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Independent study highlights CyberKnife’s extracranial radiosurgery benefits

Accuray : 20 June, 2007  (New Product)
Accuray’s latest utilisation data has confirmed that 100 percent of CyberKnife centres in the USA are treating extracranial tumours.
The treatments of lung and prostate cancers are also on the rise at CyberKnife facilities.

The latest data show that approximately 90 percent of CyberKnife centres in the USA now treat lung tumours with radiosurgery. The number of lung patients treated worldwide rose by a 30 percent from first to second quarter of fiscal 2007. Similarly, there was a 30 percent increase in the number of prostate patients treated during that same time frame. An increasing number of centres are using the CyberKnife System to treat these indications and an increasing number of their patients are receiving these treatments.

A survey by independent research firm Dominic & Irvine in March 2007 reported that for 88 percent of all-purpose systems, which combine Radiotherapy and Radiosurgery capabilities, less than 10 percent of the procedures were extracranial radiosurgery. The all-purpose system utilisation is stark in contrast to CyberKnife utilisation, which shows that 100 percent of US installed CyberKnife Systems are used for extracranial radiosurgery. This confirms that, although some facilities have secured all-purpose systems, clinicians rarely use extracranial Radiosurgery capabilities on any machine other than the CyberKnife System.

While Radiosurgery was traditionally used for the treatment of intracranial tumours, the CyberKnife System has extended radiosurgical applications to include the treatment of tumours anywhere in the body. The CyberKnife System offers a non-invasive alternative to surgery by delivering high-dose radiation to tumours with extreme precision in as few as one to five treatments.

“There has been a lot spoken recently about all-purpose units from Varian, Elekta and BrainLAB, and their ability to perform whole-body radiosurgery,” said Eric P Lindquist, senior vice president and chief marketing officer of Accuray. “While these companies may claim they can perform extracranial radiosurgery, we believe the results of independent research, in conjunction with the centre utilisation numbers announced today and growth in patient treatment volumes, demonstrate that the CyberKnife System is the only technology in routine use for extracranial radiosurgery.”

The CyberKnife System is ideally suited for the demands of Radiosurgery and provides clinicians with sophisticated features not found in all-purpose systems. For example, the CyberKnife System offers continual image guidance throughout the treatment process and its intelligent robotic capabilities automatically compensate for movement of the patient and tumour. These attributes enable treatment with sub-millimetre accuracy anywhere in the body, something that is unattainable in all-purpose systems. This additional level of accuracy combined with the fine dose sculpting capabilities of the CyberKnife System minimises damage to surrounding healthy tissue and critical structures.

“We believe that it’s the technical capabilities of the CyberKnife System that provide our users with the clinical confidence to deliver extracranial Radiosurgery and enable them to provide better care for their patients,” said Lindquist.
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