MRI Guided Focused Ultrasound Unit Named for Dr. Joseph Maroon

On June 27, 2025, Dr. Jorge Gonzalez-Martinez and his team performed the inaugural ultrasonically guided treatment for essential tremor in a patient at the new Joseph C. Maroon MD UPMC MRI Guided Focused Ultrasound Unit at Presbyterian hospital. Dr. Gonzalez-Martinez, Director of Stereotactic and Functional Neurosurgery at UPMC, discussed how focused ultrasound offers patients a noninvasive alternative to conventional treatment for such things as Parkinson’s disease, dystonia, essential tremor and, in the future, possible drug and alcohol addiction, mood disorders and more.

Dr. Robert Friedlander, Chair of Neurosurgery and Sandy Rader, CEO of Presbyterian and Shadyside Hospitals performed a ribbon cutting inaugurating the center. It is named after Dr. Maroon, Vice chairman and Heindl Scholar in Neuroscience at UPMC. Dr. Maroon is a long-time proponent and innovator in minimally invasive surgery of the brain , orbit and spine.


Focused ultrasound is a noninvasive therapeutic technology with the potential to transform the treatment of many medical disorders. It uses ultrasonic energy to target tissues deep in the body without incision or radiation. It combines magnetic resonance imaging (MRI) with ultrasound to identify and target specific areas of the brain to be treated in real time and immediately confirm the effectiveness of the treatment.

 The principle is analogous to using a magnifying glass to focus beams of sunlight on a single point to burn a hole in a leaf. With focused ultrasound an acoustic lens is used to concentrate multiple intersecting beams of ultrasound on to a single target deep in the brain with extreme precision and accuracy up to 1 – 1.5 mm in diameter or as large as 1 – 1.5 cm in diameter. The individual beams pass through the brain tissue with no effect. But at the focal point the convergence of the multiple beams results in many important biological effects creating the possibility of treating a variety of medical disorders. it is performed on an outpatient basis, requires no incisions with minimal discomfort, if any, to the patient and few, if any, complications.

The procedure itself takes approximately 45 minutes. There is often immediate improvement in symptoms that can be present for many years. Focused ultrasound represents a true paradigm shift in precision brain surgery without anesthesia or incision into the head or brain.