New hope for those with essential tremor and Parkinson’s

Imagine you can’t write your loved one a birthday card, sign your own name, or even lift a cup of water or bite of food to your mouth without spilling. While we take these everyday actions for granted, those who live with Parkinson's disease and essential tremor disease know that the uncontrollable shaking caused by these conditions can make otherwise routine tasks difficult or even impossible.

Fortunately, for patients whose shaking cannot be controlled with medicine, Sharp Grossmont Hospital for Neuroscience offers a ground-breaking technology called MR-guided focused ultrasound to treat tremors caused by Parkinson’s and essential tremor — two conditions also known as movement disorders.

Sharp Grossmont is proud to be the only provider in San Diego County to offer this groundbreaking treatment for movement disorders, which has shown to greatly improve a patient’s quality of life.

Some key benefits of focused ultrasound include:

• A one-time outpatient procedure, usually lasting between 90 minutes to 2 hours, including prep time and post-procedure activities, after which patients can normally go home the same day

• Safe and minimally-invasive, with no incision — providing a low risk of infection

• No anesthesia involved

• Improvements usually seen immediately

How does it work?

MR-guided focused ultrasound uses ultrasound waves, guided by magnetic resonance imaging (MRI) to pinpoint the specific part of the brain that is causing the tremor and treat it. The procedure is performed inside of an MRI scanner, and the patient is awake the entire time. The precision of MRI technology allows the neurosurgeon to see exactly where the treatment is going, targeting the affected areas of the brain causing tremors.

“We use ultrasound waves that pass through cool water, which circulates in a helmet around your head, then painlessly and safely to the center of your brain,” says Dr. Vamsi Chavakula, director of functional neurosurgery at Sharp Grossmont Hospital for Neuroscience and the neurosurgeon who performs the procedure. “A small amount of energy generates enough heat to make a pea-sized lesion on your brain, which disrupts the abnormal circuit causing your tremor without damaging the surrounding healthy tissue.”

A joint effort between doctor and patient

Dr. Chavakula says being able to control how the procedure is progressing and communicate with the patient in real time is one of the best parts of the technology.

“I can stay in touch with the patient and by communicating with them, evaluate if their tremor is improving in the midst of performing the procedure,” says Dr. Chavakula. “In reality, the patient is helping me help them.”

The often immediate improvement is one of the biggest benefits of focused ultrasound. Patients perform a drawing test before and after the treatment. What may have been a squiggly mess drawn beforehand can often be seen as a nearly straight line after just the first application of energy or by the end of the treatment. Dr. Chavakula says some of his patients haven’t seen their own handwriting in more than 20 years and realize they’ll have many other parts of their life back too.

“They’re excited because for the first time in years, they can go to dinner and out to social settings and not be afraid of spilling cups of water or dropping their food," he says. "It’s often an overwhelming and emotional experience for them.”

Who is a candidate for MR-guided focused ultrasound?

If you have been diagnosed with tremor-dominant Parkinson’s disease or essential tremor-focused ultrasound technology may be the answer to controlling your tremors. Other requirements can include:

• Your tremor cannot be controlled with medication, or you can’t control the medication’s side effects.

• Basic tasks, such as eating, writing or getting dressed, have become difficult.

• Your health is generally good, and you have no serious conditions, such as heart or lung disease.

• You have no conditions or implants that prevent you from being inside an MRI scanner.

• You can remain still for the entire procedure.

Celebrating a milestone

The focused ultrasound team celebrated its 100th patient and procedure at the end of 2025, since it first began offering the technology in 2023.

“I think it’s a testament to our program that we reached our 100th patient, and reached it quite quickly,” says Dr. Chavakula.

“We know that there are conditions like Parkinson’s and essential tremor that we can treat, that for many years were silent illnesses that people had to live with. It’s fantastic to know we can provide these valuable procedures to help change the lives of our patients.”

Watch the above video to learn more about MR-guided focused ultrasound.

Learn more about focused ultrasound and deep brain stimulation during Dr. Chavakula's upcoming free webinar, Advanced Treatments for Essential Tremor and Parkinson's Disease, on Wednesday, May 13, from 6 to 7:30 pm.