8 APRIL - JUNE 2023RADIATION ONCOLOGY: LIGHT YEARS FROM WHERE WE STARTED AND TRANSFORMING CANCER CAREBy Percy Lee, MD, Medical Director of Orange County and Coastal Region Radiation Oncology, City of Hope Orange County; Vice Chair of Clinical Research, Department of Radiation Oncology and Professor, Department of Radiation Oncology, City of Hope hen people think of radiation oncology, they often imagine giant X-ray machines from the last century. So much has changed over the years. While our machinery is still large, it is more precise than ever and radically changing outcomes for cancer care. With enhanced precision and accuracy, many treatments are reduced from many weeks to five or fewer. It's an exciting era for all of us in this field. As the medical director of Orange County & Coastal Region Radiation Oncology for City of Hope Orange County, I have the privilege of overseeing radiation oncology at City of Hope Orange County Lennar Foundation Cancer Center in Irvine, Calif.--the most advanced comprehensive cancer center in the nation's sixth largest county--and our network of advanced cancer care. We are using some of the most advanced radiation oncology technology available, providing each person with a tailored treatment plan.Here are some of the latest advances in our field that have improved clinical outcomes for our patients.Intensity-modulated Radiation Therapy (IMRT): My job is to use radiation as an extremely powerful tool to eradicate cancer cells, working closely with experts from other disciplines. The challenge is to only attack cancer and not normal cells. Newer technology, such as Intensity-Modulated Radiation Therapy (IMRT), does just that. This advanced method of radiotherapy delivers precise radiation doses to a malignant tumor or even specific areas within the tumor while minimizing the dose to surrounding healthy tissue. It is ultra-exact and extremely powerful.Stereotactic Body Radiotherapy (SBRT): It makes sense that one of our goals is to minimize the number of treatments while being as effective as possible at eliminating cancer. Stereotactic Body Radiotherapy allows us to do this by focusing high-dose radiation onto a small area of the body. It is so effective we can often reduce the number of sessions to five or fewer, as compared to traditional approaches of 30 or more. This technology is also recommended to treat cancers that are too high risk for surgery.High-Dose-Rate (HDR) Brachytherapy ­ With brachytherapy, we deliver high-dose radiation internally via a surgical procedure. By applying these higher doses of radiation directly for a shorter period (often for a few minutes), we can be more effective in Percy LeeWIN MY OPINION
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