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Experts Assert That Varian Technologies Deliver Speed and Clinical Accuracy in Treating Cancer Patients
Date:9/24/2008

multileaf collimators that continually shape the radiation beam so it

matches the shape and size of the tumor from all angles.

4) Greater understanding of the clinical radiobiology of radiotherapy, an

effort that continues and that is leading to new studies in the

"uncharted waters" of stereotactic radiotherapy and radiosurgery,

involving very high dose treatments delivered in just one to five

treatment sessions.

The Promise of RapidArc

Using Varian's RapidArc radiotherapy technology in the treatment of brain tumors, Ben Slotman, who is professor and chairman of the Department of Radiation Oncology at the VU University Medical Center in Amsterdam, Netherlands, said he was able to shorten his treatment protocols by an hour or more per patient. Slotman delivered whole-brain radiotherapy plus an integrated stereotactic boost in five sessions that took fifteen minutes per day from start to finish (including imaging, patient positioning, and treatment). "The main benefit to integrating the stereotactic boost by using RapidArc is the fact that the patient does not have to lie still for an additional 60-90 minutes," Slotman said.

"The delivery of a RapidArc treatment is very fast, which has important clinical implications," he added. "Treatment times are much shorter, so there is less chance that a patient will move during treatment, which helps to ensure accurate targeting. Another clear benefit is that it is more comfortable for patients and more patients can be treated in a single day," he said.

Slotman and his colleagues compared RapidArc treatment plans with plans for conventional IMRT. The RapidArc plans were faster to create, he said, and they produced equal or better dose distributions with superior protection of surrounding healthy tissues.

Advances in Image-Guided Radiosurgery with the Novalis Tx Platform

Three-dimensional cone-beam CT imaging is enabling Benjam
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SOURCE Varian Medical Systems, Inc.
Copyright©2008 PR Newswire.
All rights reserved

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