CT texture analysis of acetabular subchondral bone can discriminate between normal and cam-positive hips
Objectives The purpose of this study was to determine if the CT texture profile of acetabular subchondral bone differs between normal, asymptomatic cam-positive, and symptomatic cam-FAI hips. In addition, the utility of texture analysis to discriminate between the three hip statuses was explored usi...
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Veröffentlicht in: | European radiology 2020-08, Vol.30 (8), p.4695-4704 |
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Sprache: | eng |
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Zusammenfassung: | Objectives
The purpose of this study was to determine if the CT texture profile of acetabular subchondral bone differs between normal, asymptomatic cam-positive, and symptomatic cam-FAI hips. In addition, the utility of texture analysis to discriminate between the three hip statuses was explored using a machine learning approach.
Methods
IRB-approved, case-control study analyzing CT images in subjects with and without cam morphology from August 2010 to December 2013. Sixty-eight subjects were included: 19 normal controls, 26 asymptomatic cam, and 23 symptomatic cam-FAI. Acetabular subchondral bone was contoured on the sagittal oblique CT images using ImageJ ®. 3D histogram texture features (mean, variance, skewness, kurtosis, and percentiles) were evaluated using MaZda software. Groupwise differences were investigated using Kruskal-Wallis tests and Mann-Whitney
U
tests. Gradient-boosted decision trees were created and trained to discriminate between control and cam-positive hips.
Results
Both asymptomatic and symptomatic cam-FAI hips demonstrated significantly higher values of texture variance (
p
= 0.0007,
p
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ISSN: | 0938-7994 1432-1084 |
DOI: | 10.1007/s00330-020-06781-1 |