What is Stereotactic Radiosurgery?
Stereotactic radiosurgery, also known as stereotactic radiotherapy (SRT), is a minimally invasive treatment for many tumors, abnormalities and functional disorders of the brain, head or upper neck. Although called radiosurgery, the procedure does not require a surgical incision. We call it surgery because stereotactic radiosurgery can have the same precision and result as open surgery, but with the advantages of a minimally invasive procedure.
What is Gamma Knife radiosurgery?
The Leksell Gamma Knife® is the gold standard for non-surgically treating many serious neurological disorders located in the head and neck, including:
- malignant tumors
- metastatic brain tumors
- benign brain tumors, including acoustic neuromas, meningiomas and pituitary tumors
- arteriovenous malformations
- trigeminal neuralgia
Is Gamma Knife radiosurgery the right treatment for my condition?
If you have a brain tumor or other lesion or disorder of the head or neck, the best person to determine if you are a good candidate for Gamma Knife® radiosurgery is a practicing neurosurgeon who uses the technology. In making a recommendation, the physician will consider the lesion type, size and location.
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Leksell Gamma Knife® PERFEXION™
The ultimate tool for stereotactic radiosurgery is now at Washington Hospital.
- A revolutionary alternative to traditional surgery and conventional radiosurgery - highly effective in treating conditions of the brain and head areas
- Performed by a world renowned team of physicians and other medical experts
- Fast, precise and comfortable - PERFEXION™ delivers on the promise of minimally invasive treatment.
Our Medical Directors
Sandeep Kunwar, M.D., Neurosurgeon
Co-Medical Director, Gamma Knife Program
Board certified in neurosurgery and renowned for his work in minimally invasive neurosurgery, Dr. Kunwar played an instrumental role in the evolution of the Taylor McAdam Bell Neuroscience Institute where he now serves as medical director for three of the Institute's programs.
David Larson, M.D., Ph.D, Radiation Oncologist
Co-Medical Director, Gamma Knife Program
Board certified in therapeutic radiology and recognized nationally and internationally for his work in stereotactic radiosurgery for the treatment of brain tumors, Dr. Larson serves as co-medical director of the Taylor McAdam Bell Neuroscience Institute's Gamma Knife® Program.
About Washington hospital
Washington Hospital, located in Fremont, California, was the first hospital in the United States to treat patients using the new Leksell Gamma Knife Perfexion™, a revolutionary alternative to traditional open-brain surgery and/or daily radiation treatments, which are administered from four to six weeks. The Gamma Knife Perfexion instead uses focused doses of radiation without making a single incision to treat malignant and benign brain tumors in a matter of hours.
Washington Hospital's Gamma Knife® Program is led by one of the most accomplished teams of specialized physicians, physicists and nurses. Medical Directors neurosurgeon Sandeep Kunwar, MD, and radiation oncologist David Larson, MD, PhD, are both nationally and internationally recognized for their expertise, innovation and leadership in the field of Gamma Knife radiosurgery. Both board certified physicians, together they have more than 23 years of experience performing thousands of successful procedures.


