MRgHIFU Safety Issue: Multi-Layer Protection Against Tissue-To-Air Interface Heating

Magalie Viallon¹, Sylvain Terraz¹, Thomas Goget¹, Lorena Petrusca¹, Denis Morel², Vincent Auboiroux¹, Christoph Becker¹, Patrick Gross³, Rares Salomir¹

MRgHIFU is a hybrid technology which aims to offer efficient and safe thermal ablation of targeted tumors or other pathological tissues, while preserving the normal surrounding structures unaltered. Theoretically MRgHIFU has no limitation on lesion size. The main challenge is to avoid near and far field heating. We demonstrate here that reflection at air-tissue interfaces in the far field is a problem and we evaluate an home-made multi-layer protection against tissue-to-air interface heating.