Gray (unit)
Gray (unit)
The Gray (SI unit of radiation dose absorbed by matter) is a derived unit of ionizing radiation dose in the International System of Units (SI). It is defined as the absorption of one joule of radiation energy per kilogram of matter. It is named after British physicist Louis Harold Gray, who is known for his work on the effects of radiation on the human body. The unit is represented by the symbol Gy.
Definition and Use[edit | edit source]
The gray is an SI unit for the measure of absorbed radiation dose. It is used in the field of radiology, radiation therapy, and radiation protection, and is primarily used to measure the absorbed dose in the patient's tissue during radiotherapy.
One gray is equivalent to one joule of energy deposited in a kilogram of a substance. The higher the number of grays, the higher the absorbed dose of radiation, and thus the higher the potential damage to the tissue.
Measurement and Dosimetry[edit | edit source]
The measurement of absorbed dose profiles in a medium is known as dosimetry. In radiation therapy, dosimetry is used to calculate the correct dose of radiation. The gray is used in calculations to ensure that the target area receives the correct dose, while minimizing the dose to surrounding healthy tissue.
Effects on Human Health[edit | edit source]
The effects of exposure to large amounts of radiation can be severe, including radiation sickness, cancer, and death. The risk of health effects from radiation is dependent on the type of radiation, the duration of exposure, and the part of the body exposed.
See Also[edit | edit source]
References[edit | edit source]
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
|
WikiMD's Wellness Encyclopedia |
| Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD
