What Happens During an MRgFUS Procedure?

Pre‑Procedure Preparation

Before the procedure begins, patients undergo detailed MRI imaging and clinical evaluation to map the exact target and plan the treatment strategy. A stereotactic frame or fixation device is often positioned on the patient’s head to ensure immobility.

Patient State During Treatment

Patients remain awake during most of the MRgFUS procedure, which takes place inside an MRI scanner. The cold water‑filled helmet stabilizes the head and maintains comfort while thousands of ultrasound waves are focused on the target area inside the brain.

The neurosurgical team monitors the patient’s responses and MRI data continuously. At specific intervals, brief bursts of focused ultrasound energy are delivered to raise tissue temperature and ablate nerve pathways responsible for symptoms such as tremor.

Real‑Time Interaction and Safety

During sonication (ultrasound application), clinicians may ask the patient to perform simple tasks to gauge symptom response—for example, holding hands outstretched to assess tremor reduction.

This real‑time feedback ensures the treatment effect is optimized while maintaining safety.

Post‑Procedure Care

After treatment, the fixation device is removed, and the patient is taken to a recovery area. Most individuals will have minor scalp discomfort from the fixation points but no major surgical wounds.

Observation in the clinic for a few hours or overnight may be recommended, but many patients return home soon after the procedure.

Understanding the MRgFUS procedure helps reduce anxiety and sets realistic expectations for people considering this functional neurosurgery option in Bern and Ostermundigen, Switzerland.