. Author manuscript; available in PMC: 2017 May 1.

Published in final edited form as: Magn Reson Imaging. 2015 Dec 17;34(4):596–602. doi: 10.1016/j.mri.2015.12.006

Table 2.

Ratio of each biomarker value to contralateral normal-appearing white matter for meningioma and low-grade glioma (LGG).

	N	MTR	T₁	〈D〉	λ _AX	λ _RAD	FA
Tumor
Meningioma	9	0.79 ± 0.05^*	1.61 ± 0.12^*	1.22 ± 0.18^*	1.12 ± 0.17^*	1.29 ± 0.21^*	0.71 ± 0.19^*
LGG	9	0.69 ± 0.07^*	1.91 ± 0.40^*	1.92 ± 0.31^*	1.67 ± 0.23^*	2.10 ± 0.37^*	0.43 ± 0.11^*
p-value		0.002	< 0.05	<< 0.001	<< 0.001	<< 0.001	< 0.002
Edema
Meningioma	6	0.86 ± 0.051	1.36 ± 0.22^*	1.64 ± 0.26	1.56 ± 0.16	1.70 ± 0.34	0.90 ± 0.31^*
LGG	6	0.80 ± 0.067	1.62 ± 0.37^*	1.72 ± 0.02	1.55 ± 0.18	1.85 ± 0.28	0.58 ± 0.09^*
p-value		0.088	<< 0.001	0.56	0.95	0.43	< 0.05
Ipsilateral normal-appearing white matter
Meningioma	9	0.98 ± 0.02	1.05 ± 0.07	1.02 ± 0.03	1.02 ± 0.03	1.01 ± 0.04	1.04 ± 0.09
LGG	9	0.99 ± 0.01	1.02 ± 0.03	1.02 ± 0.03	1.02 ± 0.02	1.02 ± 0.03	1.00 ± 0.03
p-value		0.32	0.24	0.79	0.77	0.60	0.22

MTR = magnetization transfer ratio; T1 = longitudinal relaxation time; 〈D〉 = mean diffusivity; λ_AX = axial diffusivity; λ_RAD = radial diffusivity; FA = fractional anisotropy. p-value given for difference between meningioma and LGG in each ROI.

indicates statistical significance (p < 0.05).