Baudouin Denis De Senneville1, Sbastien
Roujol1,
1Laboratory for Molecular
& Functional Imaging: From Physiology to Therapy, CNRS/University of
On-line MR-temperature monitoring during radio-frequency ablation of cardiac arrhythmias may improve the efficacy and safety of the treatment. Magnetic Resonance Imaging can provide rapid and quantitative thermometric measurements in addition to a detailed anatomical information. For this purpose, cardiac triggering and dynamic navigator-based slice tracking were combined with image registration and modeling of susceptibility changes with respiration, in order to investigate the precision of PRF thermometry during a RF ablation in-vivo on a sheep heart.