Related Experiment Video
Updated: Jul 20, 2026
In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
Published on: July 2, 2021
Manual versus digital radiographic measurements in acetabular dysplasia
Mathew A Halanski1, Kenneth J Noonan, Mathew Hebert
1University of Wisconsin, Dept of Orthopedics and Rehabilitation, K4/732 Clinical Science Center, 600 Highland Ave, Madison, WI 53792, USA.
Abstract:
The intraobserver and interobserver variability of common radiographic measurements associated with hip dysplasia from plain and digital radiographs was assessed. Only the interobserver reliability of measuring Hilgenreiner's distance was found to be potentially clinically significant. The average Spearman correlation coefficients between groups were 0.81 acetabular index, 0.80 medial teardrop to medial metaphysis distance, and 0.77 Hilgenreiner's distance. The average difference between digital and plain radiographs was acetabular index 0.97 +/- 0.6 degrees, medial teardrop to medial metaphysis distance 0.5 +/- 0.56 mm, and Hilgenreiner's distance 0.41 +/- 0.78 mm. These values are clinically insignificant; therefore, digital radiographs are as reliable as conventional radiographs in assessing hip dysplasia.
