University of Twente Student Theses


Automation and standardization of the 3D workflow in lower limb realignment surgery

Linden, S.J.F. van der (2022) Automation and standardization of the 3D workflow in lower limb realignment surgery.

[img] PDF
Abstract:Introduction: Lower limb deformities can lead to osteoarthritis and impaired function of the knee. An osteotomy can be performed to relieve the injured knee compartment and improve the function. In the challenging cases like large deformities or multiplane deformities, 3D-planning of the osteotomy can increase the correction accuracy. However, this process is not yet standardized and automated in the UMC Utrecht. Therefore, this study aims to develop a standardized and automated process. Method: Semi-automatic algorithms were developed for deformity analysis, virtual osteotomy planning, and patient specific instrumentation (PSI) design. Intra- and interobserver variability were calculated to validate the deformity analysis algorithm. Moreover, intraclass correlation coefficients were computed for the angles of the lower limb. Furthermore, intra-observer variability was calculated for manual landmark detection. The accuracy of the virtual osteotomy algorithm was calculated by comparing a desired lower limb geometry to the achieved geometry after correction. The PSI algorithm is evaluated by visual inspection and several measurements of the PSI. Results: Overall, perfect agreement was achieved. The intra-observer variability of manually placed landmarks was higher when compared to semi-automatic algorithm. Mean virtual osteotomy accuracy ranged between 0.01 ± 0.04° and 0.14 ± 0.16°. Visual inspection and measurements of the PSI indicated that all design requirements were met. Conclusion: In this study the 3D-workflow for the use of 3D technology in osteotomies around the knee was protocolized and automated. This was achieved through the development of several algorithms for deformity analysis, virtual osteotomy, and PSI design.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Technical Medicine MSc (60033)
Link to this item:
Export this item as:BibTeX
HTML Citation
Reference Manager


Repository Staff Only: item control page