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Abstract #4071

Development of a standard reference object for monitoring quality and reproducibility in dB/dt-heating tests for medical devices

Christine M. Tarapacki1, Jack Hendriks1, Krzysztof Wawrzyn1, William Bradfield Handler1, and Blaine A. Chronik1

1The xMR Labs, Department of Physics and Astronomy, Western University, London, ON, Canada

The intent of this study is to introduce and characterize a standard reference object for gradient-induced dB/dt heating studies. Key attributes of a standard reference object would be simplicity, sensitivity (large response to exposure conditions), and reproducibility. Various geometries, materials, and exposure conditions were studied, and the results indicate the temperature rise of a simple copper annulus can be used to verify all components of a dB/dt exposure and measurement system are functioning prior to a device test. The thermal response of a 5-cm diameter copper annulus was characterized as a function of frequency and dB/dt-amplitude, both in air and in tissue-mimicking gel.

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