| Definition of concept | Correct (%) | Incorrect (%) | Don’t know (%) | Total |
| Useful exam | 38 (25.2) | 113 (74.8) | 0 (0.0) | 151 |
| Justified exam | 14 (9.3) | 95 (62.9) | 42 (27.8) | 151 |
| Radiating exam | 108 (71.5) | 35 (23.2) | 8 (5.3) | 151 |
| Indicated exam | 106 (70.2) | 44 (29.1) | 1(0.7) | 151 |
| Inadvisable exam | 122 (80.8) | 27 (17.9) | 2 (1.3) | 151 |
| Average % | (51.4) | (41.6) | (7.0) | - |