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. Author manuscript; available in PMC: 2023 Mar 20.
Published in final edited form as: J Biosci Med (Irvine). 2023 Feb;11(2):177–185. doi: 10.4236/jbm.2023.112013

Table 2.

Properties of the Seven Different Layers of the Brain at a frequency of 64 MHz.

Layer Radius (mm) Permittivity (er) Permeability Conductivity (S/m) Mass Density (kg/m3)
Skin 51.0 32 1 0.1483 1109.0
Fat 49.0 9 1 0.0776 0911.0
Muscle 47.0 50 1 0.4466 1090.4
Skull 45.0 10 1 0.0179 1908.0
Dura 36.5 40 1 0.0600 1174.0
CSF 36.0 65 1 1.8790 1007.0
Brain 28.1 40 1 0.6165 1045.5
HHS Vulnerability Disclosure