Focused ultrasound (MRgFUS thalamotomy, capsulotomy, low-intensity)

Domain IX · Biomedical, neuro & digital · 2016 · USA

What it is

Focused ultrasound is not a psychotherapy. It is a device-based procedure delivered by a specialist neurosurgical/neurology team. Three different uses share the name, and a therapist must keep them apart:

Format

• Procedure day (single session, team-delivered). A head frame is fitted; the patient lies in the MRI scanner awake and responsive; energy is delivered in steps while the team checks tremor and side effects until tremor reduces.

Who practises it, and how they are trained or regulated

• EU/CE-mark, MHRA, Health Canada and other national statuses and the age range in the US labelling are not drawn on here; check the manufacturer's regulatory page or the treating centre. NHS England funding for essential tremor treatment from April 2021 appears only in page metadata, not in a guidance text.
• Version followed: US FDA approvals of the Exablate Neuro MR-guided focused ultrasound (MRgFUS) system as reported by the manufacturer and the Focused Ultrasound Foundation (2016–2025); NICE guidance on unilateral MRgFUS thalamotomy for treatment-resistant essential tremor (patient information, 20 June 2018); published research on investigational MRgFUS capsulotomy (Sunnybrook, Toronto) and low-intensity transcranial…
• Ablative MRgFUS capsulotomy for psychiatric disorders (investigational). A lesion in the internal capsule (the region named by the procedure) for highly treatment-refractory obsessive-compulsive disorder (OCD) and major depressive disorder (MDD), in research settings only. As of October 2026 the Focused Ultrasound Foundation states that focused ultrasound "is not approved by any regulatory bodies worldwide as a…

Questions to explore with your client

• What drew you to it, and what are you hoping it will change?
• Does it involve any substance, plant preparation, remedy or supplement? Has your doctor or prescriber been told, especially about any medication you take?
• Does it involve intense or unusual breathing? Have you been told about the medical conditions for which that is not advised?
• Is it a group, retreat or community? How do they respond if someone wants to leave or raises a concern?
• Does it use a device, heat, cold, water or a physical procedure? Has a medical professional checked that it is safe for you?
• Who runs it, and what training or registration do they hold?
• What actually happens in a session or meeting, and how often?
• What does it cost, and is there pressure to commit to more?
• How do you feel afterwards, in the hours and days that follow?
• Does it fit with, or clash with, the work we do here?

What practitioners of it watch for

• drop-out from follow-up (the commonest reason for drop-out in one study was distance).
• expecting the procedure to do all the work. Working: functional gains, not only scale scores.
• hopelessness after a "last resort" fails. Working: the client knows what to do and whom to call.
• "non-invasive" being heard as "reversible" or "risk-free". Working: the client can explain it back accurately.
• clients minimising symptoms to stay eligible. Working: a dated baseline exists in your notes and, with consent, with the team.

When to involve someone else

• New or worsening physical symptoms, or advice to stop or change prescribed medication: involve the client's doctor or prescriber.
• Signs of coercion, isolation from family and friends, escalating costs or secrecy: discuss openly and consider safeguarding.
• A crisis or thoughts of suicide: follow your crisis protocol. In the US, call or text 988; in the UK and Ireland, Samaritans on 116 123.

Drawn automatically from the guide's own sections. Stay curious: neither endorse nor dismiss what the client values, and check anything that matters against the full guide and its sources. Not medical advice.