Non-invasive Gamma Knife offers hope for patients with tumors formerly considered inoperable and those considered high-risk for open surgical procedures due to illness or other conditions. Read More »

What to Expect

Contrary to its name, there is no knife in Gamma Knife®. No incisions are involved in this safe and effective procedure used for more than 30,000 patients every year. Read More »

Watch our new Gamma Knife for Essential Tremor Video »


Gamma Knife is a type of radiation therapy. This precise, single-dose stereotactic radiosurgery is used to treat many types of brain tumors and disorders. Its extreme accuracy helps protect healthy brain tissue.

Surrounding tissue receives very little radiation, resulting in low risk of side effects. Patients experience little discomfort; returning home the same day and resuming activities within a day or two. Treatment effectively slows or arrests lesions over just a few weeks or months. Learn More »

About Our Center

Medical CenterSouth Sound Gamma Knife, at St. Joseph Medical Center in Tacoma, WA is the only Gamma Knife facility located between Seattle, WA and Portland, OR. It offers patients throughout the region a specially designed facility, state-of-the-art technology, and an unparalleled multidisciplinary team of neurosurgeons, radiation oncologists, radiation physicists, nurses and support staff. Read More »