What are the two methods of delivering radiation therapy treatments?

The correct method of delivering radiation therapy treatments involves both internal and external approaches. In external radiation therapy, high-energy beams, such as X-rays or gamma rays, are directed at the tumor from outside the body. This is the most common method and allows for targeted treatment, minimizing exposure to surrounding healthy tissues.

Internal radiation therapy, also known as brachytherapy, involves placing a radioactive source directly inside or very close to the tumor. This method allows for a higher dose of radiation to be delivered to the cancerous cells while reducing the radiation exposure to adjacent normal tissues.

This distinction between internal and external radiation delivery is fundamental to understanding the various techniques used in radiation therapy and their applications in treating different types of cancers.