[Comparison between ultrasonic and x-ray computed tomographic measurements of femoral antetorsion in children].

The measurements of femoral torsion by ultrasounds have been performed in both hips of 10 patients according to the technique proposed by Zarate et al. The measurements with CT were done in the same patients according to a technique similar to that used by Hernandez et al. The correlation between US and CT is excellent as far as the minutest particulars of the technique are followed for US examination. The authors recommend ultrasounds, as a non irradiating, non aggressive procedure for the measurement of femoral torsion. US must replace both conventional X-ray and CT for femoral torsion assessment.