Table 1.
Mean T1, T1ρ, macromolecular fraction (f), and MTR values for various cadaveric human knee joint tissues including cartilage, menisci, ligaments, tendons, and muscle before and after elastix motion registration. The values in parentheses are percentage changes relative to the quantitative values before motion.
| T1 (ms) | T1ρ (ms) | f (%) | MTR (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Before motion | After motion | After registration | Before motion | After motion | After registration | Before motion | After motion | After registration | Before motion | After motion | After registration | |
| Meniscus | 596.4±1.9 | 707.8±7.1 (18.68%) | 626.8±10.2 (5.10%) | 22.4±1.1 | 40.3±13.6 (79.91%) | 24.4±1.7 (8.93%) | 21.6±1.0 | 28.5±20.2 (31.94%) | 21.0±0.6 (2.78%) | 52.5±0.3 | 23.9±17.7 (54.48%) | 53.0±0.7 (0.95%) |
| Femoral Cartilage | 723.8±16.2 | 990.9±286.5 (36.90%) | 652.2±10.1 (9.89%) | 42.7±1.2 | 21.6±1.3 (49.41%) | 38.5±0.2 (9.84%) | 16.3±1.8 | 18.2±12.3 (11.66%) | 15.2±1.1 (6.75%) | 40.6±1.3 | 13.8±7.1 (66.01%) | 43.8±1.0 (7.88%) |
| Tibial Cartilage | 713.5±27.4 | 1246.2±360.2 (74.66%) | 643.3±5.3 (9.84%) | 36.9±3.8 | 31.2±7.0 (15.45%) | 34.1±5.5 (7.59%) | 16.1±1.2 | 20.7±12.7 (28.57%) | 14.6±0.4 (9.32%) | 43.0±1.1 | 15.5±1.9 (63.95%) | 45.0±0.3 (4.65%) |
| Patellar Cartilage | 898.3±9.9 | 658.5±26.5 (26.69%) | 815.6±11.2 (9.21%) | 57.3±4.1 | 34.5±3.9 (39.79%) | 53.6±6.0 (6.46%) | 12.3±1.4 | 23.7±20.9 (92.68%) | 11.2±0.5 (8.94%) | 42.1±1.7 | 2.6±3.1 (93.82%) | 44.1±0.4 (4.75%) |
| Quadriceps tendon | 555.8±11.2 | 457.9±2.2 (17.61%) | 502.3±2.1 (9.63%) | 14.6±0.9 | 11.2±0.4 (23.29%) | 14.0±0.7 (4.11%) | 19.5±0.9 | 23.2±0.9 (18.97%) | 19.8±1.0 (1.54%) | 48.3±5.8 | 85.7±1.4 (77.43%) | 51.5±6.3 (6.63%) |
| Patellar Tendon | 506.1±16.8 | 109.0±187.6 (78.46%) | 531.9±16.2 (5.10%) | 19.7±1.0 | 13.3±0.5 (32.49%) | 17.8±0.3 (9.64%) | 25.1±2.4 | 10.2±0.0 (59.36%) | 27.5±3.8 (9.56%) | 43.1±2.1 | 79.6±1.8 (84.69%) | 47.3±2.9 (9.74%) |
| ACL | 736.2±82.6 | 507.1±32.1 (31.12%) | 665.1±8.2 (9.66%) | 29.6±3.9 | 26.8±4.1 (9.46%) | 29.0±3.7 (2.03%) | 14.6±2.3 | 9.9±5.7 (32.19%) | 13.3±1.3 (8.90%) | 45.8±5.3 | 43.9±10.9 (4.15%) | 48.7±5.1 (6.33%) |
| PCL | 710.7±46.8 | 495.9±3.0 (30.22%) | 648.5±13.1 (8.75%) | 33.9±4.2 | 26.8±2.0 (20.94%) | 34.7±5.8 (2.36%) | 16.7±0.8 | 6.7±6.5 (59.88%) | 15.4±0.7 (7.78%) | 46.5±0.3 | 35.7±13.3 (23.23%) | 48.1±1.2 (3.44%) |
| Muscle | 1058.9±4.7 | 1168.7±31.7 (10.37%) | 993.1±15.3 (6.21%) | 63.3±1.3 | 45.0±10.3 (28.91%) | 63.2±4.5 (0.16%) | 7.9±0.3 | 6.0±2.5 (24.05%) | 7.9±0.3 (0.00%) | 37.0±0.1 | 9.9±8.2 (73.24%) | 40.3±0.4 (8.92%) |