From: Evaluation of the diagnostic utility on 1.5T and 3.0T 1H magnetic resonance spectroscopy for temporal lobe epilepsy
Metabolite ratio
1.5T-L
3.0T-L
1.5T-R
3.0T-R
NAA/Cr
1.000
0.997
0.974
NAA/Cho
0.934
0.998
0.859
NAA/(Cho + Cr)
0.996
0.960
Cho/Cr
0.073
0.283
0.184
0.059