radioterapeias

Radiotherapy, also known as radiation therapy, is a medical treatment that uses high-energy radiation to kill cancer cells or shrink tumors. It is often used in conjunction with surgery, chemotherapy, or other radiation treatments. The radiation can be delivered externally, using a machine outside the body, or internally, using radioactive materials placed inside the body.

External beam radiotherapy involves directing a beam of radiation at the tumor from outside the body. This can be done using photons, electrons, or protons. The beam is typically shaped to cover the tumor while minimizing exposure to surrounding healthy tissue. The number of treatments and the dose of radiation per treatment depend on the type and stage of cancer, as well as the patient's overall health.

Internal radiotherapy, also known as brachytherapy, involves placing radioactive materials directly into or near the tumor. This can be done using seeds, wires, or catheters. The radioactive materials release radiation over a period of time, allowing for a high dose of radiation to be delivered to the tumor while minimizing exposure to surrounding healthy tissue.

Radiotherapy is often used to treat cancers of the head and neck, breast, lung, prostate, and gynecological cancers, among others. It can also be used to treat conditions such as benign prostatic hyperplasia and certain types of skin conditions. The effectiveness of radiotherapy depends on the type and stage of cancer, as well as the patient's overall health. It is typically used as part of a comprehensive treatment plan that may include surgery, chemotherapy, and other therapies.