Summary of quality scores for images produced with CTA and DSCTA
| Test | Operator 1 (n = 30) | Operator 2 (n = 30) | ||||
|---|---|---|---|---|---|---|
| Mean | Median | SD | Mean | Median | SD | |
| CTA | 2.50 | 3 | 0.86 | 2.67 | 3 | 0.80 |
| Hard-copy check by operator 3 | 3.07 | 3 | 1.17 | 2.83 | 3 | 1.09 |
| DSCTA | 3.37 | 3 | 0.81 | 3.30 | 3 | 0.95 |
| Hard copy check by operator 3 | 3.97 | 4 | 0.85 | 3.83 | 4 | 0.95 |
| DSCTA minus CTA* | 0.87 | 1 | 0.73 | 0.63 | 1 | 0.56 |
| Hard-copy check by Observer 3† | 0.90 | 1 | 1.03 | 1.00 | 1 | 1.11 |
* 95% CIs were 0.59, 1.14 for operator 1 and 0.43, 0.84 for operator 2. P values with the t test were <.001 for both operators.
† 95% CIs were 0.52, 1.25 for operator 1 and 0.58, 1.42 for operator 2. P values with the t test were <.001 for both operators.