Title :
A quasi-static model for the ring capacitor applicator
Author :
Sowinski, Maciej J. ; Van Putten, Maurice H P M ; Van Den Berg, Peter M. ; Van Rhoon, Gerard C.
Author_Institution :
Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands
Abstract :
An investigation of the electromagnetic heat dissipation in a radially layered biological tissue inside a ring capacitor applicator is discussed. A quasi-static model is introduced to compute the relevant electromagnetic field quantities. The method of computation uses the spatial Fourier transform of all field quantities with respect to the axial coordinate. After an iterative solution of a dual boundary value problem for the electric potential and the current density at the electrodes, an inverse Fourier transform is carried out to compute the quantities that are of interest to the deep-body system at hand. Comparison of numerical results with phantom measurements shows excellent agreement.
Keywords :
biothermics; physiological models; radiation therapy; radiofrequency heating; axial coordinate; current density; dual boundary value problem; electric potential; electromagnetic heat dissipation; inverse Fourier transform; iterative solution; numerical results; phantom measurements; quasi-static model; radially layered biological tissue; ring capacitor applicator; spatial Fourier transform; Applicators; Biological system modeling; Biological tissues; Biology computing; Boundary value problems; Capacitors; Electromagnetic fields; Electromagnetic heating; Electromagnetic modeling; Fourier transforms; Electric Conductivity; Electrodes; Electromagnetic Fields; Electromagnetics; Fourier Analysis; Heat; Humans; Hyperthermia, Induced; Mathematics; Models, Biological;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
