The authors describe a simplified routine procedure for CT pelvimetry. The procedure was successfully performed in 122 women with a 2% false positive rate corresponding to obese women. The originality of the procedure consists in the development of a simple technique of correction of the widest transverse diameter based on the anteroposterior topogram. The values obtained are transformed into real values of the transverse inlet diameter measurements. The procedure presented is simple, accurate, and enables considerable reduction of fetal radiation exposure.