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Varian Medical Systems to Showcase Fast, Precise Brachytherapy Planning System at Annual Meeting of American Association of Physicists in Medicine
Date:7/14/2010

ic, rendering them useful to only a handful of researchers for mostly academic purposes. By comparison, Acuros appears to be a major step forward in accuracy and speed."

Professor Mark Rivard, PhD, professor of radiation oncology and chief medical physicist at Tufts Medical Center in Boston, says, "I have been evaluating the Acuros BV system since mid-2009 and it is clear the sophisticated dose calculation algorithm is revolutionary for brachytherapy, with speed that is phenomenal compared to Monte Carlo-based calculations." Prof. Rivard said he finds that Acuros BV will provide more accurate HDR (high dose rate) brachytherapy dose distributions than previously clinically possible.

Dr. Firas Mourtada, of MD Anderson in Houston, Texas, will be presenting his findings at AAPM following a retrospective comparison of TG-43 dose calculations and Acuros BV for breast patients.  

Dose calculations

Dose levels for brachytherapy have generally been calculated as if the sources are surrounded by water, whereas in reality a patient's anatomy contains many different materials such as bone, lung, tissue and air, as well as additional materials that are often present from inserted applicators. In the past the only way to account for this was using Monte Carlo calculation techniques, something that was only available as a research tool. Now, for the first time in routine clinical brachytherapy, Acuros BV is able to account for the dose effects from these variations.

"Acuros BV calculation times tend to average between three and eight minutes depending on the applicator used," adds Sophie Wethera
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SOURCE Varian Medical Systems, Inc.
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