Variable | Cho, % | Cr, % | NAA, % | NAA+NAAG, % |
---|---|---|---|---|
With reciprocity | 100.0 | 100.0 | 100.0 | 100.0 |
Coefficient of variance | 13.5 | 9.3 | 11.6 | 12.3 |
Flip angle correction | 93.2 | 94.7 | 94.2 | 93.7 |
+ CSF | 97.7 | 99.2 | 98.7 | 98.2 |
+ Differential T2 | 104.0 | 109.7 | 102.8 | 102.3 |
+ Boltzmann | 108.2 | 114.1 | 107.0 | 106.4 |
Note:—The top row 100% represents the concentrations without any correction other than the reciprocity correction. Subsequent rows show the accumulated effect of additional quantification step on the concentration values. Fully corrected relative values are shown in the last row. Cho indicates choline; Cr, creatine; NAA, N-acetylaspartate; NAAG, N-acetyl aspartylglutamate.