A new method for tibial torsion measurement by computerized tomography

Area of Science:

• Orthopedics
• Radiology
• Medical Imaging

Background:

• Computerized tomography (CT) is the standard for tibial torsion assessment.
• Existing methods may be affected by fibular abnormalities.
• A need exists for a robust tibial torsion measurement technique.

Purpose of the Study:

• To compare two tibial torsion assessment methods using CT.
• To propose and validate a novel CT-based method for tibial torsion measurement.
• To address limitations of current techniques in cases of abnormal fibular morphology.

Main Methods:

• Retrospective analysis of CT scanograms from 60 participants.
• Application of two distinct techniques for determining the distal tibial axis.
• Evaluation of interobserver and intraobserver reliability for each method.

Main Results:

• High interobserver reliability for both methods (0.861 and 0.863).
• Excellent intraobserver reliability across both techniques (0.868).
• The proposed method demonstrated consistent and reliable measurements.

Conclusions:

• A novel, reliable CT-based method for tibial torsion assessment was developed.
• This new method is independent of the fibular midpoint, enhancing its applicability.
• The proposed technique is valuable for evaluating tibial torsion, especially with fibular anomalies.