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Table 2 Comparison of RCs (%) of all spheres among three different correction combinations

From: Impacts of acquisition and reconstruction parameters on the absolute technetium quantification of the cadmium–zinc–telluride-based SPECT/CT system: a phantom study

  Correction combination 37 mm 28 mm 22 mm 17 mm 13 mm 10 mm P value
32:1 AC + SC + RR 106.70 94.94 73.44 71.06 74.39 67.80  
  AC + RR 120.23 107.38 82.77 78.93 80.52 75.68  < 0.001a
  AC + SC 67.96 53.86 41.65 34.67 29.91 31.02  < 0.001b
16:1 AC + SC + RR 106.57 97.53 75.37 76.64 63.44 75.91  
  AC + RR 122.00 109.81 84.78 87.25 72.80 81.33  < 0.001a
  AC + SC 71.98 59.22 43.23 41.91 30.89 32.54  < 0.001b
8:1 AC + SC + RR 103.58 96.65 73.31 70.98 73.14 54.67  
  AC + RR 120.84 112.18 88.17 84.09 81.65 62.93  < 0.001a
  AC + SC 71.91 60.81 45.30 41.41 38.88 28.21  < 0.001b
4:1 AC + SC + RR 102.89 96.64 75.93 74.79 53.82 67.59  
  AC + RR 123.41 115.88 92.70 88.94 66.64 75.21  < 0.001a
  AC + SC 73.86 62.46 51.10 44.19 34.34 39.69  < 0.001b
  1. Reconstruction parameters: 35 iterations, 20 subsets, no filter; Acquisition parameters: 120 s/frame of acquisition time, 15% main energy window; AC, attenuation correction; SC, scatter correction; RR, resolution recovery correction; a, AC + SC + RR vs. AC + RR; b, AC + SC + RR vs. AC + SC