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sievert
(redirected from Microsievert)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
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.


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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.
One microSievert is a thousandth of a milliSievert.
 
 
 
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