MRI-Guided Focused Ultrasound in Parkinson's Disease and Essential Tremor: Incisionless but Invasive. A Narrative Review.

Magnetic resonance-guided focused ultrasound (MRgFUS) is an emerging and promising technology for treating movement disorders, such as essential tremors and tremor-dominant Parkinson's disease. MRgFUS utilizes advanced ultrasound transducer emitters to condense sound waves at a precisely defined point. This technology can target various brain areas, such as the pallidothalamic tract, thalamus, and pallidum, to ameliorate some of the symptoms of Parkinson's disease and other movement disorders, such as dystonic and action-induced tremors. We review the current status of preclinical and clinical trials on the clinical use, treatment outcomes, and indications of MRgFUS.