Radiation dose
Radiation Dose
Radiation dose (pronounced: /ˈreɪdiːˌeɪʃən doʊs/) is a measure of the amount of radiation energy absorbed by the body. It is used in various fields such as radiology, nuclear medicine, and radiation therapy to quantify the level of exposure to ionizing radiation.
Etymology
The term "radiation" comes from the Latin radiatio, meaning "shining" or "emission of rays", while "dose" is derived from the Greek dosis, meaning "a giving or gift".
Types of Radiation Dose
There are several types of radiation dose, including:
- Absorbed dose: This is the amount of radiation absorbed by an object or person. It is measured in grays (Gy).
- Equivalent dose: This takes into account the type of radiation and its biological effect. It is measured in sieverts (Sv).
- Effective dose: This is a measure of the overall risk from radiation to the whole body. It also considers the type of radiation and its effect on different organs and tissues.
Related Terms
- Radiation: The emission of energy as electromagnetic waves or as moving subatomic particles.
- Ionizing radiation': A type of radiation that carries enough energy to detach electrons from atoms or molecules, thereby ionizing them.
- Radiation therapy: The use of high-energy radiation from x-rays, gamma rays, neutrons, protons, and other sources to kill cancer cells and shrink tumors.
- Radiology: The science dealing with X-rays and other high-energy radiation, especially the use of such radiation for the diagnosis and treatment of disease.
- Nuclear medicine: A medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease.
External links
- Medical encyclopedia article on Radiation dose
- Wikipedia's article - Radiation dose
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