Key result
Three-dimensional CT analysis measured significantly less femoral antetorsion (mean 8.25 degrees) compared to standard two-dimensional slice-based CT analysis (mean 22.1 degrees, p<0.001).
Why the study?
Leg position during imaging may affect 2D CT femoral torsion measurements, whereas 3D analysis might portray hip anatomy more accurately and reliably.
Does 3D analysis of hip CT differ from 2D slice-based analysis in measuring femoral torsion in patients with hip pain?
Population
20 patients
Comparison
3D modeling and analysis vs standard 2D slice-based CT approach
Design
Prospective cohort study
Authors
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3D CT yields lower femoral antetorsion values than 2D in hip pain; leaves open whether this alters surgical thresholds or outcomes.
Cohort (n=20)
No
Does 3D analysis of hip CT differ from 2D slice-based analysis in measuring femoral torsion in patients with hip pain?
Mean Difference: -13.85
Absolute Event Rate: 8.25% vs 22.1%
p-value: p=<0.001
3D CT analysis of femoral torsion yields significantly lower antetorsion measurements (by approximately 14°) compared to standard 2D slice-based methods, which may impact surgical decision-making for hip impingement and instability.
Ratner et al. (2022) conducted a cohort in Hip pain (n=20). Three-dimensional (3D) analysis of CT vs. Two-dimensional (2D) slice-based analysis of CT was evaluated on Femoral antetorsion measurement (Mean difference of 13.85 degrees, p=<0.001). Three-dimensional CT analysis measured significantly less femoral antetorsion (mean 8.25 degrees) compared to standard two-dimensional slice-based CT analysis (mean 22.1 degrees, p<0.001).
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