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BioMedical Engineering OnLine

, 1:2

First Online: 12 September 2002Received: 10 July 2002Accepted: 12 September 2002

Abstract

According to manufacturers of both magnetic resonance imaging MRI machines, and implantable neurological pulse generators IPGs, MRI is contraindicated for patients with IPGs. A major argument for this restriction is the risk to induce heat in the leads due to the electromagnetic field, which could be dangerous for the surrounding brain parenchyma. The temperature change on the surface of the case of an ITREL-III Medtronic Inc., Minneapolis, MN and the lead tip during MRI was determined. An anatomical realistic and a cubic phantom, filled with phantom material mimicking human tissue, and a typical lead configuration were used to imitate a patient who carries an IPG for deep brain stimulation. The measurements were performed in a 1.5 T and a 3.0 T MRI. 2.1°C temperature increases at the lead tip uncovered the lead tip as the most critical part concerning heating problems in IPGs. Temperature increases in other locations were low compared to the one at the lead tip. The measured temperature increase of 2.1°C can not be considered as harmful to the patient. Comparison with the results of other studies revealed the avoidance of loops as a practical method to reduce heating during MRI procedures.

Electronic supplementary materialThe online version of this article doi:10.1186-1475-925X-1-2 contains supplementary material, which is available to authorized users.

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Autor: Wolfgang Kainz - Georg Neubauer - Richard Überbacher - François Alesch - Dulciana Dias Chan

Fuente: https://link.springer.com/



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