Normal

NAA/Cr = 1.5 ± 0.2

Cho/Cr = 1.05 ± 0.23

NAA/Cho = 2.37 ± 0.40

Gliom low grade

NAA/Cr = 1.12 ± 0.48

Cho/Cr = 1.71 ± 0.63

NAA/Cho = 0.65 ± 0.37

Gliom high grade

NAA/Cr = 0.66 ± 0.37

Cho/Cr = 1.95 ± 0.72

NAA/Cho = 0.33 ± 0.17