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Abstract #4396

Online Phase-Collection Based Correction of MR Thermometry for Breast HIFU Ablation: Evaluation Under Various Respiratory Motion Susceptibility Conditions in Phantom.

Matthieu Lepetit-Coiffe1, Baudouin Denis de Senneville1, Philippe Lourenco de Oliveira1, Charles Mougenot1, Bruno Quesson1, Jean Palussiere1, Chrit Moonen1

1Laboratoire IMF CNRS UMR 5231 / Universite Bordeaux 2, Bordeaux, France, Metropolitan

An online phase-atlas based correction was evaluated regarding temperature accuracy improvement under various frequency and amplitude of respiratory motion conditions simulated thanks to a home made phantom. Fixed acoustic power and duration of High Intensity Focused Ultrasound (HIFU) was delivered during real time MR temperature acquisition in the respiratory mimicking phantom; Temperature maps were corrected with the proposed correction and results compared to temperature maps acquired under same HIFU delivery conditions without any perturbations.