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Varian Medical Systems Receives FDA 510(k) Clearance for High-Definition Collimator That Enables Ultra-Fine Intensity-Modulated Radiosurgery
Date:9/18/2007

ent beam as the radiation is delivered from different angles around the patient. Prior to the new HD120 MLC multileaf collimator, Varian's finest MLC had a central group of beam-shaping leaves that were each 5 millimeters wide. The HD120 MLC has reduced the width of the central leaves to just 2.5 millimeters, increasing the beam-shaping precision by 100 percent.

The new collimator also offers improved dose delivery characteristics, including a steeper dose fall-off gradient, so that the amount of dose delivered decreases rapidly outside the targeted area, protecting healthy tissues more effectively than is possible with earlier beam shaping devices. The HD120 MLC was also designed for durability, so that it can be relied upon during continual use in a busy clinic.

"This new high-definition multileaf collimator builds on Varian's widely recognized accomplishments in advancing MLC technology, and underscores our commitment to meeting the unique needs of clinicians offering stereotactic radiosurgery and stereotactic body radiotherapy," Huntzinger said. Varian already offers the broadest range of beam-shaping products, including 52-, 80- and 120-leaf collimators for radiation oncology. Multileaf collimators are now included with nearly every order for Varian's linear accelerators.

"The multi-leaf collimator has revolutionized radiotherapy and it is now poised to do the same with radiosurgery," Huntzinger said. "We are committed to extending this life-saving technology to help more patients in a broader range of cases."

ABOUT VARIAN MEDICAL SYSTEMS

Varian Medical Systems, Inc., of Palo Alto, California, is the world's leading manufacturer of medical devices and software for treating cancer and other medical conditions with radiotherapy, radiosurgery, proton therapy, and brachytherapy. The company supplies informatics software for managing comprehensive cancer clinics, radiotherapy centers and medical oncology practices. Varian is a premier s
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SOURCE Varian Medical Systems, Inc.
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