Table 5.
Comparison of image quality scores and processing times between the CADstream and the DynaCAD for breast systems
| Score categories | Number of observations | Mean | Std | Min | Max | p value |
|---|---|---|---|---|---|---|
| Maximum intensity projection score | ||||||
| CS | 163 | 3.05 | 0.58 | 1 | 4 | 0.58 |
| DC | 172 | 2.97 | 0.94 | 0 | 4 | |
| Reformat score | ||||||
| CS | 163 | 2.38 | 1.08 | 0 | 4 | 0.05 |
| DC | 171 | 2.26 | 1.16 | 0 | 4 | |
| Motion correction score | ||||||
| CS | 163 | 2.26 | 1.26 | 0 | 4 | <0.0001 |
| DC | 172 | 1.29 | 1.19 | 0 | 3 | |
| Color parametric map score | ||||||
| CS | 163 | 3.14 | 0.55 | 1 | 4 | 0.24 |
| DC | 172 | 3.08 | 0.5 | 0 | 4 | |
| Time–intensity curve score | ||||||
| CS | 163 | 3.09 | 0.51 | 0 | 4 | 0.59 |
| DC | 172 | 3.06 | 0.47 | 0 | 4 | |
| Volume rendering score | ||||||
| CS | 163 | 2.94 | 1.32 | 0 | 5 | <0.0001 |
| DC | 172 | 1.28 | 1.54 | 0 | 5 | |
| Overall score | ||||||
| CS | 165 | 3.16 | 0.74 | 1 | 5 | 0.08 |
| DC | 172 | 3.04 | 0.31 | 2 | 4 | |
| Reader interpretation time | ||||||
| CS | 163 | 12.69 | 4.55 | 5 | 45 | 0.11 |
| DC | 172 | 11.98 | 2.98 | 6 | 20 | |
Std standard deviation, Min minimum, Max maximum, CS CADstream, DC DynaCAD for Breast
The maximum number of observations is 177. p values are based on signed-rank test. Using the Bonferroni correction for multiple comparisons (six comparisons for image quality), the threshold for significance at a 5 % level is 0.05/9 = 0.006