"The ENT doctors are interested in being more 'focal' or precise with radiation therapy, and hypofractionated radiosurgery certainly offers that potential, with the likelihood of fewer side effects," Dr. Simpson observes. "In fact, an ENT doctor was one of two physicians here who recently went for Leksell Gamma Knife training."
The key components of Extend are patient-friendly fixation devices, such as a vacuum assisted bite block and head support with vacuum pillow. Accurate repeat fixation is ensured with a one-time use of a CT box to obtain precise stereotactic reference points, followed by repeat checks using reposition check instruments for each Gamma Knife session.

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Elekta will deliver Extend to Barnes-Jewish Hospital in early April. Dr. Simpson anticipates treating their first patients soon after.
Barnes-Jewish acquired Leksell Gamma Knife in 1998. In 2008, it was replaced with Leksell Gamma Knife Perfexion, the most advanced radiosurgery solution available. Barnes-Jewish Hospital has performed Gamma Knife surgery on over 2,000 patients and metastases represent half of the medical center's approximately 220 Gamma Knife cases annually.
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