Table 2.
Experimentally estimated T1 and T2 values for synovial fluid, blood, LoB, LoD, and blood detection threshold at 1.5, 3, and 7 T
| Field strength | Relaxation time synovial fluid (ms) | Relaxation time blood (ms) | LoB (ms) | LoD (ms) | Blood detection threshold | |
|---|---|---|---|---|---|---|
| T1 | 1.5 T | 2641 ± 60 | 1258 ± 33 | 2541 | 2526 | ≥ 10% |
| 3 T | 2719 ± 72 | 1310 ± 33 | 2600 | 2560 | ≥ 25% | |
| 7 T | 2355 ± 145 | 1272 ± 160 | 2117 | 2040 | ≥ 50% | |
| T2 | 1.5 T | 845 ± 56 | 93 ± 11 | 753 | 298 | ≥ 50% |
| 3 T | 592 ± 13 | 28 ± 20 | 579 | 546 | ≥ 5% | |
| 7 T | 281 ± 5 | Not measurable | 272 | 218 | = 25% |
Results are reported as mean values, and the standard deviations as data were normally distributed (Kolmogorov-Smirnov test, p > 0.05)
Blood blood concentration 100%, Blood detection threshold blood concentration corresponding to the LoD, LoB limit of blank, LoD limit of detection, synovial fluid blood concentration 0%