MR Guided Focused Ultrasound (FUS) for the Treatment of Trigeminal Neuralgia

Patients' head will be placed in ExAblate device to hold it still for the treatment. The ExAblate Transcranial helmet will be placed on their head. The investigators will measure the study participant's heart, blood pressure, temperature, and breathing rate before the treatment begins. MRI scans will be taken to make sure the ultrasound waves will be aimed exactly within the target. A series of MR images will be taken to identify the target area, and plan the study treatment. The study investigators will decide on the area of participant's brain that will be treated. The ExAblate Transcranial system will compute a plan to cover the treatment area. This area is gradually heated while monitoring the patient's responses and neurologic examination.