Trial of MR-guided Focused Ultrasound (MRgFUS) Bilateral Capsulotomy for the Treatment of Refractory Obsessive-compulsive Disorder (OCD)

MR-guided Focused Ultrasound (MRgFUS) offers the possibility of lesioning deep brain targets, while obviating the need for open surgical approaches. There is no radiation, incision, or burr hole, and lesions are generated in real-time under MR image guidance. Intracranial FUS for other applications, essential tremor most notably, has been shown to be safe and effective, recently receiving Health Canada approval for this indication. The technology, methods and procedures used in this study are identical to those in essential tremor.