Table 2 Estimates of metabolite parameters within regions of tumor.

The values shown are the median (range) of the SNR for hyperpolarized [1-13C]lactate, hyperpolarized [1-13C]pyruvate, and the ratios of these metabolites in tumor voxels for the patients shown in Figs. 5 and 6.

Subjectn voxels[1-13C]Lactate/[1-13C]pyruvate[1-13C]Lactate SNR[1-13C]Pyruvate SNR
Patient A110.28 (0.26–0.36)13.6 (5.9–18.6)41.0 (17.5–54.0)
Patient B60.38 (0.32–0.47)4.8 (3.6–7.8)13.5 (10.1–20.0)
Patient C30.32 (0.27–0.33)6.3 (4.1–7.3)22.5 (12.8–23.0)
Patient D40.28 (0.24–0.33)8.4 (6.4–16.1)30.0 (27.8–49.4)