Precision Radiation Can Destroy Tumors Surgery Cannot Reach
11/7/2006 Durham, NC staff HealthNewsDigest.com Debora Tisdale didn't want to lose her heart in the process of saving her cancerous breast. She feared that during radiation treatment, the searing beams intended to attack her breast tumor could also inadvertently strike her healthy heart. "I thought, 'I'm going to live through breast cancer and then die of a heart attack," said 44-year-old Tisdale of Raleigh, N.C. Her family history of heart disease only intensified her worries. Just a year ago, the state of radiation technologies may have justified Tisdale's fears: radiation was difficult to harness and channel directly to the tumor, and healthy tissue often was damaged during treatment. But today, scientists in Duke University Medical Center's Department of Radiation Oncology, along with scientists at a handful of other institutions, are providing the medical equivalent of a guided navigation system to irradiate the tumor itself while avoiding healthy tissue nearby. The new techniques, known as "intensity-modulated radiation therapy" (IMRT) and "image-guided radiation therapy" (IGRT), are so precise that they hit the tumor while barely straying outside its perimeter, said Fang Fang Yin, Ph.D., director of radiation physics at Duke. The technology enables physicians to view the tumor in real time, with a three-dimensional view, as it shifts with the patient's breathing and the motion of nearby organs. Yin presented new data on Duke's experience using the technologies to treat patients on Monday, Nov. 6, 2006, at the annual meeting of the American Society of Therapeutic Radiology and Oncology, in Philadelphia. According [...]