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ME/CFSCerebral PalsyParkinson'sLong CovidMultiple SclerosisMCASCystic FibrosisStrokeEpilepsyEndometriosisMigraineALSLupus
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Most popular ways to manage stiffness, pain, and rigidity in Parkinson'sBest treatments to boost energy and motivation in Parkinson's10 non-medication based treatments for Parkinson's
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Parkinson's/Treatments/High-intensity Focused Ultrasound (HiFU)
High-intensity Focused Ultrasound (HiFU)
Technologies & EquipmentSurgery

High-intensity Focused Ultrasound (HiFU)

What is it: Noninvasive, MRI-guided procedure using focused ultrasound to interrupt faulty brain circuits.AKA: Focused Ultrasound, FUS HIFU, HiFU
Researched
Quantity and depth of existing academic research
  1. ⬤ Minimal research: Very little scientific study exists, with no or very few peer-reviewed studies. Insufficient data for conclusions.
  2. ⬤⬤ Limited research: Few studies exist, mostly small trials or case reports. Findings are preliminary and lack strong validation.
  3. ⬤⬤⬤ Moderately researched: Multiple studies, including mid-sized trials, exist. Some findings are replicated, but more research is needed.
  4. ⬤⬤⬤⬤ Well-researched: Supported by substantial evidence, including at least one large trial or meta-analysis.
  5. ⬤⬤⬤⬤⬤ Extensively studied: Numerous large studies and meta-analyses exist. Findings are widely accepted with strong scientific consensus.
 
Ease of access
How easy it is for the average patient to access this treatment
  1. ⬤ Extremely Difficult to Access: Rare, experimental, or highly specialized. Requires multiple referrals, long wait times, travel, and strict follow-up.
  2. ⬤⬤ Difficult to Access: Limited to select centers with moderate barriers. Requires referral, potential travel, and wait times of weeks to months.
  3. ⬤⬤⬤ Moderately Accessible: Available in larger hospitals or clinics. Requires a basic referral, with moderate wait times and some coordination.
  4. ⬤⬤⬤⬤ Easy to Access: Widely available in most clinics. Minimal referral, short wait times, and simple preparation or follow-up.
  5. ⬤⬤⬤⬤⬤ Trivial to Access: Easily found in pharmacies or clinics. No referral needed, minimal wait, and straightforward access.
 
Cost
How much in USD does it approximately cost for a patient to see the benefits of this treatment.
  1. ⬤ Up to $100
  2. ⬤⬤ Up to $500
  3. ⬤⬤⬤ Up to $2000
  4. ⬤⬤⬤⬤ Up to $10,000
  5. ⬤⬤⬤⬤⬤ More than $10,000
 
Reported effectiveness
The average perceived effectiveness of the treatment amongst the patient views found for this page.

To calculate the reported effectiveness for a patient view, the model first analyses whether it can be ascertained that the person writing the review has had direct experience of the treatment for themselves or a loved one. If so, it then uses sentiment analysis to rate their view from 1-5 on how effective this treatment was for them, with 1 being the least effective, and 5 the most effective.

 
Best suited for: Advanced-stage patients; Medication-resistant patients; Tremor-dominant patients
last updatedTue, 07 Oct 2025
curated byTurnto community

16 Resources

Referenced in this guide

50 Research papers

Referenced in this guide

16 Expert views

Contributed in this guide

40 Patient views

Contributed in this guide

Figure out what High-intensity Focused Ultrasound (HiFU) means for you

Page contents

Basics: What you need to know

MR-guided High-Intensity Focused Ultrasound is a precise neurosurgical procedure for individuals with stubborn motor symptoms. It employs real-time MRI to direct high-energy ultrasound beams at specific deep brain areas linked to tremors, creating a heat-induced lesion that can reduce or eliminate those symptoms. This approach dates back to the early experiments with focused ultrasound technology but has recently been refined through advanced imaging techniques and device improvements. With no scalp incision or implanted hardware, it offers a minimally invasive alternative that may benefit patients who have not responded to medications or want an option other than deep brain stimulation.

History and development

  • Mid-1900s origins: Medical interest in ultrasound-based therapies arose in the mid-1900s, with pioneering work exploring how focused sound waves could be harnessed to treat neurological disorders without open surgery.
  • Early breakthroughs: In the 1950s, researchers discovered that focusing ultrasound could generate enough heat to disrupt targeted tissues, leading to controlled lesions. This idea gained traction as a potential non-invasive neurosurgical solution.
  • Collaboration and refining: By the early 2000s, key experts like Dr. Kullervo Hynynen refined transducer designs, while partnerships with technology firms, including Insightec, spurred the creation of MRI-compatible hardware.
  • Regulatory green light: The technique saw its first major approval for essential tremor in 2016 following successful clinical trials led by Dr. Jeffrey Elias. Subsequent approvals expanded its use, garnering attention for Parkinson’s-related tremor relief.

What is known

  • Reliable tremor control: Clinical trials report significant tremor reduction in many patients, often observed immediately after the procedure, with benefits that can persist for years.
  • MRI precision: Real-time imaging confirms the targeted area during ablation, minimizing damage to surrounding tissues and allowing immediate assessment of clinical effects.
  • Lesser-known benefits: Besides tremor suppression, some patients cite enhanced fine motor control and better daily task performance, potentially reducing reliance on medications.
  • Non-invasive advantage: No surgical incision is required, unlike other neurosurgical options. This aspect often translates to shorter recovery times and lower infection risk.

What is not known

  • Long-term durability: Although early outcomes are promising, data about symptom control beyond five years remain limited, leaving future effectiveness uncertain.
  • Impact on progression: It is unclear whether precision ablation influences the fundamental disease progression, as most findings focus on tremor control rather than broader neurological decline.
  • Optimal targeting: Researchers are still refining which specific brain regions yield the best results, as patient-specific variations may demand individualized approaches.
  • Full safety profile: While serious complications appear rare, the complete spectrum of adverse effects, especially for bilateral or repeated treatments, has yet to be fully established.
  • Thermal ablation: High-intensity sound waves converge on a small region, heating and destroying diseased tissue.
  • Real-time MRI: Continuous imaging ensures the beam is accurately aimed, while doctors monitor lesion creation for immediate results.
  • Incremental passes: Clinicians progressively increase ultrasound energy, checking symptom changes and adjusting beam position as needed.
  • Precision targeting: Confined energy patterns minimize thermal spread, reducing collateral damage to healthy brain areas.
  • Headache or dizziness: Mild discomfort often occurs during or shortly after treatment.
  • Numbness or tingling: Sensory changes can arise if heat affects nearby nerve pathways.
  • Speech difficulties: Rare complications include temporary or prolonged changes in speech clarity.
  • Balance or gait issues: Unintended lesioning can influence coordination, though these cases tend to be uncommon.
  • Accessibility challenges: The specialized equipment needed is available only in select treatment centers, limiting broader adoption.
  • Cost concerns: Some argue that the procedure’s expense may outweigh gains, especially when data on long-term outcomes remain limited.
  • Comparative efficacy: Debates persist over whether this approach is more beneficial or less risky than deep brain stimulation.
  • Ethical considerations: Some experts express caution about ablative methods that permanently alter brain structures, advocating for more reversible options.

Patient views

Experiences

  • Patients appreciate the non-invasive nature of HiFU.
  • Many report significant reduction in tremors and rigidity.
  • Improved quality of life is a common outcome.
  • Some regained motor functions, like eating and walking.

Challenges

  • HiFU is irreversible, creating permanent brain lesions.
  • Limited to treating one side of the body.
  • Side effects and risks of targeting errors exist.
  • Some prefer DBS for its adjustability and reversibility.

Tips

  • Research thoroughly and consult specialists before deciding.
  • Consider HiFU if ineligible for DBS.
  • Be aware of the permanence of HiFU outcomes.
  • Join support groups for shared experiences and advice.
Reported effectiveness
The average perceived effectiveness of the treatment amongst the patient views found for this page.

To calculate the reported effectiveness for a patient view, the model first analyses whether it can be ascertained that the person writing the review has had direct experience of the treatment for themselves or a loved one. If so, it then uses sentiment analysis to rate their view from 1-5 on how effective this treatment was for them, with 1 being the least effective, and 5 the most effective.

 

Sorted by relevancy

Patient view

I have performed a MRIgPTT FUS in Switzerland, treating the right brain hemisphere, so being the left body side treated, at the time my worst side, 3 and half years ago, after 13 years of PD, and it was one of my best choices in life. Most symptoms on the treated just vanished, like tremors, dyskinesias, distonia, neck pain, although they are evoluting now on my untreated side, I am way better than before the surgery.

August 2024 • Turnto Consumer Review

Patient view

The patient had Focused Ultrasound treatment done in July this year for their dominant Right hand. It gave them the use of their hand back and they would highly recommend it.

November +54672 • Parkinsons News Today

Read all (40)

Expert views

What they liked

  • Experts appreciate HiFU's non-invasive nature; no surgery needed.
  • Immediate effects seen in tremor reduction during procedures.
  • HiFU avoids risks like infection or hemorrhage from surgical interventions.
  • One-time treatment; no need for ongoing device maintenance.

What they didn't like

  • Permanent brain lesions; irreversible once performed.
  • Less accurate than DBS; risks of targeting wrong brain areas.
  • Potential side effects like speech or motor issues if lesion is too large.
  • Limited to certain symptoms; not effective for all Parkinson's cases.

What are they unsure about

  • Long-term effectiveness for Parkinson's symptoms remains unclear.
  • Uncertainty about safety of bilateral brain lesions.
  • Questions about optimal brain targets for HiFU treatment.
  • Lack of comparison studies with other treatments like DBS.

16 expert views

Sorted by relevancy

Expert view

High-intensity Focused Ultrasound (HiFU) is a non-surgical treatment for Parkinson's that creates precise lesions in the brain to address symptoms like tremor, rigidity, and slowness. Unlike Deep Brain Stimulation (DBS), HiFU does not involve surgery, avoiding risks like infection or brain damage. It also has advantages over radiation-based treatments, as its effects are immediate and can be tested during the procedure. However, HiFU is irreversible, unlike DBS, which can be adjusted or turned off. While DBS remains the gold standard, HiFU could be a promising option for patients who cannot or do not want to undergo surgery. Clinical trials are ongoing to determine its effectiveness for different Parkinson's symptoms.

December 2015 • Webinar: "Treating the Brain" March 2015

Expert view

Dr. Michael Okun discusses the use of High-intensity Focused Ultrasound (HiFU) for Parkinson's disease, emphasizing its role in treating tremors, dyskinesia, and on-off fluctuations. He notes that HiFU is typically used for one-sided therapy, as creating lesions in the brain can lead to irreversible changes. While HiFU has fewer side effects compared to other treatments like Deep Brain Stimulation (DBS), its accuracy is lower because it operates externally and doesn't involve direct brain mapping. Dr. Okun highlights the need for further studies to determine the best targets and patient profiles for HiFU, as current outcomes are less favorable compared to traditional surgical methods. He also mentions advancements in DBS technology, which allow for real-time brain signal sensing and improved precision.

September 2023 • The Parkinson's Podcast: 2023 Emerging Therapies & Parkinson's

Read all (16)

What and who it targets

Best suited for

Advanced-stage patients

Non-invasive option for severe symptoms.

Medication-resistant patients

Alternative for those unresponsive to drugs.

Tremor-dominant patients

Effective for severe tremor control.


Relevant research

How much evidence on this?

  • Numerous studies since 2014; consistent findings across trials.

Research focusing on

  • Improves tremor, rigidity, bradykinesia; mild transient side effects.

What needs more research?

Long-term effects of bilateral lesions unclear.

Level of research
Quantity and depth of existing academic research
  1. ⬤ Minimal research: Very little scientific study exists, with no or very few peer-reviewed studies. Insufficient data for conclusions.
  2. ⬤⬤ Limited research: Few studies exist, mostly small trials or case reports. Findings are preliminary and lack strong validation.
  3. ⬤⬤⬤ Moderately researched: Multiple studies, including mid-sized trials, exist. Some findings are replicated, but more research is needed.
  4. ⬤⬤⬤⬤ Well-researched: Supported by substantial evidence, including at least one large trial or meta-analysis.
  5. ⬤⬤⬤⬤⬤ Extensively studied: Numerous large studies and meta-analyses exist. Findings are widely accepted with strong scientific consensus.
 

Sorted by relevancy

Research

This paper investigated the use of MR-guided focused ultrasound (HiFU) as a minimally invasive surgical treatment for Parkinson's disease (PD). It focused on targeting specific brain areas, such as the ventral intermediate nucleus, subthalamic nucleus (STN), and internal globus pallidus, to alleviate symptoms like tremor, rigidity, and akinesia.

The study found that 62% of patients treated with HiFU thalamotomy showed significant improvement in tremor scores three months after treatment, compared to 22% in the sham group. Open-label trials also reported improvements in rigidity (71%), akinesia (36%), and tremor (77%) six months post-treatment, as well as reductions in dyskinesia and motor scores by up to 52% and 45%, respectively.

For people with Parkinson's, this research suggests that HiFU could be a promising option for managing symptoms like tremor and rigidity without the risks of traditional surgery. It also highlights the potential for personalized treatment by targeting specific brain areas based on individual symptoms.

The study is reliable as it includes a double-blinded, sham-controlled randomized trial, which is a high standard in clinical research. However, more high-quality trials are needed to confirm long-term safety, efficacy, and optimal use of HiFU in Parkinson's treatment.

July 2019 • Movement disorders : official journal of the Movement Disorder Society

Research

This paper systematically reviewed and analyzed the safety and effectiveness of unilateral focused ultrasound (FUS) pallidotomy for treating motor complications in Parkinson's disease (PD). The researchers examined data from five studies involving 112 PD patients, using tools like the Unified Parkinson's Disease Rating Scale (UPDRS) to measure outcomes.

The study found significant improvements in motor symptoms, as shown by reductions in UPDRS-II, UPDRS-III, UPDRS-IV, and UDysRS scores. Additionally, the treatment was deemed safe, with no statistically significant increase in adverse events such as headaches or walking difficulties.

For people with Parkinson's disease, this research suggests that FUS pallidotomy could be a promising option to improve motor symptoms without introducing significant safety risks. It provides hope for better management of motor complications in PD.

As a systematic review and meta-analysis, this study is highly reliable due to its comprehensive approach and inclusion of multiple studies. Published in a reputable journal, it offers strong evidence for the safety and efficacy of FUS pallidotomy in PD treatment.

June 2024 • Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology


Accessibility

Ease of access
How easy it is for the average patient to access this treatment
  1. ⬤ Extremely Difficult to Access: Rare, experimental, or highly specialized. Requires multiple referrals, long wait times, travel, and strict follow-up.
  2. ⬤⬤ Difficult to Access: Limited to select centers with moderate barriers. Requires referral, potential travel, and wait times of weeks to months.
  3. ⬤⬤⬤ Moderately Accessible: Available in larger hospitals or clinics. Requires a basic referral, with moderate wait times and some coordination.
  4. ⬤⬤⬤⬤ Easy to Access: Widely available in most clinics. Minimal referral, short wait times, and simple preparation or follow-up.
  5. ⬤⬤⬤⬤⬤ Trivial to Access: Easily found in pharmacies or clinics. No referral needed, minimal wait, and straightforward access.
 
Cost
How much in USD does it approximately cost for a patient to see the benefits of this treatment.
  1. ⬤ Up to $100
  2. ⬤⬤ Up to $500
  3. ⬤⬤⬤ Up to $2000
  4. ⬤⬤⬤⬤ Up to $10,000
  5. ⬤⬤⬤⬤⬤ More than $10,000
 

Method to access

  • Available at specialized centers offering HiFU for tremor-dominant Parkinson's Disease.
  • Requires eligibility assessment, including prior medication trials and imaging tests.
  • Appointments can be booked directly with centers offering the procedure.
  • Virtual consultations may be available at some locations.

Cost

  • Costs range from $10,000 to $15,000 per procedure in the US.
  • In Canada, costs are approximately CAD $14,831.
  • Prices may vary based on location and insurance coverage.

Insurance cover

  • Commonly covered by Medicare in the US for tremor-dominant Parkinson's Disease.
  • Increasing coverage by private insurers in the US.
  • Coverage varies by region; patients should confirm with their provider.

Locations

  • Cleveland Clinic, Ohio, US: Offers HiFU for tremor-dominant Parkinson's Disease.
  • Regional One Health, Tennessee, US: Provides HiFU treatment for eligible patients.
  • Clínica Universidad de Navarra, Spain: Specializes in HiFU for Parkinson's tremors.
  • Focused Ultrasound Foundation: Lists global treatment sites for HiFU.

Related clinical trials

MR-guided Focused Ultrasound Plus GCase
Clinical trial
Canada

MR-guided Focused Ultrasound Plus GCase

InSightec
Learn more
Using Low Intensity Focused Ultrasound to Modulate Deep Brain Areas for Tremor Control in Parkinson's Disease Patients.
Clinical trial
Canada

Using Low Intensity Focused Ultrasound to Modulate Deep Brain Areas for Tremor Control in Parkinson's Disease Patients.

University of British Columbia
Learn more
A Post-Approval Registry for Exablate 4000 Type 1.0 and Type 1.1 for Unilateral Pallidotomy for the Treatment of Advanced, Idiopathic Parkinson's Disease With Medication-refractory Moderate to Severe Motor Complications
Clinical trial
Multiple countries

A Post-Approval Registry for Exablate 4000 Type 1.0 and Type 1.1 for Unilateral Pallidotomy for the Treatment of Advanced, Idiopathic Parkinson's Disease With Medication-refractory Moderate to Severe Motor Complications

InSightec
Learn more

Frequently asked questions

HiFU is generally non-invasive and painless, but some patients may experience mild discomfort during the procedure.
Recovery is typically quick, with most patients resuming normal activities within a day or two.
Long-term effects are generally positive, with sustained tremor relief, but ongoing monitoring is recommended.
HiFU is most effective for tremor-dominant Parkinson's and less so for other types.

Key resources

Webinar: "Treating the Brain" March 2015

Webinar: "Treating the Brain" March 2015
Learn more

The Parkinson's Podcast: 2023 Emerging Therapies & Parkinson's

The Parkinson's Podcast: 2023 Emerging Therapies & Parkinson's
Learn more

Webinar: "Deep Brain Stimulation and Focused Ultrasound for Parkinson's" February 2019

Webinar: "Deep Brain Stimulation and Focused Ultrasound for Parkinson's" February 2019
Learn more

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