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Evaluation of an optical electric field sensor for measurement of specific absorption rate (SAR) during magnetic resonance imaging.

Loader, B G; Gregory, A P; Bownds, D; Seifert, F* (2012) Evaluation of an optical electric field sensor for measurement of specific absorption rate (SAR) during magnetic resonance imaging. In: International symposium on Electromagnetic Compatibility (EMC EUROPE 2012), 17-21 September 2012, Rome, Italy.

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Abstract

This paper examines the measurement of the specific absorption rate (SAR) of radio frequency energy during magnetic resonance imaging using an optical electric field sensor (OEFS). The sensor was used to measure SAR in a simple phantom during a 3-Tesla MRI scan and the results compared to computer simulations and also those obtained through temperature measurements. A reasonable level of agreement is demonstrated. The optical electric field sensor has much higher sensitivity for SAR measurement than the thermometers and the measurements are much quicker. The application of this technology should allow the spatial distributions of SAR within phantoms during MRI to be measured.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Keywords: MRI, SAR, magnetic resonance imaging
Subjects: Electromagnetics
Electromagnetics > RF and Microwave
Identification number/DOI: 10.1109/EMCEurope.2012.6396819
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5741

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