A novel method for assigning bone material properties to a comprehensive patient-specific pelvic finite element model using biplanar multi-energy radiographs

Ningxin Qiao, Isabelle Villemure and Carl-Eric Aubin

Computer Methods in Biomechanics and Biomedical Engineering, 2024, vol. 27, issue 16, 2377-2388

Abstract: The increasing prevalence of adult spinal deformity requires long spino-pelvic instrumentation, but pelvic fixation faces challenges due to distal forces and reduced bone quality. Bi-planar multi-energy X-rays (BMEX) were used to develop a patient-specific finite element model (FEM) for evaluating pelvic fixation. Calibration involved 10 patients, and an 81-year-old female test case was used for FEM customization and pullout simulation validation. Calibration yielded a root mean square error of 74.7 mg/cm3 for HU. The simulation accurately replicated the experimental pullout test with a force of 565 N, highlighting the method’s potential for optimizing biomechanical performance for pelvic fixation.

Date: 2024
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DOI: 10.1080/10255842.2023.2280764

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