Feasibility of MR-Thermometry with Blood Suppression on the Human Heart at 3T

Silke Hey¹, Alexandru Cernicanu², Baudouin Denis de Senneville¹, Sebastien Roujol¹, Mario Ries¹, Chrit T. W. Moonen¹, Bruno Quesson¹

Ventricular tachycardia and atrial fibrillation can be treated by catheter radio-frequency ablation where PRFS-based MR thermometry is a candidate to provide intra-procedural feedback. However, MR thermometry of the heart is challenging. As blood suppression is preferable to avoid artifacts in the myocardium, we explore three different options, namely double inversion recovery (DIR), motion-sensitized driven equilibrium (MSDE), and inflow saturation (IS). The effectiveness of the blood suppression and its effect on the temperature stability in the septum is evaluated in eight healthy volunteers for 50s of free-breathing using VCG cardiac triggering and navigator respiratory compensation.