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Australia's Prince of Wales Hospital Launches New Era of Targeted Lung Cancer Treatments with Elekta's Advanced 4D Motion Management Technology
Date:10/31/2011

SYDNEY, Oct. 31, 2011 /PRNewswire/ -- To successfully irradiate a moving lung tumor requires doctors to find a way either to stop the tumor from moving or a means to compensate for its motion. On September 8, clinicians at Prince of Wales Hospital Cancer Centre (Randwick, New South Wales) chose the second option, using Elekta's Symmetry™ respiratory motion management software for the first time to treat a 75-year-old male patient with a tumor that moved back and forth with his breathing. Symmetry enables physicians to visualize the tumor's complete range of motion and then ensures that the tumor is always positioned in the treatment beam regardless of its movement.

Accurate treatment of this patient's tumor, a primary, malignant non-small cell cancer (NSCLC) in the upper lobe of the left lung, was critical due to the therapy approach used. Prince of Wales Hospital clinicians used hypofractionated Stereotactic Body Radiation Therapy (SBRT), which called for precise immobilization of the patient's body to enable just three treatment sessions (i.e., fractions), each using a highly potent radiation dose.

"The whole concept of hypofractionated stereotactic treatment relies on accurate and precise planning datasets and treatment verification systems," says Wenchang Wong, M.D., radiation oncologist at Prince of Wales Hospital. "Symmetry afforded us clear visualization of the tumor at the treatment couch and gave me confidence that treatment delivery would be safe and reproducible for this patient."

Symmetry, a feature set of Elekta's X-ray Volume Imaging (XVI) software package, enables clear visualization of moving lung tumors by providing a dynamic fourth dimension (4D) of motion to enhance image guidance with the patient in the treatment position.

"Conventional cone beam CT provides only a static, blurred image of a moving lung tumor that
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