Table 3. MRI relaxation constants of the articular and sub-articular viable and necrotic epiphyseal cartilage.
| Time [weeks] | Cartilage | T1 [s] | T2 [ms] | T1ρ [ms] | Adiabati T1ρ [ms] | TRAFF [ms] |
|---|---|---|---|---|---|---|
| 3 | Articular | 1.56±0.14 | - | 133.7±27.0 | 275.8±51.3 | 248.7±49.0 |
| Viable | 1.23±0.06 | - | 90.8±7.4 | 193.3±14.5 | 133.2±12.3 | |
| Necrotic | 1.61±0.08 | - | 137.9±12.6 | 288.8±24.1 | 244.0±21.0 | |
| 5 | Articular | 1.51±0.04 | 92.5±8.4 | 123.7±12.4 | 252.0±29.1 | 149.0±9.9 |
| Viable | 1.17±0.03 | 54.6±4.4 | 88.0±3.9 | 180.2±8.8 | 102.4±4.6 | |
| Necrotic | 1.91±0.09 | 106.6±13.1 | 205.3±18.1 | 413.3±42.1 | 230.2±22.4 | |
| 9 | Articular | 1.45±0.07 | 74.2±7.4 | 99.2±9.1 | 188.9±17.6 | 143.0±11.5 |
| Viable | 1.31±0.06 | 59.6±9.5 | 89.1±7.4 | 180.7±14.7 | 127.0±11.3 | |
| Necrotic | 2.08±0.08 | 136.4±17.9 | 207.3±18.5 | 414.3±61.6 | 286.4±34.5 | |
| 4 | Articular | 1.62±0.16 | 68.4±15.9 | 95.2±24.2 | 223.0±48.3 | 175.7±35.9 |
| Viable | 1.34±0.06 | 32.6±8.7 | 57.2±9.1 | 157.9±16.2 | 100.8±14.3 | |
| Necrotic | 1.38±0.04 | 44.0±3.4 | 64.4±3.5 | 162.5±10.4 | 126.4±5.1 | |
| 6 | Articular | 1.78±0.24 | 84.8±16.9 | 100.1±21.6 | 283.2±61.0 | 144.1±28.4 |
| Viable | 1.29±0.04 | 22.8±5.9 | 58.2±4.3 | 147.9±9.9 | 60.7±9.6 | |
| Necrotic | 1.45±0.05 | 46.1±4.8 | 79.7±3.7 | 181.7±11.2 | 100.1±7.1 | |
| 10 | Articular | 1.58±0.13 | 61.9±10.0 | 85.7±13.9 | 201.6±37.0 | 134.4±19.4 |
| Viable | 1.27±0.04 | 23.0±5.9 | 53.5±4.2 | 134.7±9.6 | 69.0±6.6 | |
| Necrotic | 1.56±0.17 | 38.9±18.4 | 128.5±19.5 | 234.2±35.4 | 137.3±11.2 |
Large lesion (5 × 5 mm incision): 3, 5, 9, weeks post-surgery
Small lesion (3 × 4 mm incision): 4, 6, 10 weeks post-surgery
Due to technical problems, the T2 measurement was invalid for the 3-week specimen and was not included.