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sievert |
Also found in: Medical, Wikipedia, Hutchinson | 0.03 sec. |
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sievert [′zē·vərt] (nucleonics) The International System unit of dose equivalent, equal to the dose equivalent when the absorbed dose of ionizing radiation multiplied by stipulated dimensionless factors is 1 joule per kilogram. Abbreviated Sv. A unit of radiation dose, equal to the dose delivered by a point source of 1 milligram of radium, enclosed in a platinum container with walls 0.5-millimeter thick, to a sample at a distance of 1 centimeter over a period of 1 hour; equal to approximately 8.38 roentgens. Also known as millicurie-of-intensity-hour. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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During the middle portion of the plane's journey, while the aircraft flew between Utah and Ohio at a cruising altitude of about 11,300 meters, onboard instruments measured radiation doses normal for that latitude and altitude, about 3 microsieverts ([mu]Sv) per hour. Radiation is the largest problem with X-rays - a full series of films of the mouth and maxillofacial structure subjects the patient to almost 250 microsieverts of radiation. The estimated magnitude of increase was 1% per microsievert per hour [95% confidence interval (CI), 0. |
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