loading
Documents

Research.Publish.Connect.

Paper

Paper Unlock

Authors: Karin Mörtlbauer ; Daniel Zemann and Erwin Hochmair

Affiliation: University of Innsbruck, Austria

ISBN: 978-989-8425-91-1

Keyword(s): VNA, GTEM cell, Transmission line, Scattering parameter, Medical-Implant, MRI.

Related Ontology Subjects/Areas/Topics: Bio-Electromagnetism ; Biomedical Engineering ; Biomedical Instruments and Devices ; Implantable Electronics

Abstract: RF induced currents in elongated electrodes of medical implants can cause hazardous tissue heating during MRI scans. In this paper we introduce an experimental setup to investigate the influence of the geometrical electrode design on the magnitude of the RF induced current. A Vector Network Analyser (VNA) was connected to a Gigahertz Transverse Electromagnetic (GTEM) cell containing the electrode under test. The forward power gain (S21 scattering parameter) was measured by the VNA, whereof the magnitude of the current at the electrode tip could be derived. Furthermore, calculations via transmission line theory were done to describe the present mechanism of current induction. These calculations show good agreement with the results of the performed measurements.

PDF ImageFull Text

Download
Sign In Guest: Register as new SciTePress user now for free.

Sign In SciTePress user: please login.

PDF ImageMy Papers

You are not signed in, therefore limits apply to your IP address 54.161.118.57

In the current month:
Recent papers: 100 available of 100 total
2+ years older papers: 200 available of 200 total

Paper citation in several formats:
Mörtlbauer, K.; Zemann, D. and Hochmair, E. (2012). APPLICATION OF A GTEM CELL TO DETERMINE RF INDUCED CURRENTS IN ELECTRODES OF MEDICAL IMPLANTS - An Alternative to Measurements in MRI Birdcages.In Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2012) ISBN 978-989-8425-91-1, pages 315-318. DOI: 10.5220/0003763103150318

@conference{biodevices12,
author={Karin Mörtlbauer. and Daniel Zemann. and Erwin Hochmair.},
title={APPLICATION OF A GTEM CELL TO DETERMINE RF INDUCED CURRENTS IN ELECTRODES OF MEDICAL IMPLANTS - An Alternative to Measurements in MRI Birdcages},
booktitle={Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2012)},
year={2012},
pages={315-318},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003763103150318},
isbn={978-989-8425-91-1},
}

TY - CONF

JO - Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2012)
TI - APPLICATION OF A GTEM CELL TO DETERMINE RF INDUCED CURRENTS IN ELECTRODES OF MEDICAL IMPLANTS - An Alternative to Measurements in MRI Birdcages
SN - 978-989-8425-91-1
AU - Mörtlbauer, K.
AU - Zemann, D.
AU - Hochmair, E.
PY - 2012
SP - 315
EP - 318
DO - 10.5220/0003763103150318

Login or register to post comments.

Comments on this Paper: Be the first to review this paper.