Recent Progress and Future Challenges in MR Electric Properties Tomography

Table 1

Electric properties of different compartments of the brain of a healthy volunteer, measured with EPT at 1.5T [11]. The measured values agree with values expected from the literature [51]. Phase-based EPT yields slightly increased conductivities; magnitude-based EPT yields slightly decreased permittivities.

	Conductivity [S/m]			Relative permittivity
	Full EPT	Phase-based	Literature	Full EPT	Magnitude-based	Literature
	(7)	EPT (9)	[51]	(7)	EPT (10)	[51]
Gray matter	0.69±0.14	0.72±0.15	0.51	103±69	91±70	97.4
White matter	0.39±0.15	0.43±0.15	0.29	72±64	63±66	67.8
Cerebrospinal fluid	1.75±0.34	1.82±0.37	2.07	104±21	98±20	97.3