Meeting Banner
Abstract #0560

Real-Time Method for MR Thermometry and Treatment of Mobile Organs by MRgHIFU

MAGNA25Zarko Celicanin1, Vincent Auboiroux2, Oliver Bieri1, Francesco Santini1, Magalie Viallon2, Klaus Scheffler3, 4, Rares Salomir2

1Division of Radiological Physics, Department of Radiology and Nuclear Medicine, University of Basel Hospital, Basel, Switzerland; 2Radiology Department, University Hospitals of Geneva, Geneva, Switzerland; 3MRC Department, MPI for Biological Cybernetics, Tbingen, Germany; 4Dept. Neuroimaging and MR-Physics, University of Tbingen, Tbingen, Germany

High-intensity focused ultrasound (HIFU) is a promising new technique for noninvasive thermal therapy. Motion is a severe problem that prevents application of MRgHIFU system to the thermal treatment of abdominal region. We try to combine intra- and interscan motion compensation for stabilization of thermometry imaging, and simultaneous real-time MRgHIFU focal point steering. Our approach is different to the previously published method in the way respiratory motion is compensated and real-time HIFU focal point steering achieved. The navigator echo is used for both intra- and interscan motion compensation of thermometry imaging and real-time HIFU focal point adjustment.