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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