Acute appendicitis
| Patient | First imaging | Problem solving |
|---|---|---|
| Child | graded‑compression US (IOC) | MRI (or low‑dose CT) if equivocal |
| Pregnant | US | MRI without gadolinium |
| Adult (non‑pregnant) | CECT (IOC) (low‑dose) | — |
| Young thin adult / woman | US first is reasonable | CT if equivocal |