ABSTRACT
Radiation oncology is a modest-size field with about 4,000 practicing radiation oncologists in the United States. Nevertheless, the clinical impact of radiation therapy (RT) is significant. Approximately 50% of patients with cancer receive RT, with about 600,000 patients treated annually in the United States alone. RT plays an important role in the curative and palliative management of most malignancies and is also used to treat some benign conditions.
