Scan-to-scan variability for the water peak intensity method
| Lobe and Metabolite | Relative Variability | Relative Variability (%) | Absolute Variability | Absolute Variability (%) | ||||
|---|---|---|---|---|---|---|---|---|
| Right | Left | Right | Left | Right | Left | Right | Left | |
| Temporal lobe (n = 14) | ||||||||
| NAA | 0.1 ± 1.0 | −0.1 ± 0.7 | 2 ± 17 | −1 ± 11 | 0.8 ± 0.7 | 0.6 ± 0.3 | 12 ± 11 | 9 ± 5 |
| NAA+NAAG | 0.4 ± 1.0 | 0.5 ± 1.2 | 6 ± 12 | 7 ± 16 | 0.8 ± 0.7 | 0.8 ± 0.9 | 10 ± 9 | 10 ± 14 |
| Cr | 0.4 ± 0.9 | 0.2 ± 0.8 | 7 ± 18 | 4 ± 15 | 0.6 ± 0.8 | 0.7 ± 0.4 | 12 ± 15 | 12 ± 9 |
| mI | 0.0 ± 1.5 | 0.4 ± 0.9 | 7 ± 35 | 11 ± 25 | 1.2 ± 0.8 | 0.7 ± 0.7 | 28 ± 20 | 17 ± 21 |
| Cho | 0.1 ± 0.2 | 0.0 ± 0.2 | 9 ± 17 | 3 ± 12 | 0.5 ± 0.2 | 1.6 ± 1.5 | 15 ± 12 | 10 ± 7 |
| Glx | 0.1 ± 0.6 | −0.9 ± 2.0 | 2 ± 6 | −8 ± 19 | 0.5 ± 0.2 | 1.6 ± 1.5 | 5 ± 3 | 15 ± 13 |
| Frontal lobe (n = 14) | ||||||||
| NAA | 0.0 ± 0.5 | 0.1 ± 0.5 | 1 ± 7 | 2 ± 7 | 0.4 ± 0.3 | 0.4 ± 0.4 | 7 ± 5 | 5 ± 5 |
| NAA+NAAG | −0.3 ± 0.6 | −0.0 ± 0.9 | −3 ± 7 | 0 ± 10 | 0.5 ± 0.3 | 0.7 ± 0.6 | 6 ± 4 | 7 ± 7 |
| Cr | 0.0 ± 0.5 | −0.0 ± 0.5 | 1 ± 10 | −1 ± 9 | 0.4 ± 0.3 | 0.4 ± 0.3 | 8 ± 6 | 7 ± 6 |
| mI | 0.2 ± 1.2 | 0.2 ± 0.8 | −1 ± 17 | 6 ± 21 | 0.7 ± 1.0 | 0.7 ± 0.4 | 13 ± 10 | 19 ± 10 |
| Cho | 0.0 ± 0.5 | 0.0 ± 0.2 | 1 ± 15 | 4 ± 17 | 0.2 ± 0.1 | 0.2 ± 0.1 | 12 ± 9 | 12 ± 12 |
| Glx | 0.7 ± 1.0 | −1.0 ± 0.8 | 8 ± 12 | −9 ± 8 | 0.9 ± 0.8 | 1.0 ± 0.8 | 10 ± 9 | 9 ± 8 |