Table 1.
Reported Measurements of T1 in WM at 7T
| Study | Reported WM T1 (ms) | Region | Sequence and Parameters |
|---|---|---|---|
| Li and Deoni (4) | 1500 ± 100 | Not stated | DESPOT1, flip angle = 5°/10°/20° |
| Rooney et al. (5) | 1220 ± 36 | Frontal | Look-Locker, 32 TIs, 20 ms to 10 s |
| Ikonomidou et al. (6) | 1357 ± 22 | Not stated | IR-EPI, TIs 30–8000 ms |
| Wright et al. (7) | 1017 ± 86 | Cortical | IR-FSE, 9 TIs, 120–2000 ms |
| Wright et al. (8)a | ~1250? | Cortical | IR-EPI, 9 TIs, 120–4000 ms |
| Wright et al. (8) | 1130 +/100 | Cortical | MPRAGE, 8 TIs, 160–2100 ms |
| Grinstead and Rooney (9) | 1180 ± 40 | Not stated | IR-EPI, TI values not reported |
| Marques et al. (10) | 1150 ± 60 | Frontal | MP2RAGE, TI = 1000/3300 ms |
| Marques et al. (10) | 1110 ± 60 | Corpus callosum | MP2RAGE, TI = 1000/3300 ms |
| Dortch et al. (11) | 1372 | Global mean | Selective IR qMT, 15 TIs, 6 ms to 2s |
| Dieringer et al. (12) | 1284 ± 22 | Global mean | IR-FSE, 8 TIs, 60–5000 ms |
| Dieringer et al. (12) | 1855 ± 141 | Global mean | 2D VFA, flip angle = 3°/8°/25° |
Abbreviations: DESPOT1, driven equilibrium single point observation of T1; IR-EPI, inversion recovery echo planar imaging; IR-FSE, inversion recovery fast spin echo; MPRAGE, magnetization prepared rapid acquisition of gradient echo; MP2RAGE, magnetization prepared 2 rapid acquisition gradient echoes; qMT, quantitative magnetization transfer; VFA, variable flip angle.
a
The measurement using IR-EPI is not reported in the text but is inferred from Figure 5 in Wright et al. 2008.