Meeting Banner
Abstract #3796

Optimization of Radiative Surface Antenna for High Field Mri

zlem Ipek1, Alexander J.R. Raaijmakers1, Jan J. Lagendijk1, Cornelis A.T van den Berg1

1Radiotherapy and Radiology, UMC Utrecht, Utrecht, Netherlands

A novel radiative surface antenna consists of two copper strips placed on a dielectric rectangular substrate. It is investigated by means of electromagnetic modeling of the substrate material and the conductor dimensions in terms of impedance matching, effective B1+ delivery at depth and low local SAR. Such antenna design requires that its Poynting vector is directed into the target location and a dielectric substrate that ensures impedance matching at the antenna-body interface. When the dielectric constant of substrate is matched to that of the phantom, the radiative antenna is matched to 50 Ohm, thus its radiation efficiency is the highest.