Group | Scanning scheme/parameters |
---|---|
Scanned area | Diaphragmatic apex to lower margin of the symphysis pubis |
Body position | Supine position |
Tube voltage | A ball tube 90 kV/B ball tube SN 150 kV |
Tube current | A ball tube 144 mAs/ B ball tube 90 mAs |
Linear fusion coefficient | 0.5 |
Pitch | 1.0 |
Rotate speed | 0.5 s |
Collimation | 2×192×0.6 mm |
Slice thickness | 1 mm |
Scanning interval | 1 mm |
Monitoring technique | Phase III enhancement (automatic tracking technology: when the aorta monitoring threshold reaches 100 HU, the scanning of the artery phase is triggered, the venous phase scanning is performed after 40 s, and the delayed phase scanning is performed 80 s after the completion of the venous phase scanning) |
Contrast agent | Iopromide |
Contrast injection concentration | 370 mgI/ml |
Contrast injection dose | 1.5 ml/kg |
Contrast injection rate | 3.5 ml/s |
Subsequent normal saline | 20~30 ml |