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. 2013 Aug 15;26(12):1696–1704. doi: 10.1002/nbm.3005

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