Safe MR scanning of patients with metallic middle ear implants

Wild, D.C., Head, K. and Hall, D.A., 2006. Safe MR scanning of patients with metallic middle ear implants. Metallic otological implants [running title], 31 (6), pp. 508-510.

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Objective: To determine the MR scanning risk to patients with otologic implants. Design: We used a repeated-measures study with an additional control measure to assess two aspects of risk; i) movement of the device in the magnetic field, and ii) absorption of energy leading to local heating. We used an ex vivo test method that met with international standards. We measured the effects in a Philips Intera Achieva 3 Tesla MR scanner using a Sense Head 8 channel RF coil. Setting: University based magnetic resonance research facility Main outcome measures: Heating or displacement of the stapedectomy pistons Results: No evidence of displacement or heating was found. Conclusion: Complying with the ex vivo standard testing protocols, the Schuknecht and McGee wire pistons, (device product numbers 140106 and 140108 respectively) were found to be safe in a 3 T MR scanner. These conclusions can be extrapolated to the in vivo case.

Item Type: Journal article
Description: The definitive version is available at
Publication Title: Metallic otological implants [running title]
Creators: Wild, D.C., Head, K. and Hall, D.A.
Publisher: Blackwell Publishing
Date: 2006
Volume: 31
Number: 6
Rights: © 2006 Blackwell Publishing Ltd.
Divisions: Schools > School of Social Sciences
Record created by: EPrints Services
Date Added: 09 Oct 2015 11:04
Last Modified: 23 Aug 2016 09:13

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