Study Shows Gamma Knife Radiosurgery For Patients With Multiple Brain Metastases Is Best For Sparing Healthy Tissue

The volume of normal brain tissue exposed to radiation during treatment for multiple metastases appears to depend on which stereotactic radiosurgery system is employed, according to a recent study in the Journal of Neurosurgery(1). Comparing treatment plans developed for use by three different treatment systems for a single patient (already previously treated with Leksell Gamma Knife®), researchers found that Gamma Knife plans would result in "much smaller normal brain volumes receiving any particular dose" than the two other systems' plans.

The study compared treatment plans by Washington Fremont Hospital's (Fremont, Calif.) Leksell Gamma Knife® Perfexion™, the University of Utah's (Salt Lake City) BrainLAB Novalis™ system and the University of California San Francisco's Accuray CyberKnife® system and involved a patient with 12 metastatic brain lesions. Gamma Knife is widely regarded as the gold standard for treating brain metastases.

Trigeminal Neuralgia — Gamma Knife

Gamma Knife radiosurgery is an alternative to major surgery to treat trigeminal neuralgia.

“I don’t get it, doc,” complains Andy, a 68-year-old plumber from Newport, WA. “I can bust a knuckle on a pipe and it doesn’t slow me down. I just try not to bleed on a customer’s bath mat! But this? My face hurts so bad, I can’t even open my eyes, chew food, brush my teeth, take a shower — for days at a time! And the Tegretol I take doesn’t even touch the pain, only makes me all gorked out, and I can’t leave the house!”

Andy is talking about trigeminal neuralgia. It is characterized by sudden bursts of facial pain; often triggered by a light touch around the mouth or face or by talking, eating or brushing one’s teeth. The pain is in the areas supplied by the trigeminal nerve: the cheeks, jaw, teeth, gums, lips or around the eye, and sometimes lasts for periods of weeks or months.
Andy is in good company. Approximately 14,000 people develop trigeminal neuralgia each year in the United States; about 140,000 people have the condition. Trigeminal neuralgia is more common in patients with multiple sclerosis.

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FDA approves new drug for late-stage melanoma

The U.S. Food and Drug Administration has approved the first  melanoma  drug in 13 years. The new drug, ipilimumab, which will be sold under the brand name Yervoy and manufactured by Bristol-Myers Squibb, is designed to stop the cancer cells from growing by stimulating the immune system to recognize the cancer cells as something to attack.

"Late-stage melanoma is devastating, with very few treatment options for patients, none of which previously prolonged a patient's life," Richard Pazdur, M.D., director of the FDA's Office of Oncology Drug Products said in a press statement."Yervoy is the first therapy approved by the FDA to clearly demonstrate that patients with metastatic melanoma live longer by taking this treatment."

only hospital on Long Island with the Novalis Tx™ and Gamma Knife® radiosurgery

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Among the usual cures for pulsatile tinnitus are the following: Get Internet #1 - Pulsatile Tinnitus At Night @ to END your sufferings Right Now! * Gamma knife radiosurgery * Clearing of ear canal ...

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Abdominal Aneurysms Repaired with Minimally-Invasive Technique

In addition to its extensive outpatient specialty centers, South Nassau provides emergency and elective angioplasty and is the only hospital on Long Island with the Novalis Tx™ and Gamma Knife® radiosurgery technologies. ...

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Unlike a typical sunburn, where the skin is cooked by ultraviolet radiation from the outside, this burn was caused by highly penetrating gamma radiation; there was almost as much damage under the top layer of skin as on the surface. ... They lie in bed perched on a knife's edge of survival. Tubes and luck are all that anchor them to life. With enough concentrated competent medical care nearly half of these less-exposed people should live long enough to experience the ...

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Gamma Rays: Not Just Science Fiction

Gamma rays seem a thing of science fiction and comic book lore. However, gamma radiation is actually fairly prevalent in our everyday lives and has several uses, including sterilizing of medical equipment and keeping foods fresh.

Perhaps the most important usage of gamma rays is gamma knife surgery.

Gamma Knife Surgery

It sounds even more ludicrous than gamma rays, but gamma knife surgery is a safe and effective treatment for brain tumors, lesions, and functional disorders.

Contrary to the name, gamma knife surgery does not utilize an actual knife and is a relatively non-invasive procedure. Instead of a physical knife, the surgery makes use of highly concentrated doses of gamma radiation. The gamma rays are targeted directly at the tumor, neutralizing the problem with no damage to surrounding areas.

The Procedure

The procedure is accomplished through a simple four-step process: affixing a head frame, imaging, planning, and the actual treatment.

The frame: The treatment requires a stereotactic head frame, used as a means of accurately pinpointing the target tumor or lesion. The frame is attached to a patient’s head using four screws, preventing any potential movement during imaging and treatment.

Imaging: Once the head frame has been properly secured, the patient can proceed to imaging. Whether it’s MRI, CT, or an angiogram, imaging can be done through a number of means, which the treatment physician will decide upon given each individual case.

Getting an image of the brain is important in determining the precise shape, size, position, and severity of the tumor or lesion in the brain. Imaging is just a better way of properly seeing and targeting the problem.

Treatment planning: You can take some time to rest now as your physicians plan out the treatment at hand. Note that every individual patient is subject to a different plan, specific to his or her medical issue.

The treatment plan is specially designed by your doctor with some assistance from another specialist and a computer, working out exactly how the treatment should be performed.

The treatment: Treatment begins once your doctor has worked out an effective plan. You will spend the entire procedure lying on a treatment couch. The treatment is silent and completely painless, and you will be awake throughout the entire process, communicating with doctors and nurses, and otherwise relaxing as best as possible.

If you suffer from any brain tumors or disorders, like trigeminal neuralgia or acoustic neuroma, gamma knife surgery might be the safest and most effective treatment for you.

For more resources about gamma knife surgery or about treatment for brain tumors or even about acoustic neuroma gamma knife, please review these links.

American Shared Hospital Services Announces Upgrade To Gamma Knife Perfexion System

By Business Wire

AMERICAN SHARED HOSPITAL SERVICES (NYSE AMEX:AMS), a leading provider of turnkey technology solutions for advanced radiosurgical and radiation therapy services, announced today that it has entered into a contract to upgrade a Gamma Knife ® to Perfexion TM specifications at Lehigh Valley Hospital in Allentown, Pennsylvania, the flagship hospital of the Lehigh Valley Health Network. As part of the upgrade, AMS has agreed to the early termination of the existing 10-year lease on the Gamma Knife system it supplied to Lehigh Valley Hospital in 2004, and Lehigh has agreed to purchase the Perfexion system. AMS expects pre-tax income of approximately $1.3 million from this transaction in 2011.

AMS Chairman and Chief Executive Officer Ernest A. Bates, M.D., said, "We are pleased that our creative financing solutions made it possible for Lehigh Valley Hospital to step up to today's most advanced radiosurgery technology at an affordable price."

About Gamma Knife ® Perfexion TM

Gamma Knife Perfexion maintains full clinical compatibility with the classic Gamma Knife and is supported by efficacy and outcome data from 500,000 treated patients worldwide and thousands of peer-reviewed scientific articles, making it a proven choice for radiosurgery of the brain. According to its manufacturer, Elekta, Gamma Knife Perfexion reduces unwanted body dose to the patient by up to 100 times compared with competing technologies, which is particularly important for treatment of children and women of childbearing age, and allows for a dramatically increased treatable volume, which is expected to increase the number of patients that can benefit from Gamma Knife surgery. Elekta estimates that the fully automated and efficient single push-button approach can save 3-5 working weeks of physician time per year at an average Gamma Knife center.

About AMS

American Shared Hospital Services ( provides turnkey technology solutions for advanced radiosurgical and radiation therapy services. Since 1991, AMS' creative financing solutions have enabled its clinical partners to make the latest advances in radiation oncology available to patients at an affordable price. AMS is the world leader in providing Gamma Knife® Radiosurgery equipment, a non-invasive treatment for malignant and benign brain tumors, vascular malformations and trigeminal neuralgia (facial pain). The Company also offers the latest IGRT and IMRT systems, as well as its proprietary Operating Room for the 21st Century® concept. AMS also is a leader in proton beam radiation therapy (PBRT), the next great growth opportunity in radiation oncology. AMS currently is developing PBRT centers in Dayton, Ohio (Kettering Medical Center), Boston (Tufts Medical Center), Orlando (Orlando Regional Healthcare) and Long Beach, California (Long Beach Memorial Medical Center), and is negotiating additional projects. AMS also owns a preferred stock investment in Still River Systems, developer of the compact Monarch 250 PBRT system, which has not yet been approved by the FDA.

Safe Harbor Statement

This press release may be deemed to contain certain forward-looking statements with respect to the financial condition, results of operations and future plans of American Shared Hospital Services, which involve risks and uncertainties including, but not limited to, the risks of the Gamma Knife and radiation therapy businesses, the risks of developing The Operating Room for the 21st Century program, and the risks of investing in a development-stage company, Still River Systems, Inc., without a proven product. Further information on potential factors that could affect the financial condition, results of operations and future plans of American Shared Hospital Services is included in the filings of the Company with the Securities and Exchange Commission, including the Company's Annual Report on Form 10-K for the year ended December 31, 2009, the Quarterly Report on Form 10-Q for the quarters ended March 31, 2010, June 30, 2010, and September 30, 2010, and the definitive Proxy Statement for the Annual Meeting of Shareholders held on June 2, 2010.

Swedish Establishes Integrated Radiosurgery Center in Seattle

Gamma Knife® paired with CyberKnife® in region’s first facility of its kind

SEATTLE, March 8, 2011 /PRNewswire/ — Two of the most advanced tools for precise, radiotherapy-based treatment are now under one roof in Seattle. Swedish Medical Center this month became the first facility in the Pacific Northwest – and one of only a handful in North America – to open a unit that incorporates both CyberKnife and Gamma Knife technologies. The 3,950-square-foot Swedish Radiosurgery Center, formerly known as the Seattle CyberKnife Center, is located on the "A" Level of the James Tower on the Cherry Hill Campus at 500-17th Ave.

The Center recently installed the latest model Leksell Gamma Knife, made by Elekta. It complements the Accuray CyberKnife, which has been operational for five years and been used on approximately 1,000 patients. The neurologists, neurosurgeons, neuro-oncologists and neuroradiologists of the Swedish Neuroscience Institute have joined forces with the radiation and medical oncologists of the Swedish Cancer Institute to provide a broad range of experience and expertise matched at few centers in the world.

Asan hospital adopts new Gamma knife

The Asan Medical Center has adopted the cutting-edge Gamma knife device, “Perfexion” for its Gamma Knife Center.

The center, which has recently marked 5,000 cases of operation for the first time in the nation, said the device will enhance accuracy and sophistication in the surgery room.

Gamma Knife is a radiosurgical treatment that delivers a dose of gamma radiation to the target with surgical precision, according to

The patient wears a specialized helmet that is fixed to the skull so that the brain tumor remains stationary at the target point of the gamma rays. An ablative dose of radiation is sent through the tumor while surrounding brain tissues are relatively spared in one session.

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Wake Forest University Baptist Medical Center Chooses Elekta for Major Oncology Upgrade

STOCKHOLM -- Regulatory News:

Wake Forest University Baptist Medical Center in Winston-Salem, North Carolina has entered into a long-term agreement with Elekta to upgrade and modernize its radiation oncology facilities, including its main campus and satellite facilities. The agreement includes Wake Forest Baptist’s acquisition of multiple radiation therapy treatment systems, electronic medical record systems and clinical consulting services, as well as a reload of their Leksell Gamma Knife® Perfexion™ radiosurgery system. The order is included in Elekta’s fiscal third quarter.

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Gamma Knife® to PerfexionTM specifications at Lehigh Valley Hospital in Allentown, Pennsylvania

AMERICAN SHARED HOSPITAL SERVICES (NYSE AMEX:AMS), a leading provider of turnkey technology solutions for advanced radiosurgical and radiation therapy services, announced today that it has entered into a contract to upgrade a Gamma Knife® to PerfexionTM specifications at Lehigh Valley Hospital in Allentown, Pennsylvania, the flagship hospital of the Lehigh Valley Health Network.

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