Abstract
Introduction The aim of this study was to compare the compliance of sacrum ultrasonography with
radiography for the measuring of sacral ratio in infants.
Materials and Methods A total of 129 infants under the age of 6 months, who were a candidate for abdominal
and/or pelvic radiographs, were assessed. Sacrum ultrasonography and radiography were
performed by a single radiologist using the same device. The sacral ratio was calculated
for all patients undergoing ultrasonography and radiography. Agreement between two
methods was calculated by Bland-Altman's chart.
Results The mean of sacral ratio was 0.70 ± 0.11 radiographically and 0.72 ± 0.05 ultrasonographically.
Based on Bland-Altman's chart, the mean difference between ultrasonography and radiology
was 4.6 mm (confidence intervals of 8.18 ± 5.6).
Conclusion Sacrum ultrasonography could be safely used in the investigation of sacral ratio
to detect sacrum abnormalities in infants.
Keywords
sacral ratio - sacrum ultrasonography - radiography
