Table 3.
Parameter quantification for 10 ROIs with mean and standard deviation along with percentage error. A total of 20 subjects were evaluated for the current study. Error estimates include either an underestimation or overestimation from reference value denoted by the sign. Abbreviations of each ROI are presented on the left side of table. Mean error can be estimated as less than 5% with exceptions in PCL, which is a difficult region to quantify due to the small ROI size and strong partial volume effect through planes (ACL = anterior cruciate ligament, AFC = anterior femoral cartilage, MFC = medial femoral cartilage, PC = patellar cartilage, PFC = posterior femoral cartilage, TPC = tibial plateau cartilage, ALM = anterior lateral meniscus, PLM = posterior lateral meniscus, PCL = posterior cruciate ligament, and PT = patellar tendon).
| Undersampling (%) | ACL | AFC | MFC | PC | PFC | TPC | ALM | PLM | PCL | PT | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T1 (ms) | Fully sampled | 822.8 ± 103.6 | 584.1 ± 73.9 | 553.5 ± 118.7 | 605.1 ± 102.5 | 557.1 ± 80.5 | 501.4 ± 93.1 | 690.3 ± 104 | 894.5 ± 101.3 | 838.7 ± 103.7 | 582.6 ± 81.2 |
| 25 | 801.6 ± 145.7 (2.6%) |
598.5 ± 75.6 (−2.5%) |
536.8 ± 89.7 (3%) |
631.3 ± 121.8 (−4.3%) |
534.2 ± 71.5 (4.1%) |
480.8 ± 87.5 (4.1%) |
683.6 ± 90.7 (1%) |
791.7 ± 100.2 (1.5%) |
766.5 ± 104.5 (8.6%) |
589.2 ± 87.5 (−1.1%) |
|
| 35 | 783.9 ± 160.4 (4.7%) |
598.9 ± 76.8 (−2.5%) |
531.8 ± 87.8 (3.9%) |
633.9 ± 125.6 (−4.8%) |
521.3 ± 76.5 (6.4%) |
478.4 ± 94 (4.6%) |
669.3 ± 92.3 (3%) |
749.2 ± 103.2 (4.6%) |
755.7 ± 100.5 (9.9%) |
590.9 ± 88.2 (−1.4%) |
|
| 50 | 779.4 ± 132.4 (5.3%) |
601.3 ± 76.6 (−2.9%) |
528.5 ± 94.3 (4.5%) |
635.5 ± 120.4 (−5%) |
521.3 ± 76.1 (6.4%) |
474.5 ± 94.9 (5.4%) |
669.6 ± 95.2 3.0%) |
744.8 ± 105.6 (5.6%) |
726.7 ± 98.5 (13.4%) |
592 ± 86.7 (−1.6%) |
|
| 65 | 775.5 ± 125.6 (5.7%) |
604 ± 78.2 (−3.4%) |
526.5 ± 94 (4.9%) |
637.8 ± 129.2 (−5.4%) |
519.9 ± 78.2 (6.7%) |
466.8 ± 92.2 (6.4%) |
667.1 ± 96.4 (3.4%) |
770.1 ± 108.5 (6.2%) |
722.8 ± 103.5 (13.8%) |
593.8 ± 87.1 (−1.9%) |
|
| Adiab-T1ρ (ms) | Fully sampled | 29.0 ± 9.2 | 36.0 ± 8.4 | 27.0 ± 7.4 | 29.2 ± 5.2 | 25.7 ± 6.5 | 22.0 ± 6.5 | 27.2 ± 5.7 | 25.2 ± 5.1 | 21.7 ± 6.7 | 16.3 ± 5.6 |
| 25 | 28.2 ± 11.4 (2.7%) |
35.9 ± 8.4 (0.2%) |
25.6 ± 6.4 (5.2%) |
29.5 ± 5.6 (−0.9%) |
24.3 ± 6.1 (5.4%) |
21.1 ± 5.5 (4.1%) |
26.6 ± 5.6 (2.2%) |
23.8 ± 5.6 (5.6%) |
19.8 ± 6.4 (8.9%) |
16.3 ± 5.7 (0.2%) |
|
| 35 | 28.1 ± 10.4 (3.1%) |
36.1 ± 8.5 (−0.3) |
25.4 ± 6.2 (5.9%) |
29.5 ± 7.6 (−0.9%) |
24.0 ± 6 (6.6%) |
20.9 ± 5.8 (5.0%) |
26.5 ± 5.5 (2.5%) |
23.1 ± 5.4 (8.3%) |
19.5 ± 6.5 (10.3%) |
16.2 ± 5.6 (0.8%) |
|
| 50 | 28 ± 11.4 (3.3%) |
35.8 ± 8.4 (0.5%) |
25.2 ± 6.5 (6.7%) |
29.6 ± 5.4 (−1.2%) |
23.9 ± 6.1 (6.9%) |
20.9 ± 5.4 (5.0%) |
26.2 ± 5.8 (3.6%) |
22.5 ± 5.4 (10.8%) |
19.3 ± 6.8 (11.2%) |
16.2 ± 5.7 (0.8%) |
|
| 65 | 27.1 ± 11.1 (6.5%) |
36.4 ± 8.5 (−1.2%) |
25.2 ± 6.8 (6.7%) |
29.6 ± 5.6 (−1.2%) |
23.7 ± 6 (7.7%) |
20.7 ± 6.2 (6.0%) |
26 ± 5.6 (4.4%) |
22.5 ± 5.8 (10.8%) |
18.9 ± 6.8 (13.1%) |
16.0 ± 5.8 (1.8%) |
|
| MMF (%) | Fully sampled | 8.6 ± 3.0 | 7.9 ± 1.5 | 10.9 ± 3.8 | 9.8 ± 2.2 | 10.3 ± 2.2 | 12.7 ± 2.2 | 10.2 ± 2.4 | 12 ± 2.3 | 10.9 ± 2.4 | 11.9 ± 3.1 |
| 25 | 8.6 ± 3.3 (0%) |
7.8 ± 1.5 (1.3%) |
10.7 ± 2.7 (1.8%) |
9.8 ± 2.4 (0%) |
10.2 ± 2.4 (1%) |
12.7 ± 2.2 (0%) |
10.2 ± 2.4 (0%) |
12.2 ± 2.3 (−1.7%) |
11.0 ± 2.8 (−1%) |
11.7 ± 3.1 (1.7%) |
|
| 35 | 8.4 ± 3 (2.3%) |
7.8 ± 1.5 (1.3%) |
10.7 ± 2.7 (1.8%) |
9.9 ± 2.6 (−1%) |
10.2 ± 2.5 (1%) |
12.8 ± 2.2 (−0.8%) |
10.3 ± 2.3 (−1%) |
12.3 ± 2.3 (−2.5%) |
11.2 ± 2.8 (−2.7%) |
11.6 ± 3.2 (2.5%) |
|
| 50 | 8.3 ± 3 (3.5%) |
7.8 ± 1.5 (1.3%) |
10.6 ± 2.6 (2.8%) |
9.9 ± 2.6 (−1%) |
10.1 ± 2.6 (1.9%) |
12.8 ± 2.2 (−0.8%) |
10.4 ± 2.3 (−2%) |
12.3 ± 2.4 (−2.5%) |
11.2 ± 2.8 (−2.7%) |
11.6 ± 3.2 (2.5%) |
|
| 65 | 8.3 ± 2.8 (3.5%) |
7.7 ± 1.5 (2.5%) |
10.6 ± 2.6 (2.8%) |
9.9 ± 2.6 (−1%) |
10.7 ± 2.6 (−3%) |
13 ± 2.2 (−2.3%) |
10.4 ± 2.3 (−2%) |
12.5 ± 2.5 (−4.1%) |
11.2 ± 2.8 (−2.7%) |
12.2 ± 3.3 (−2.5%) |