Table 1. Mean and corresponding sample standard deviations for FGT volume, total breast volume and %FGT measured from the different Dixon datasets in 10 volunteers.
Sequence Type | HR GRE PD | HR GRE PD (R) | HR GRE T1 | LR GRE PD | LR GRE T1 | LR SE T1 |
---|---|---|---|---|---|---|
FGT Volume [cm3] | 143.7 ± 63.5 | 135.2 ± 56.2 | 157.6 ± 69.5 | 134.2 ± 57.8 | 153.7 ± 68.8 | 207.3 ± 109.4 |
Total Breast Volume [cm3] | 492.6 ± 299.2 | 482.6 ± 296.2 | 492.6 ± 299.2 | 484.2 ± 298.6 | 484.2 ± 298.6 | 484.2 ± 298.6 |
%FGT | 36.3 ± 16.5 | 35.4 ± 16.2 | 39.2 ± 16.3 | 35.2 ± 16.5 | 39.1 ± 16.1 | 47.8 ± 11.6 |
SI correction factor | 1.21 ± 0.16 | 1.07 ± 0.18 | 3.27 ± 0.38 | 1.14 ± 0.22 | 3.36 ± 0.68 | 2.91 ± 0.63 |
FGT = Fibroglandular tissue, HR = High Resolution, LR = Low Resolution, GRE = Gradient Echo, SE = Spin Echo, PD = Proton Density, SI = Signal Intensity, (R) indicates a repeat dataset used to generate repeatability measurements.