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Abstract #1814

Optimization of a Four-Coil Array Arrangement for Brain Therapy by MR-Guided Transcranial Focused Ultrasounds

Line Souris1, Najat Salameh1, Matthias Korn1, Laurent Marsac2, Jean-Franois Aubry3, Mathieu Pernot3, Mickael Tanter3, Luc Darrasse1

1Imagerie par Rsonance Magntique Mdicale et MultiModalit (UMR 8081), Universit Paris-Sud, CNRS, Orsay, France; 2SuperSonic Imagine, Aix en Provence, France; 3Institut Langevin, ESPCI ParisTech, CNRS UMR 7587, INSERM U979, Paris, France

MRI is a well-suited candidate for temperature monitoring during the heating with transcranial HIFU. For this application, the body coil is usually used because of the constraints due to the large sized of the HIFU system and the stereotactic frame surrounding the patient head. This study showed the improvement of image quality, and therefore temperature sensitivity, by using a dual Flex-coil arrangement. Further improvement is possible by designing dedicated coil arrays with a larger number of coil elements and integrated EMI filters within the coil architecture to reject any interference of the HIFU shots with the MR signal.