Optimal-permittivity dielectric liners for a 4.7T Transceiver Array

Placing dielectric pads adjacent to the imaging region is an effective method to increase the signal locally and also increase the radio frequency magnetic field homogeneity in magnetic resonance imaging. The use of local high permittivity pads is becoming more common, and this work focuses on the effect of larger dielectric pads on the transmit/receive performance of an array (e.g., coupling, efficiency and safety) having 8 channels, used to image a cylindrical phantom at 4.7T (200MHz). We investigate the effects of a dielectric liner surrounding the whole volume of interest both with and without an air gap.

Source: Magnetic Resonance Imaging - December 23, 2017 Category: Radiology Authors: Atefeh Kordzadeh, Nicola De Zanche Source Type: research