Table 2 Coefficients and relevant expressions used in Helmholtz sub-domains that govern each layer of human head phantom
Coefficient “c” | Coefficient “a” | |
|---|---|---|
Layer 1 | \( \frac{1}{{3\left( {\mu_{a1} + \mu_{s1}^{'} } \right)}} \) | \( \mu_{a1} \) |
Layer 2 | \( \frac{1}{{3\left( {\mu_{a2} + \mu_{s2}^{'} } \right)}} \) | \( \mu_{a2} \) |
Layer 3 | \( \frac{1}{{3\left( {\mu_{a3} + \mu_{s3}^{'} } \right)}} \) | \( \mu_{a3} \) |
Occlusion | \( \frac{1}{{3\left( {\mu_{a4} + \mu_{s4}^{'} } \right)}} \) | \( \mu_{a4} \) |