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Table 4 SORa and SORw for the image quality phantom

From: dAcquisition setting optimization and quantitative imaging for 124I studies with the Inveon microPET-CT system

Isotope Correction SORa (%) SORw (%)
   2DFBP 2DOSEM 3DOSEM/MAP 2DFBP 2DOSEM 3DOSEM/MAP
18F No correction 15.9 15.8 19.9 -0.8 4.4 0.1
  AC 2.6 5.8 1.2 2.4 5.6 3.3
  AC-SC 1.4 4.9 3.0 0.2 4.2 2.8
124I No correction 17.3 18.1 17.9 4.8 9.7 3.6
  AC 3.2 7.0 < 0.01 8.5 12.5 8.9
  AC-SC -0.9 4.5 < 0.01 3.7 7.4 3.6
  AC-SC-GC -6.6 2.2 < 0.01 -4.4 2.9 0.9
  1. SORa, spillover ratio for the air region; SORw, spillover ratio for the water region; 2DFBP, 2D filtered back-projection; 2DOSEM, 2D ordered-subset expectation maximization; 3DOSEM/MAP, 3DOSEM in combination with maximum a posteriori; AC, attenuation correction; SC, scatter correction; GC, gamma-coincidence correction.