Xray or CT: Fetal radiation doses up to 1 mGy—used in most radiologic examinations below the knees and above the diaphragm—are considered acceptable, with an additional risk of carcinogenesis of less than one in 10,000. With larger doses (eg, a fetal dose of 20–50 mGy received during pelvic CT), the risk of carcinogenesis increases approximately by a factor of 2, although it remains low in absolute terms (less than one in 250).
MRI: There has been no documented damage to a developing human fetus caused by MR imaging exposure. However, caution is advised, and risks and benefits must always be weighed before evaluating a pregnant patient with MR imaging.
Some content on this page was disabled on January 22, 2016 as a result of a DMCA takedown notice from Attributor, Inc.. You can learn more about the DMCA here: