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Abstract #4899

RF Safety Evaluation for Neonatal MRI at 3T

Shaihan J Malik 1 , Arian Beqiri 1 , Anthony N Price 1,2 , Jeff W Hand 1 , and Joseph V Hajnal 1,2

1 Division of Imaging Sciences and Biomedical Engineering, Kings College London, London, London, United Kingdom, 2 Centre for the Developing Brain, Kings College London, London, London, United Kingdom

Algorithms used by scanner manufacturers usually control SAR using adult based models. In this study whole body and 10 g local averaged SARs in a newborn neonate head- or heart-centred in a 127 MHz birdcage coil were predicted numerically. SARs were scaled to match the duty cycle used in a Philips 3T Achieva when run at body scanning and head scanning SAR limits, mimicking the scanner set-up process during automated power scaling when an adult subject is present. Results indicate that under these conditions, exposure of a neonate is conservative from a safety point of view.

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