Fetal dose in pregnant CT patients: a comparison of four software packages

Question Differences between calculation software in terms of morphologies and types of phantoms used have an impact on FD calculations? Findings Software choice has an impact on calculated FD, but is not expected to alter patient management except for extreme cases with multiple CT exams. Clinical relevance The FD limit of 100 mGy, defined by the International Commission on Radiological Protection, cannot be reached with a single CT examination, and may only be of concern in cases where the patient undergoes multiple exams with the whole fetus exposed.