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Dictionary of Cancer Terms

View in Spanish: Terapia de fotones de energía alta

High-energy photon therapy (hy-EH-nur-jee FOH-ton THAYR-uh-pee)
A type of radiation therapy that uses high-energy photons (units of light energy). High-energy photons penetrate deeply into tissues to reach tumors while giving less radiation to superficial tissues such as the skin.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.