🫃 Abdomen CT Protocols
Comprehensive protocols for abdominal imaging including liver, pancreas, kidneys, and bowel.
Quick Reference
| Clinical Scenario | Key Protocol Features | Oral Contrast |
|---|---|---|
| Acute abdominal pain | Portal venous phase, 70s delay | Optional |
| Liver lesion | Triphasic (arterial + portal + delayed) | No |
| Pancreatic mass | Pancreatic phase, 40-50s delay | Water only |
| Renal stones | Non-contrast, thin slices | No |
| Bowel obstruction | Portal venous phase | No |
General Considerations
Patient Preparation
- NPO: 4 hours for solid food
- Oral contrast: Timing varies by indication
- Hydration: Encourage fluids post-contrast
Contrast Dosing
\( \text{Volume (mL)} = \text{Weight (kg)} \times 1.5 \text{ mL/kg} \) - Maximum: 150 mL - Flow rate: 3-4 mL/s - Portal venous timing: 70 seconds
Safety Considerations
Pre-scan Checklist
- eGFR ≥30 mL/min for contrast
- Pregnancy test if applicable
- Metformin hold if eGFR <30
- Contrast allergy history