Significant changes in lower limb alignment due to flexion and rotation-a systematic 3D simulation of radiographic measurements.

ABSTRACT:

Background

Many radiographic lower limb alignment  measurements are dependent on patients' position, which makes a standardised image acquisition of long-leg radiographs (LLRs) essential for valid measurements. The purpose of this study was to investigate the influence of rotation and flexion of the lower limb on common radiological alignment parameters using three-dimensional (3D) simulation.

Methods

Joint angles and alignment parameters of 3D lower limb bone models (n = 60), generated from computed tomography (CT) scans, were assessed and projected into the coronal plane to mimic radiographic imaging. Bone models were subsequently rotated around the longitudinal mechanical axis up to 15° inward/outward and additionally flexed along the femoral intercondylar axis up to 30°.

SUBMITTER: Brunner J 

PROVIDER: S-EPMC10050026 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature