: FBP-3DRP, MAP: OSEM3D-MAP.
