TABLE 1.

Anatomical Structures of MRI-Based Head Model and Electrical Properties at 915 MHz and 1748 MHz

Anatomical structural entities	Density (kg/m3)	915 MHzd		1748 MHzd
		σ (S/m)	εr	σ (S/m)	εr
Brain
Gray matter	1030a	0.94	52.72	1.36	50.19
White matter	1030a	0.59	38.88	0.89	37.09
Cerebrospinal fluid	1010a	2.41	68.63	2.89	67.28
Non-brain
Adipose	920a	0.11	11.33	0.18	11.04
Air (respiration/digestion/sinus)	1.3b	0.00	1.00	0.00	1.00
Aqueous humor	1010a,c	1.64	68.90	2.00	68.60
Bone (facial)	1850b	0.14	12.45	0.27	11.81
Connective tissue	1100a	0.78	42.65	1.25	40.34
Cornea	1076c	1.39	55.23	1.83	52.87
CSF subarachnoid	1010a	2.41	68.63	2.89	67.28
Bone marrow	1080b	0.34	20.79	0.57	19.41
Dura	1030a	0.96	44.42	1.29	42.97
Ear/pinna	1100a	0.78	42.65	1.25	40.34
Epidermis	1100a	0.86	41.40	1.16	38.96
Inner table (skull)	1850b	0.14	12.45	0.27	11.81
Lens	1100c	0.79	46.57	1.12	45.41
Muscle	1040d	0.97	55.96	1.36	54.51
Nasal structures	1100a	0.78	42.65	1.25	40.34
Nerve	1040a	0.57	32.53	0.83	30.93
Orbital fat	920a	0.11	11.33	0.18	11.04
Outer table (skull)	1850b	0.14	12.45	0.27	11.81
Retina/choroid/sclera	1170a	1.17	55.27	1.57	53.65
Soft tissue	1100a	0.78	42.65	1.25	40.34
Spinal cord	1040a	0.57	32.53	0.83	30.93
Subcutaneous tissue	1100a	0.78	42.65	1.25	40.34
Subcutaneous fat	920a	0.11	11.33	0.18	11.04
Teeth	1850b	0.14	12.45	0.27	11.81
Tongue	1040d	0.97	55.96	1.36	54.51
Vitreous humor	1010a,c	1.64	68.90	2.00	68.60

^aRef. (30).

^bRef. (6).

^cRef. (31).

^dRef. (19).