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Table 1 High-contrast resolution results for 50% and 10% MTF, obtained with Catphan QA and CTQA_cp

From: A simple method for low-contrast detectability, image quality and dose optimisation with CT iterative reconstruction algorithms and model observers

MTF results Catphan QA CTQA_cp
CT acquisition parameter MTF (ll/cm) 50% MTF (ll/cm) 10% MTF (ll/cm) 50% MTF (ll/cm) 10%
300 mAs FBP 3.7 6.4 3.0 6.1
280 mAs FBP 3.7 6.3 3.0 6.5
260 mAs FBP 3.7 6.4 3.5 6.1
240 mAs FBP 3.7 6.3 3.0 6.1
220 mAs FBP 3.8 6.5 3.5 6.5
200 mAs FBP 3.9 6.6 3.1 6.5
180 mAs IDOSE 1 3.8 6.5 2.8 6.0
180 mAs IDOSE 2 3.7 6.5 3.1 6.0
180 mAs IDOSE 3 3.8 6.5 3.5 6.5
180 mAs IDOSE 4 3.9 6.6 3.4 6.0
170 mAs IDOSE 4 3.8 6.5 3.0 6.0
170 mAs IDOSE 5 3.8 6.5 3.0 6.1
170 mAs IDOSE 6 3.9 6.7 3.0 6.1
160 mAs IDOSE 6 3.7 6.5 2.9 5.6
160 mAs IMR1 4.2 7.1 3.6 6.5
150 mAs IMR1 4.1 7.1 3.6 6.6
140 mAs IMR1 4.1 6.9 3.5 6.5
140 mAs IMR2 4.0 6.8 3.7 6.4
130 mAs IMR2 4.2 7.1 3.8 6.5
130 mAs IMR3 4.0 6.8 3.5 6.3
120 mAs IMR3 3.9 6.7 3.5 6.0
110 mAs IMR3 4.1 7.0 3.9 6.5
100 mAs IMR3 3.9 6.7 3.5 6.1
90 mAs IMR3 3.9 6.7 3.6 6.1
80 mAs IMR3 4.0 6.8 3.6 6.4
70 mAs IMR3 3.6 6.2 3.5 6.0
60 mAs IMR3 3.8 6.5 3.5 5.9
50 mAs IMR3 3.4 6.0 3.6 5.7
40 mAs IMR3 3.4 6.0 3.2 5.6
30 mAs IMR3 NE NE 4.4 6.9
25 mAs IMR3 NE NE 3.5 6.0
20 mAs IMR3 NE NE 3.7 7.0
15 mAs IMR3 NE NE 4.0 7.0
  1. NE not evaluated by the software