TABLE 2:

Scan-to-scan variability for the calibration phantom method

Lobe and MetaboliteRelative VariabilityRelative Variability (%)Absolute VariabilityAbsolute Variability (%)
RightLeftRightLeftRightLeftRightLeft
Temporal lobe (n = 14)
    NAA0.2 ± 0.7−0.5 ± 1.07 ± 18−4 ± 130.9 ± 0.80.7 ± 0.315 ± 1212 ± 6
    NAA+NAAG0.3 ± 1.20.5 ± 1.2−5 ± 17−9 ± 170.9 ± 0.81.1 ± 0.713 ± 1216 ± 10
    Cr0.3 ± 1.0−0.0 ± 0.9−8 ± 270 ± 170.7 ± 0.80.6 ± 0.518 ± 2213 ± 10
    mI−0.1 ± 1.00.1 ± 0.5−0 ± 26−3 ± 170.7 ± 0.50.4 ± 0.222 ± 1415 ± 9
    Cho0.0 ± 0.30.1 ± 0.2−5 ± 21−5 ± 120.3 ± 0.20.2 ± 0.118 ± 1211 ± 6
    Glx0.5 ± 2.0−0.3 ± 3−10 ± 24−2.5 ± 391.4 ± 0.82 ± 220 ± 1529 ± 25
Frontal lobe (n = 14)
    NAA0.0 ± 0.60.0 ± 0.51 ± 100.5 ± 90.5 ± 0.30.4 ± 0.48 ± 46 ± 6
    NAA+NAAG−0.3 ± 1.7−0.2 ± 0.7−4 ± 243 ± 100.8 ± 1.50.6 ± 0.412 ± 218 ± 6
    Cr0.1 ± 0.5−0.1 ± 0.37 ± 6−3 ± 130.4 ± 0.30.3 ± 0.211 ± 77 ± 6
    mI0.0 ± 0.50.0 ± 0.6−4 ± 23−5 ± 260.4 ± 0.40.4 ± 0.415 ± 1818 ± 20
    Cho0.0 ± 0.20.0 ± 0.2−2.5 ± 15−3 ± 170.1 ± 0.10.1 ± 0.111 ± 1112 ± 12
    Glx0.8 ± 1.00.0 ± 0.9−12 ± 17−1 ± 130.9 ± 0.90.6 ± 0.613 ± 169 ± 9