Hip2Norm: an object-oriented cross-platform program for 3D analysis of hip joint morphology using 2D pelvic...

Area of Science:

• Orthopedics
• Medical Imaging
• Biomechanical Engineering

Background:

• Accurate 3D hip joint morphology analysis is crucial for diagnosing and managing hip conditions.
• Existing methods may lack standardization for varying pelvic orientations, potentially affecting diagnostic accuracy.

Purpose of the Study:

• To develop and validate a novel object-oriented, cross-platform software (Hip(2)Norm) for 3D hip joint analysis.
• To implement a method for standardizing pelvic orientation from 2D pelvic radiographs for consistent morphologic evaluation.

Main Methods:

• Utilized 2D anteroposterior (AP) pelvic radiographs and optional lateral views to reconstruct 3D hip joints.
• Integrated a cone beam projection model with extracted landmarks.
• Developed a standardization method to correct for individual pelvic tilt and rotation, enabling evaluation in a neutral orientation.

Main Results:

• Successfully reconstructed 3D hip joints from 2D radiographic data.
• The standardization method allowed for objective evaluation of acetabular version and other hip parameters.
• The software was effectively used for interactively objectifying acetabular version in patients with femoroacetabular impingement and developmental dysplasia.

Conclusions:

• Hip(2)Norm provides a robust and standardized approach for 3D hip morphology analysis using readily available 2D radiographs.
• This tool facilitates objective assessment of hip joint parameters, aiding in the diagnosis and management of hip pathologies.
• The cross-platform nature of the software ensures broad applicability across different clinical and research settings.