Table 3.
Timing and image quality summary statistics
| Variable | Configuration | Mean | SD | p valuea | post hoc comparisonsb |
|---|---|---|---|---|---|
| Reading time, s | |||||
| Commercial IR | 286.7 | 135.1 | 0.89 | N/A | |
| ANLM | 292.4 | 116.6 | |||
| FBP | 282.3 | 141 | |||
| Quality rating (1 = non-diagnostic, … 5 = routine diagnostic) | |||||
| Commercial IR | 4.2 | 0.4 | <0.0001 | All pairs | |
| ANLM | 4.3 | 0.4 | |||
| FBP | 3.7 | 0.5 | |||
| Sharpness (1 = very sharp, … 5 = non-diagnostic) | |||||
| Commercial IR | 2.0 | 0.3 | <0.0004 | b < a, c | |
| ANLM | 1.8 | 0.3 | |||
| FBP | 2.0 | 0.3 | |||
| Noise (1 = less than usual, … 4 = increased noise affecting interpretation) | |||||
| Commercial IR | 2.5 | 0.3 | <0.0001 | All pairs | |
| ANLM | 2.4 | 0.3 | |||
| FBP | 2.8 | 0.3 | |||
| Texture (0 = no noticeable change, … 3 = blotchiness or change affecting confidence) | |||||
| Commercial IR | 1.6 | 0.4 | 0.06 | N/A | |
| ANLM | 1.5 | 0.4 | |||
| FBP | 1.4 | 0.4 | |||
Complete scales to assess image quality are available in “Appendix”
a
p value is for a 2° of freedom test for any difference in mean values among configuration after adjustment for clustering (blocking) on case
b
Post hoc comparisons are presented without adjustment for multiple testing and are indicated as group “a” for Commercial IR, “b” for ANLM, “c” for FBP