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9) For comparison with medical diagnostic imaging procedures, the organ/local tissue dose to the breast from routine mammography is about 3 mGy (3 milligray, or 3/1,000 of a gray), to the stomach from a typical abdominal CT scan is about 20 mGy, and to the colon from a Barium enema is about 15 mGy.
Until then the internationally accepted "tolerance dose"--the dose that can be absorbed without harm--was 680 milligrays (mGy) per year.
The 1934 "tolerance dose" of 680 milligray (68 rad) per year was based on 35 years of medical experience.
On average, women with large breasts screened on a small detector received almost 5 milligray (mGy) of radiation, which exceeds the American College of Radiology guidelines of 3-4 mGy or less for a standard two-view mammogram.
The NRPB recommends that "any procedure that delivers doses to the fetus of some tens of milliGray .
1) For radiation such as x-rays and gamma rays, a mSv is the same as a milligray (mGy).
Radiation doses are commonly described in millisieverts [mSv] or milligrays [mGy], both measures of the energy absorbed by body tissues.
4 milligray during pregnancy than were women who delivered normal-birth-weight babies.