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News

Accuray unveils new adaptive imaging system for prostrate treatment

Accuray : 22 September, 2008  (New Product)
Accuray has introduced the InTempo Adaptive Imaging System, which enhances the CyberKnife Robotic Radiosurgery System's ability to continually track and correct for motion of the prostate during treatment.
Studies have confirmed that the prostate can move significantly in only a matter of seconds during treatment delivery. With the introduction of the InTempo System, radiation delivery with the CyberKnife System automatically adapts to patient-specific intra-fraction prostate motion. By intelligently increasing imaging frequency during periods of rapid and erratic prostate movement, the CyberKnife System tailors treatment delivery uniquely to the movements of the prostate throughout the treatment session. The continual assessment of prostate motion combined, with the CyberKnife System's automatic correction for movement in real time, not only helps to ensure prescribed doses are delivered to the prostate; it also helps to ensure surrounding sensitive structures are maximally spared.

With conventional radiation delivery techniques, such as 3D conformal and arcing IMRT, large treatment margins are commonly used to ensure adequate dose coverage in the event a potential prostate shift occurs. Thd additional dose coverage often encompasses regions of the rectum, bladder, and urethra, increasing the risks of related toxicities and complications.

'Motion of the prostate during treatment has long been recognized as one of the major limiting factors for prostate dose escalation. This motion requires continual monitoring throughout treatment, which only the CyberKnife System can provide,' said Eric P Lindquist, senior vice president and chief marketing officer at Accuray. 'The InTempo System takes the treatment of prostate cancer to an entirely new level, giving clinicians added confidence when delivering high-dose, hypofractionated radiation.'

With advanced robotic technology, the CyberKnife System utilises continual image guidance to automatically track, detect, and correct for intra-fraction motion throughout the treatment. In contrast, conventional imaging technologies, such as IGRT and cone-beam CT, can provide a high degree of precision for pre-treatment patient alignment, but the image age - or time between when the set-up image was captured and beam delivery is completed - can be five minutes or more. Using such imaging technologies, conventional radiation delivery systems often fail to recognise prostate movements that occur during treatment delivery, potentially resulting in considerable degradation of overall targeting accuracy.
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