The patient and volunteer characteristics and MR imaging findings
| Volunteers | Patients | |
|---|---|---|
| Cases | 17 | 144 |
| Male | 12 | 34 |
| Female | 5 | 110 |
| Age (yr) | ||
| Range | 23–32 | 11–80 |
| Median | 26 | 36 |
| Articular disk position and function (joints) | ||
| Normal superior | 34 | 113 |
| PADDWR | 0 | 18 |
| PADDWOR | 0 | 2 |
| ADDWR | 0 | 48 |
| ADDWOR | 0 | 107 |
| Articular disk configuration (joints) | ||
| Biconcave | 32 | 143 |
| Biplanar | 2 | 20 |
| Hemiconvex | 0 | 37 |
| Thickening of the posterior band | 0 | 36 |
| Biconvex | 0 | 7 |
| Folded | 0 | 45 |
| Joint effusion (joints) | ||
| None or minimal fluid | 34 | 169 |
| Moderate fluid | 0 | 80 |
| Marked fluid | 0 | 24 |
| Extensive fluid | 0 | 15 |
| Osteoarthritis (joints) | ||
| Negative | 34 | 237 |
| Positive | 0 | 51 |
| Bone marrow abnormality (joints) | ||
| Negative | 34 | 260 |
| Positive | 0 | 28 |