Internal radiation therapy (brachytherapy)

Definition

Internal radiation therapy, also known as brachytherapy, is a type of cancer treatment where radioactive materials are placed inside or near the tumor. This localized approach targets cancer cells while minimizing exposure to surrounding healthy tissues.

5 Must Know Facts For Your Next Test

1. Brachytherapy uses radioisotopes such as iodine-125, cesium-137, and iridium-192.
2. This treatment can be temporary or permanent depending on the type of cancer and its location.
3. Brachytherapy allows for high doses of radiation in a concentrated area, reducing overall treatment time compared to external radiation therapy.
4. It is commonly used for cancers of the prostate, cervix, and breast.
5. The effectiveness of brachytherapy depends on precise placement and dosage calculations based on nuclear chemistry principles.

Related terms

Radioisotope: An isotope that emits radiation and is used in medical treatments and diagnostic tests.

External Radiation Therapy: A cancer treatment method where radiation is delivered from outside the body using machines like linear accelerators.

Radiation Dosage: $\text{The amount of radiation absorbed by tissue, measured in units such as grays (Gy) or sieverts (Sv).}$