RF Injection Network Development for Testing of Active Implantable Medical Devices Exposed to RF Fields in 1.5 T MRI Systems

Authors

Ali Attaran, The University of Western Ontario
William B. Handler, The University of Western Ontario
Blaine A. Chronik, The University of Western OntarioFollow

Document Type

Article

Publication Date

3-1-2020

Journal

IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology

Volume

4

Issue

1

First Page

2

Last Page

9

URL with Digital Object Identifier

10.1109/JERM.2019.2909386

Abstract

© 2016 IEEE. This paper presents the design, construction, and testing of an RF injection network for MR-conditional medical testing of devices for use within 1.5 T MRI scanners (i.e., frequency of 63.4 MHz). The system was developed to meet the requirements of ISO/TS 10974:2018(E). A directional lumped element coupler, power splitter, an attenuator/isolator, low-pass filter, and high-pass filter were designed and implemented as part of the network. The RF injection network was developed in both a compact version implemented in a single PCB and discrete PCB version for use in different situations. The performance of each designed component was simulated and compared to measurement results. As an application example, a neuromodulation system was tested using the developed RF injection network for conductive emission testing.