Table 1.
Ranges of sodium concentrations and relaxation times in some human tissues in vivo (T1 and the fast and slow components of T2, i.e. T2,fast, and T2,slow, respectively). These ranges are based on Refs. [11,36–42] and references therein. WM – white matter, GM – grey matter, CSF – cerebrospinal fluid.
| Tissue | [Na+] (mM) | T1 (ms) | T2,fast (ms) | T2,slow (ms) |
|---|---|---|---|---|
| Brain | ||||
| WM | 20–60 | 15–35 | 0.8–3 | 15–30 |
| GM | 30–70 | 15–35 | 0.8–3 | 15–30 |
| CSF | 140–150 | 50–55 | – | 55–65 |
| Cartilage | 250–350 | 15–25 | 0.5–2.5 | 10–30 |
| Blood | 140–150 | 20–40 | 2–3 | 12–20 |
| Muscle | 15–30 | 12–25 | 1.5–2.5 | 15–30 |