Numerical dosimetry of anatomically inhomogeneous animal models using an improved FDTD boundary implementation

A PML (perfect matched layer) absorbing boundary condition (ABC) has been used to improve the accuracy of a widely used numerical dosimetry program based on the FDTD algorithm. The original algorithm implementation was based on the separation of the incident and scattered fields combined with second order Mur boundary conditions. This study has shown that the difference between the results obtained using PML and Mur boundary implementations varies with the radiation frequency, ranging from below 10% for frequencies above 900MHz and significantly higher percentage at the lower frequencies (around %160 at 160MHz).