Sunday, May 20, 2012

Conclusions Radiation Exposure and Pregnancy



Radiographic, fluoroscopic, and CT examinations in areas of the body other than the abdomen and pelvis deliver minimal radiation doses to the fetus. Moreover, fetal radiation doses from radiographic, fluoroscopic, and CT examinations of the abdomen and pelvis and from nuclear medicine studies rarely exceed 25 mGy.After comparing the doses from radiologic and nuclear medicine examinations with risk data from human in utero exposures, we have concluded that the absolute risks of fetal effects, including childhood cancer induction, are small at conceptus doses of 100 mGy and negligible at doses of less than 50 mGy.While this information may reassure pregnant women and their physicians about the risks from necessary or unintended radiation exposures, conservative clinical management is the best way of minimizing radiation risk in utero. Radiologic or nuclear medicine examinations should be performed in such patients only when necessary, and—as with any drug or intervention in pregnancy—the dose used for the examination should be kept as low as reasonably achievable (32).

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