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Protocol of 3D-CT
| slice thickness (mm) | 1.0 |
| slice interval (mm) | 1.0 |
| rotation time (sec) | 0.5 |
| helical pitch | 1.438 |
| voltage (kV) | 120 |
| beam width (mm) | 16 |
| CTDIvol (mGy) mean (range) | 3.5 (1.9–4.9) |
| DLP (mGy.cm) mean (range) | 133.6 (58.1–175.8) |
CTDIvol CT dose index volume, DLP dose length product
