Table 3.

Mean values of DTD-derived metrics for tumors and FGT.

Metrics	Tumors	FGT	p-Value
Mean diffusion tensor size (E[Diso])	1.43 (0.54)	2.33 (0.22)	<0.001
Variance of diffusion tensor sizes (V[Diso])	0.73 (0.19)	0.97 (0.33)	0.06
Mean diffusion tensor shape (E[D∆2])	0.47 (0.15)	0.27 (0.11)	<0.001
Fractional anisotropy (FA)	0.39 (0.07)	0.32 (0.08)	0.02
Orientational order parameter (OP)	0.38 (0.16)	0.38 (0.17)	0.71
Signal fraction of bin 1 (fbin1)	0.53 (0.27)	0.17 (0.14)	<0.001
Signal fraction of bin 2 (fbin2)	0.23 (0.11)	0.22 (0.07)	0.40
Signal fraction of bin 3 (fbin3)	0.29 (0.19)	0.62 (0.10)	<0.001

While E[D_iso] is expressed in 10⁻³ mm²/s, V[D_iso] is expressed in 10⁻⁶ mm⁴/s². Other coefficients are unitless. Numbers in brackets are standard deviations. FGT stands for fibroglandular tissue.