A New Medical Implant Lead for 1.5 T, 3 T, and 7 T MRI Systems

Das, R. and Yoo, H. (2017) A New Medical Implant Lead for 1.5 T, 3 T, and 7 T MRI Systems. In: 2017 IEEE Antennas and Propagation Society International Symposium, San Diego, CA, USA, 9-14 July 2017, pp. 1009-1010. ISBN 9781538608982 (doi: 10.1109/APUSNCURSINRSM.2017.8072547)

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In the presence of an electrically conducting medical lead, Radio Frequency (RF) coils in Magnetic Resonance Imaging (MRI) systems may concentrate the RF energy and cause tissue heating near the lead. Here, we present a novel design for a medical lead to reduce this heating by introducing pins. A pin can be taught as an electrical short that connect the main lead to the surrounding tissues. Initially, detail analysis of our proposed design is carried out by using Ansoft HFSS. Then, peak 10 g Specific Absorption Rate (SAR) in heart tissue, an indicator of heating, was calculated and compared for both conventional design and our proposed design. Remcom XFdtd software was used to calculate the peak SAR distribution in a realistic model of the human body. The model contained a medical lead that was exposed to RF magnetic fields at 64 MHz (1.5 T), 128 MHz (3 T) and 300 MHz (7 T) using a model of an MR birdcage body coil. We demonstrate that our proposed design of adding pins to the medical lead can significantly reduce the heating from different MRI systems.

Item Type:Conference Proceedings
Additional Information:Funding: National Research Foundation of Korea (NRF): 2016R1D1A1A09918140.
Glasgow Author(s) Enlighten ID:Das, Dr Rupam
Authors: Das, R., and Yoo, H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering

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