On the Forward Scattering of Microwave Breast Imaging

Figure 3

Dielectric Profiles of the breast volume with healthy tissue and tumor using the Debye model. The Debye model is given by 𝜀(𝑓)=𝜀_∞−𝑗𝜎/(2𝜋𝑓𝜀₀)+(𝜀_𝑠−𝜀_∞)/(1+𝑗𝑓/𝑓_𝑝), where 𝜀₀=8.854×10⁻¹²F/m, 𝑓_𝑝=25GHz, and 𝜎=0.15S/m. For healthy tissue, 𝜀_𝑠=10 and 𝜀_∞=7. For the tumor, 𝜀_𝑠=50 and 𝜀_∞=35 [3].