X선이나 감마선 같은 이온화 방사선을 사용하여 암세포를 파괴함으로써 질병을 치료하는 의학적 방법.
The medical treatment of disease, especially cancer, using ionizing radiation such as X-rays or gamma rays to destroy malignant cells.
예문:
"The oncologist recommended a combination of surgery and radiotherapy to ensure all cancer cells were eliminated."
"Modern radiotherapy techniques allow for more precise targeting of tumors while sparing healthy surrounding tissue."
"Patients may experience localized skin irritation as a side effect of daily radiotherapy sessions."