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New Treatment Option in the Pipeline for Those Suffering From Lung Cancers

According to the medical physicist Cihat Ozhasoglu, Ph.D. of the University of Pittsburgh Medical Center a highly intense beam of radiation that is delivered// by a robotic arm is very effective in the complete removal of lung tumors in some patients.

Patients with lung tumors are the worst affected as the tumors migrate to different areas which breathing. But this new discovery has instilled hope in patients suffering from lung cancer. Dr Cihat Ozhasoglu is going to present a report on this new treatment in early August at the 48th Annual Meeting of the American Association of Physicists in Medicine in Orlando. But further research is needed to analyze the long term effectiveness of this novel treatment. At the University of Pittsburgh, Ozhasoglu and approximately 30 colleagues form one of the largest US teams devoted to the CyberKnife, a radiation delivery system that uses an accurate, precise robotic arm to aim highly focused x-ray beams at the site of a tumor.

Currently there are 76 active CyberKnife sites worldwide (with 45 in the US), and an additional 62 scheduled to be installed globally. Recently, the Pittsburgh researchers upgraded their CyberKnife by adding a system called ‘Synchrony,’ which accurately targets tumors that move as a result of breathing. Synchrony instructs the robotic arm to move the radiation source (a linear accelerator that produces x-rays) in sync with the tumor motion. As a result of the unique real-time tumor tracking capabilities of their upgraded CyberKnife, the researchers have established detailed methods for the safe treatment of lung tumors which otherwise couldn't be treated with a high dose of radiation due to lack of sufficient real-time tracking accuracy in other, more conventional radiation therapy machines. Treating lung tumors with the enhanced Cyberknife requires only 1-3 sessions lasting 60-90 minutes.

In conventional radiotherapy, patients must endure dozens of radiation treatments, eac h lasting about 15 minutes but requiring 20-30 hospital visits. In a single treatment, Cyberknife blasts a lung tumor from all sides by delivering typically 100-150 intense, focused x-ray beams, causing the tumor to absorb approximately 10 times more radiation than in a conventional radiotherapy session. Cyberknife can deliver so much more radiation than other techniques because its robotic arm aims the x-rays precisely enough to avoid surrounding healthy tissue. To track the moving tumor, the CyberKnife takes real-time x-ray pictures of the patient while using external markers attached to the patient's chest or abdomen to follow tumors in real time with a few millimeters of accuracy. The researchers also applied Synchrony to treating tumors in the thorax and abdomen, which can move as much as 4 cm during respiration.

Source Eurekalert
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