Brachytherapy, also known as sealed source radiotherapy or endocurietherapy, is a form of radiotherapy where a radioactive source is placed inside or next to the area requiring treatment.

• 近距离也称为:近距离内放射治疗；近距离组织间放疗；近距离/放射性同位素；填隙近距离；近距离；植入近距离治疗的放射性同位素.