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Table 5 Comparison of RCs (%) between the 15% energy window and 20% energy window

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

  Energy window (%) 37 mm 28 mm 22 mm 17 mm 13 mm 10 mm P value
32:1 15 106.70 94.94 73.44 71.06 74.39 67.80 0.023
  20 105.50 94.23 72.93 70.83 72.89 65.26  
16:1 15 106.57 97.53 75.37 76.64 63.44 75.91 0.314
  20 104.94 96.93 75.36 77.38 63.79 74.35  
8:1 15 103.58 96.65 73.31 70.98 73.14 54.67 0.919
  20 102.46 96.73 74.10 74.64 72.02 51.80  
4:1 15 102.89 96.64 75.93 74.79 53.82 67.59 0.933
  20 104.26 96.31 79.16 77.13 57.10 58.69  
  1. Reconstruction parameters: 35 iterations, 20 subsets, No filter; AC + SC + RR correction. Acquisition parameters: 120 s/frame of acquisition time