Table 2.
Field strength variability in T1 and T2*/R2* in renal cortex and renal medulla, and corticomedullary differentiation (medulla-cortex) for healthy participants.
| Parameter | Field strength (T) | Renal cortex | Renal medulla | Corticomedullary differentiation (medulla-cortex) | |||
|---|---|---|---|---|---|---|---|
| Mean ± std.dev. | Number of subjects | Mean ± std.dev. | Number of subjects | Mean ± std.dev. | Number of subjects | ||
| T1 SE-EPI | 1.5 | 1,024 ± 71 ms | 8 | 1,272 ± 140 ms | 8 | 248 ± 68 ms | 8 |
| 3 | 1,367 ± 79 ms | 21 | 1,655 ± 76 ms | 20 | 286 ± 58 ms | 20 | |
| T1 bFFE | 1.5 | 1,053 ± 72 ms | 58 | 1,318 ± 98 ms | 38 | 265 ± 38 ms | 38 |
| 3 | 1,124 ± 114 ms | 26 | 1,388 ± 126 ms | 25 | 268 ± 80 ms | 25 | |
| T2* | 1.5 | 70.7 ± 2.4 ms | 8 | 40.7 ± 2.8 ms | 8 | −30.0 ± 5.2 ms | 8 |
| 3 | 49.6 ± 6.6 ms | 18 | 29.7 ± 5.4 ms | 18 | −19.9 ± 5.1 ms | 18 | |
| R2* | 1.5 | 14.2 ± 0.5 s−1 | 8 | 24.6 ± 1.7 s−1 | 2 | 10.5 ± 2.2 s−1 | 8 |
| 3 | 20.6 ± 3.3 s−1 | 18 | 34.9 ± 6.9 s−1 | 18 | 14.3 ± 5.0 s−1 | 18 | |
T1, longitudinal relaxation time; SE-EPI, spin echo-echo planar imaging; bFFE, balanced fast field echo; T2*, transverse relaxation time; R2*, transverse relaxation rate.