| Order, By Group | Initial Choice | After ACR Guideline Information | Change from Initial to ACR | After Radiation (RADS) Information | Change from ACR to RADS | Never Changed* |
|---|---|---|---|---|---|---|
| ACR-RADS Group (n = 57) | ||||||
| Ultrasound | 44 (77.2%) | 37 (64.9%) | −7 | 46 (80.7%) | +9 | 32 (72.7%) |
| CT, without contrast | 4 (7.0%) | 18 (31.6%) | +14 | 7 (12.2%) | −11 | 4 (100%) |
| Radiography | ||||||
| Abdomen and pelvis | 8 (14.0%) | 2 (3.5%) | −6 | 2 (3.5%) | 0 | 2 (25.0%) |
| Voiding cystourethrography | 1 (1.8%) | 0 | −1 | 0 | 0 | 0 |
| Intravenous urography | 0 | 0 | 0 | 1 (1.8%) | +1 | 0 |
| MRI, with or without contrast | 0 | 0 | 0 | 1 (1.8%) | +1 | 0 |
| Arteriography of the kidneys | 0 | 0 | 0 | 0 | 0 | 0 |
| Initial vs. guideline: P = .008 | Guideline vs. radiation: P = .007 | |||||
| Initial Choice | After Radiation (RADS) Information | Change from Initial to RADS | After ACR Guideline Information | Change from RADS to ACR | Never Changed* | |
|---|---|---|---|---|---|---|
| RADS-ACR Group (n = 58) | ||||||
| Ultrasound | 36 (62.0%) | 41 (70.7%) | +5 | 42 (72.4%) | +1 | 31 (86.1%) |
| CT (without contrast) | 10 (17.2%) | 4 (6.9%) | −6 | 10 (17.2%) | +6 | 4 (40.0%) |
| Radiography | ||||||
| Abdomen and pelvis | 11 (19.0%) | 8 (13.8%) | −3 | 6 (10.4%) | −2 | 2 (18.2%) |
| Voiding cystourethrography | 0 | 0 | 0 | 0 | 0 | 0 |
| Intravenous urography | 1 (1.8%) | 2 (3.4%) | +1 | 0 | −2 | 0 |
| MRI, with or without contrast | 0 | 3 (5.2%) | +3 | 0 | −3 | 0 |
| Arteriography kidneys | 0 | 0 | 0 | 0 | 0 | 0 |
| Initial vs radiation: P = NS | Radiation vs guideline: P = .05 | |||||
↵* The participant never changed the imaging order.
ACR-RADS, American College of Radiology Appropriateness Criteria then estimated radiation exposure information; CT, computed tomography; MRI, magnetic resonance imaging; NS, not significant; RADS-ACR, estimated radiation exposure information then American College of Radiology Appropriateness Criteria.