Imaging Tests
The range of imaging tests that can be performed are shown in Table 1.
| Test | Reason |
| Abdominal x-ray | This is of limited value, often shows non-specific findings and only useful if obstruction clinically suspected. However, appearances can be normal even in obstruction. No role in standard assessment of patients with RUQ/RIF pain. |
| Chest x-ray (Erect) | May show free gas under the diaphragm if perforated viscus (sensitivity around 80% so cannot rule out). Useful to exclude certain medical causes if suspected |
| Ultrasound (USS) | Useful to assess RUQ and RIF pain (eg. gallstones, appendicitis) |
| Computed tomography (CT) | Investigation of choice, although not always readily available, is costly and exposes patient to radiation |
| 12-lead ECG | General workup, particularly in the elderly, or to rule out medical causes |