Abstract #4605

2D Imaging near Metallic Implants at 0.5T using High Time-Bandwidth Product RF pulses

Chad T Harris¹, Andrew T Curtis¹, Ian RO Connell², Philip J Beatty¹, Jeff A Stainsby¹, and Curtis N Wiens¹

¹Research and Development, Synaptive Medical, Toronto, ON, Canada, ²Physics and Astronomy, Western University, London, ON, Canada

There are several benefits to reducing the main magnetic field strength including a reduction of imaging artefacts near metallic implants and the ability to significantly increase the peak B1+ of the RF pulses due to the reduction in SAR penalty. This enables higher time-bandwidth product (TBP) for a given RF pulse duration. In this work, we utilized high TBP RF pulses on a high-efficiency transmit coil and a 0.5T MR system to reduce through-plane distortions caused by metallic implants. In addition to characterizing through-plane distortions, the impact of these pulses on in-plane distortions and SAR were also characterized.

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