Biomechanical Morphing for Personalized Fitting of Scoliotic Torso Skeleton Models

Area of Science:

• Biomedical Engineering
• Orthopedics
• Medical Imaging

Background:

• Patient-specific biomechanical models are crucial for adolescent idiopathic scoliosis (AIS) treatment, particularly for personalized brace design.
• Current methods for creating these models require high-quality imaging, leading to significant radiation exposure, limiting regular patient monitoring.
• Developing methods using less invasive imaging is essential for effective AIS management.

Purpose of the Study:

• To present a novel method for fitting personalized torso skeleton models using biplanar low-dose radiographs.
• To enable accurate and robust creation of patient-specific biomechanical models for AIS treatment.
• To reduce radiation exposure in the regular management of scoliosis patients.

Main Methods:

• A template morphing technique is employed, fitting annotated points on visible spinal anatomy.
• A default biomechanical torso model is utilized for regularization and fitting of less visible structures like the rib cage.
• The method was evaluated on ten young patients, comparing clinical metrics with existing imaging methods.

Main Results:

• The proposed method accurately fits personalized torso skeleton models from low-dose biplanar radiographs.
• Accuracy is comparable to methods requiring more demanding imaging, with superior robustness to artifacts like rib interpenetration.
• Validation on patients using low-dose X-rays confirmed the method's persistent accuracy under less invasive conditions.

Conclusions:

• The developed method offers an accurate and robust solution for obtaining personalized torso skeleton models.
• This technique can be integrated into the regular management of scoliosis patients, improving monitoring and treatment.
• The use of low-dose radiographs significantly reduces radiation exposure, enhancing patient safety and treatment applicability.