Table 5 Reproducibility calculated as rn in percent for 54 pairs of consecutive spectra
From: Reproducibility of brain metabolite concentration measurements in lesion free white matter at 1.5 T
Protocol | 6 | 10 | 12 | 13a | 14 | 14 ref | 18 | 18 ref | 19a |
|---|---|---|---|---|---|---|---|---|---|
Naa | 4.4 | 2.3 | 2.5 | 2.5 | 3.1 | 4.5 | 2.2 | 4.2 | 2.3 |
Cre3 | 4.9 | 4.7 | 4.3 | 4.5 | 4.4 | 0 | 4.3 | 0 | 4.4 |
Cho | 5.3 | 5.3 | 4.7 | 4.7 | 4.1 | 4.9 | 4.8 | 5.2 | 4.9 |
Myo | 12.9 | 23.7 | 10.0 | 11.3 | 9.3 | 9.1 | 9.0 | 9.0 | 9.7 |
Glx | 7.7 | 5.7 | 12.9 | 13.5 | 4.6 | 6.0 | 5.2 | 5.7 | 5.5 |
Sum of all met. | 35.1 | 41.8 | 34.4 | 36.4 | 25.5 | 24.5 | 25.5 | 24.2 | 26.8 |
Naa, Cre3, Cho | 14.5 | 12.4 | 11.5 | 11.7 | 11.6 | (9.4) | 11.3 | (9.4) | 11.6 |
all–Myo | 22.2 | 18.2 | 24.4 | 25.2 | 16.2 | 15.4 | 16.5 | 15.1 | 17.1 |
all–Glx | 27.4 | 36.1 | 21.5 | 23.0 | 20.9 | 18.5 | 20.3 | 18.5 | 21.3 |
amp.(Naa) | 190.8 | 206.9 | 181.0 | 180.4 | 200.0 | 1.9 | 208.2 | 2.0 | 209.0 |
amp.(Cre3) | 96.5 | 95.9 | 97.3 | 97.5 | 104.5 | 1 | 105.4 | 1 | 106.5 |
amp.(Cho) | 28.2 | 28.5 | 29.4 | 29.3 | 31.5 | 0.3 | 31.7 | 0.3 | 32.0 |
amp. (Myo) | 55.3 | 66.9 | 57.1 | 57.9 | 68.4 | 0.6 | 71.5 | 0.7 | 71.4 |
amp. (Glx) | 226.5 | 279.7 | 155.9 | 159.7 | 322.3 | 3.1 | 261.8 | 2.5 | 255.7 |
±% of mean | |||||||||
Naa | 13.1 | 6.1 | 6.4 | 6.3 | 8.01 | 12.8 | 6.3 | 11.1 | 6.3 |
Cre3 | 11.2 | 13.2 | 11.7 | 11.5 | 10.9 | 0.0 | 11.4 | 0.0 | 11.1 |
Cho | 11.9 | 13.8 | 13.8 | 14.4 | 10.0 | 15.2 | 13.9 | 18.3 | 13.3 |
Myo | 57.2 | 88.2 | 35.7 | 50.2 | 34.0 | 33.4 | 28.2 | 28.2 | 28.9 |
Glx | 21.2 | 16.2 | 29.2 | 30.8 | 11.9 | 14.9 | 13.3 | 12.0 | 13.5 |