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| Measurement | Low-dose protocols | Conventional protocols | p-value |
|---|---|---|---|
| Average contrast volume (mL) | 51.6 ± 14.1 | 92.3 ± 23.6 | 0.001 |
| Average tube voltage (kV) | 82 ± 13.0 | 108 ± 10.9 | 0.018 |
