Radiation Doses to the Unborn Child at Diagnostic Examinations in Sweden
نویسندگان
چکیده
This report describes methods to estimate fetal radiation doses from radiation diagnostic examinations, based on survey data from 3 hospitals in southern Sweden. The fetal dose has been calculated with available computer programs and verified by dose measurements inside a female human phantom for conventional X-ray and computed tomography (CT) examinations. Measured fetal doses have been correlated to the DAP (Dose Area Product) value or the CTDI (Computer Tomography Dose Index) and DLP (Dose Length Product) values and conversion factors have been evaluated. For nuclear medicine examinations tables for the calculations of fetal doses by administered activity are presented together with information of administered activity for normal and pregnant women in Sweden. For X-ray examinations where the uterus is outside the primary radiation fields the fetal dose is generally below 1-2 mSv. In order to calculate fetal doses documentation of fluoroscopy time and number of X-ray images, scanning parameters for the CT and administered activity for nuclear medicine examinations are necessary.
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