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Table 1: Signal intensity-to-noise-ratio (SNR) values in gray matter (GM) and white matter (WM) from the volunteers for selected metabolites
Metabolite Tissue Imager SNR at TE (ms)
30 144 288
N-acetylaspartate GM 3 T 191.6 ± 21.4 118.6 ± 14.5 88.5 ± 12.6
GM 1.5 T + PA 227.4 ± 23.1 142.2 ± 14.9 96.7 ± 14.6
GM 1.5 T 131.2 ± 18.1 106.2 ± 19.5 73.0 ± 20.6
WM 3 T 283.4 ± 38.5 168.4 ± 15.9 90.1 ± 10.8
WM 1.5 T + PA 245.7 ± 24.0 143.9 ± 16.0 108.8 ± 12.1
WM 1.5 T 149.9 ± 19.0 102.9 ± 9.6 78.9 ± 12.1
Creatine GM 3 T 110.4 ± 20.2 58.6 ± 9.9 33.6 ± 8.2
GM 1.5 T + PA 125.8 ± 9.2 67.4 ± 11.1 28.1 ± 9.3
GM 1.5 T 70.4 ± 11.4 43.2 ± 11.5 22.9 ± 11.6
WM 3 T 91.0 ± 12.9 66.1 ± 8.5 22.9 ± 5.9
WM 1.5 T + PA 103.3 ± 9.4 46.8 ± 6.3 24.8 ± 5.7
WM 1.5 T 61.5 ± 5.0 36.9 ± 2.1 17.9 ± 5.3
Choline GM 3 T 17.2 ± 2.8 16.1 ± 2.5 11.2 ± 2.1
GM 1.5 T + PA 16.9 ± 3.0 15.4 ± 3.2 10.2 ± 2.2
GM 1.5 T 12.5 ± 2.7 12.1 ± 2.8 6.8 ± 3.1
WM 3 T 38.1 ± 3.0 27.8 ± 4.6 11.1 ± 1.3
WM 1.5 T + PA 36.8 ± 3.3 23.0 ± 1.3 15.0 ± 2.1
WM 1.5 T 18.7 ± 2.2 15.0 ± 2.5 7.0 ± 2.2
NOTE:—TE indicates echo time (values are mean ± SD); PA, phased array.