Anatomically and Dielectrically Realistic 2.5D 5-Layer Reconfigurable Head Phantom for Testing Microwave Stroke Detection and Classification

Table 4

Dielectric properties at 1 GHz of the different tissue-equivalent layers of the human head phantom for stroke detection. The measured data are supplemented with extended uncertainties (k = 2).

Tissue layer	εr (−) human	εr (−) measured	σ (S/m) human	σ (S/m) measured
Scalp	31.06	34.16 ± 1.33	0.64	0.77 ± 0.08
Skull	11.97	12.17 ± 0.53	0.09	0.11 ± 0.01
CSF	68.44	82.81 ± 2.46	2.46	2.99 ± 0.04
Brain	46.57	45.33 ± 0.78	0.97	0.98 ± 0.01
Ischemic stroke	37.26	36.43 ± 0.66	0.78	0.87 ± 0.01
Hemorrhagic stroke	61.08	55.78 ± 2.18	1.59	1.80 ± 0.09