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Table 3 Geometrical density as in Table 2 for Nd=32 and NE=4

From: Algorithms for joint activity–attenuation estimation from positron emission tomography scatter

N j 2×2 4×4 8×8 9×9 16×16
\(\underline {\boldsymbol {K}}\) 1.31 2.41 2.79 2.78 1.85
A λ 2.25 7.76 17.4 18.9 23.0