finite element method.

Radio frequency resonances inside a human head

RF equipment compliance tests employ electromagnetic field calculation in a head phantom to derive Specific Absorption Rate values. We have hypo­thesized that a biological tissue in certain conditions could act like a dielectric resonator hence affecting the field estimation. To study the resonance effects in a human head, we have formulated an eigenfrequency problem for a structurally realistic 2D human head phantom and solved it by the finite element method. The results have revealed 124 underdamped eigen­frequencies within a 0,2–2 GHz frequency band.

An anatomically realistic boundary representation phantom for studying vhf–uhf radiation effects

Both ionizing and non-ionizing radiation dosimetry studies, medical imaging technologies, and image reconstruction algorithms require computational phantoms to assess health effects, to analyze efficiency and to test algorithms. The goal of this study is to overview existing models of a human body and to develop the anatomically realistic boundary representation phantom for VHF–UHF electromagnetic and coupled field studies. We use simulated magnetic resonance images as the source of the phantom geometry.