P values of Student t test between two different imaging techniques
| Measurement | Transclavicular Distance | Scan Length | DLP | CTDI |
|---|---|---|---|---|
| Fixed mA vs NI 11.4 | 0.46 | 0.43 | <0.008 × 10−7 | <0.008 × 10−6 |
| NI 11.4 vs NI 20.2 | 0.92 | 0.89 | <0.01 × 10−3 | <0.0001 |
| Fixed mA vs NI 20.2 | 0.43 | 0.42 | <0.007 × 10−11 | <0.004 × 10−12 |
Note:—NI indicates noise index; DLP, dose-length product; CTDI, CT dose index; mA, tube current-time product.