Summary of transclavicular distance, scan length, dose-length product (DLP), and CT dose index (CTDI)
| Measurement | Transclavicular Distance (cm) | Scan Length (cm) | DLP (mGy-cm) | CTDI (mGy) |
|---|---|---|---|---|
| Fixed mA | 20.1 ± 1.3 | 30.1 ± 2.5 | 1179 ± 109 | 34.7 ± 2.2 |
| NI 11.4 | 20.1 ± 1.5 | 30.1 ± 2.7 | 925 ± 116 | 27.8 ± 3.5 |
| NI 20.2 | 19.8 ± 1.5 | 29.4 ± 4.4 | 729 ± 148 | 23.0 ± 3.5 |
Note:—NI indicates noise index; mA, tube current-time product.