The fact is, the Gamma Knife is not really a knife at all, but a non-invasive tool that replaces the scalpel with a focused array of 192 intersecting beams of high-intensity gamma radiation. Hoag Memorial Hospital is one of the first in the nation to have the absolute state-of-the art fully upgraded Gamma Knife Perfexion. Treatment times are shorter, accuracy is even better than its most accurate predecessor and outcomes will be even better. The Perfexion delivers 100x less radiation to normal tissue than the latest Cyberknife. Worldwide there is 10x more experience with the Gamma Knife than with any other “knock-off.”

The new Gamma Knife Perfexion

The History of the Procedure

The Gamma Knife concept originated in Stockholm in 1951, when Dr. Lars Leksell, a prominent neurosurgeon, coined the term "Radiosurgery."

Dr. Leksell was a pioneer in "Stereotaxy," a procedure which allows the neurosurgeon to locate and reach any point of the brain to within a single millimeter of accuracy, using trigonometry to navigate the brain's 3-dimensional space.

Consequently, in lieu of performing open surgery on the brain, the neurosurgeon has the ability to precisely focus gamma radiation on a target tumor or vascular malformation. Focused radiation may also be used to treat "functional" disorders such as the tremors resulting from Parkinson's disease, and the pain syndrome of trigeminal neuralgia.

The photon beams of the Gamma Knife intersect precisely on the target.

How the Gamma Knife Works

Contrary to conventional radiation therapy, which must be delivered in small fractions over time (often over as many as six weeks), and in which normal brain tissue is exposed to approximately the same amount of radiation as the tumor target, Gamma Knife radiosurgery employs a greater number of lower level radiation sources (201) arranged in a collimator Helmet. The neurosurgeon intersects these beams on the target.

Each beam is very weak, passing through an area of the brain different from all of the other beams. Thus each beam is safe to normal brain tissue but where they focus is 200 times as powerful as each individual beam.

How the Beams are Directed

In order to focus the beams precisely and accurately, the patient must be fitted with a painless "stereotactic frame" prior to the MRI and Gamma Knife procedure.

The painless stereotactic frame allows accurate focus. Upon removal, the pinsites are essentially invisible a week later.

The combined effect at the intersection of the beams is 201 times as powerful as each individual beam, and can obliterate tumors and vascular malformations in a single treatment.

The Track Record of Gamma Knife Radiosurgery

Gamma Knife radiosurgery is not experimental. The first Gamma Knife treatment was in Sweden in 1968, and since then nearly 20,000 patients per year are being treated successfully worldwide.

Gamma Knife radiosurgery has been performed on American soil since 1987 and by Dr. Duma in Southern California and the east coast since 1990. He has performed approximately 220 Gamma Knife procedures per year since that time.

The medical literature is replete with hundreds of articles relating to Gamma Knife Radiosurgery. It is considered the "gold standard" of radiosurgical technique.

Gamma Knife Radiosurgery | Overview | Procedures | Leading Edge Radiosurgery | Results

For consultation appointments with Dr. Duma or for more information regarding his brain tumor, GammaKnife radiosurgery, and Parkinson's Disease programs at Hoag Memorial Presbyterian Hospital in Newport Beach, California (Orange County), please contact:

949-642-6787
Or E-mail Dr. Duma directly: drduma@cduma.com

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