| Intravenous contrast | Renal failure, death | 1 in 150 (renal failure), 1 in 500 (death) | Studied in patients older than 18 years; harms are probably more likely in patients with risk factors (e.g., increasing age, diabetes mellitus, renal insufficiency, congestive heart failure) |
| Severe allergic reaction | 1 in 5,000 | History of asthma or reaction to contrast dye increases risk to 1 in 500 |
| Imaging | False-positive findings | 1 in 4 | Dependent on anatomic region; risk is lower for head/neck, higher for chest/abdomen |
| Radiation | Cancer | 1 in 150 to 1 in 14,68024 | Dependent on age, sex, and anatomic region |
