Table 2.
T1ρ Relaxation Times a
| T1ρ Relaxation Time, ms | |||||
|---|---|---|---|---|---|
| Region of Interest | ACLR Limb | Uninjured Limb | P Value | ILR (ACLR/Uninjured) | Cohen d |
| LFC | |||||
| Global | 53.5 ± 3.4 | 47.9 ± 3.7 | <.001 | 1.13 ± 0.09 | 1.58 |
| Posterior | 57.1 ± 5.8 | 53.2 ± 5.9 | .010 | 1.08 ± 0.14 | 0.66 |
| Central | 52.8 ± 3.8 | 47.1 ± 4.3 | <.001 | 1.13 ± 0.12 | 0.66 |
| Anterior | 50.8 ± 3.9 | 43.4 ± 3.2 | <.001 | 1.17 ± 0.10 | 2.07 |
| LTC | |||||
| Global | 48.7 ± 2.7 | 47.3 ± 3.7 | .036 | 1.04 ± 0.07 | 0.43 |
| Posterior | 50.9 ± 3.1 | 47.5 ± 3.8 | <.001 | 1.08 ± 0.09 | 0.98 |
| Central | 44.6 ± 3.1 | 43.1 ± 3.8 | .034 | 1.04 ± 0.09 | 0.43 |
| Anterior | 50.6 ± 3.9 | 51.2 ± 5.6 | .413 | 0.99 ± 0.08 | 0.12 |
| MFC | |||||
| Global | 54.5 ± 3.8 | 49.3 ± 2.5 | <.001 | 1.11 ± 0.07 | 1.62 |
| Posterior | 52.8 ± 4.5 | 50.3 ± 3.0 | .005 | 1.05 ± 0.08 | 0.65 |
| Central | 54.3 ± 4.6 | 47.8 ± 2.5 | <.001 | 1.14 ± 0.08 | 1.76 |
| Anterior | 56.5 ± 4.6 | 49.7 ± 3.4 | <.001 | 1.14 ± 0.08 | 1.68 |
| MTC | |||||
| Global | 48.8 ± 3.8 | 46.5 ± 3.9 | .001 | 1.05 ± 0.07 | 1.68 |
| Posterior | 47.5 ± 3.9 | 45.5 ± 4.0 | .011 | 1.05 ± 0.09 | 0.51 |
| Central | 47.1 ± 4.3 | 44.8 ± 4.9 | .002 | 1.06 ± 0.08 | 0.50 |
| Anterior | 51.9 ± 5.3 | 49.1 ± 3.9 | .006 | 1.06 ± 0.10 | 0.60 |
a Data are reported as mean ± SD. Boldface P values indicate a statistically significant difference between the ACLR and uninjured limbs (P ≤ [.05/4]). ACLR, anterior cruciate ligament reconstruction; ILR, interlimb ratio; LFC, lateral femoral condyle; LTC, lateral tibial condyle; MFC, medial femoral condyle; MTC, medial tibial condyle.