Three-dimensional reconstruction of subject-specific dynamic patella of femoral joint using static magnetic resonance based methodology
WANG Xing-liang, LIU Yun-peng, XU Zhi-qing,YAO Jie,YANG Bin
Chinese Journal of Clinical Anatomy ›› 2017, Vol. 35 ›› Issue (1) : 69-73.
Three-dimensional reconstruction of subject-specific dynamic patella of femoral joint using static magnetic resonance based methodology
Objective To reconstruct the dynamic 3D motion model of patellofemoral joint based on multi-angle static magnetic resonance imaging. Methods A healthy adultmale was enrolled, whose right knee was scanned with a MR machine at 0°, 30°, 60°,90°, and 120° of knee flexion, then the MR images were imported into the Mimics in Dicom format, the shape of patella and femoral were extracted to calculate the static 3D model of patellofemoral joint at the five flexion angles. Then import the models into Rapidform at the same coordinate system to match the dynamic model using spline interpolation algorithm, and the patella tracking was calculated and compared with the experiments in literatures. Results Using static MR scanning technology could reconstruct the quasi dynamic 3D motion model of patellofemoral joint accurately and without radiation in a short time. The patellar tracking was within the range of experimental measurements which was calculated based on the dynamic model. Conclusion The dynamic 3D model of patellofemoral joint is successfully reconstructed which includes the full process of knee bending from full extension to the maximum flexion; during the flexion of knee, the patella keeps rotating and mildly flexing and tilting at the same time.
Three-dimensional reconstruction / Biomechanics / Patellofemoral joint / MRI
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