Table 1.
13C relaxation time constants of hyperpolarized [1,2-13C2]pyruvate and [1-13C]pyruvate in whole human blood at 37 °C
T1LF (s) at 1 mT | TS (s) at 1 mT | T1HF (s) at 9.4 T | |
---|---|---|---|
[1,2-13C2]pyruvate (non-oxygenated, n = 3) | <5 | 17 ± 2 | 38.5 ± 0.4 (C1), 30.0 ± 0.2 (C2) |
[1,2-13C2]pyruvate (oxygenated, n = 4) | <5 | 19 ± 2 | 38.3 ± 0.5 (C1), 30.6 ± 0.3 (C2) |
[1-13C]pyruvate (non-oxygenated, n = 2) | 8 ± 1 | N.A. | 45.0 ± 0.5 |
[1-13C]pyruvate (oxygenated, n = 2) | 9 ± 2 | N.A. | 40 ± 2 |