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Abstract #1361

A Numerical Study Comparing Adult Body, Head and Knee Coils for Paediatric MRI

Gemma R Cook 1 , Martin J Graves 1 , Owen J Arthurs 2 , Fraser J Robb 3 , and David J Lomas 1

1 Radiology, University of Cambridge, Cambridge, United Kingdom, 2 Great Ormond Street Hospital, London, United Kingdom, 3 GE Healthcare Coils, Aurora, OH, United States

Limited availability of dedicated paediatric coils means MRI is typically performed using a transmit/receive coil (considered to be more SAR and SNR advantageous). This study uses a FEM-compatible model of a two month infant inside birdcage coils of typical body, head and knee coil sizes. Transmit and receive fields were calculated and the Specific Absorption Rate (normalised to 4W/kg) was calculated for 1cm cubes. SAR maps determined the heat source for further temperature change simulations and maximal SAR and temperature change positions were compared to determine the advantages of each coil.

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