First experience with MR-guided focused ultrasound in the treatment of Parkinson’s disease

Radiofrequency (RF) subthalamotomies have been proposed since the 1960s to treat patients suffering from Parkinson’s disease (PD). Recently, the magnetic resonance (MR)-guided focused ultrasound technology (MRgFUS) offers the possibility to perform subthalamic thermocoagulations with reduced risks and optimized accuracy. We describe here the initial results of the MRgFUS pallidothalamic tractotomy (PTT), an anatomical and physiological update of the earlier subthalamotomies.