Accuracy Analysis of 3D Bone Fracture Models: Effects of Computed Tomography (CT) Imaging and Image Segmentation.

Autor: Bittner-Frank M; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.; Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria., Strassl A; Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria., Unger E; Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria., Hirtler L; Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria., Eckhart B; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria., Koenigshofer M; Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria., Stoegner A; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria., Nia A; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria., Popp D; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria., Kainberger F; Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria., Windhager R; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria., Moscato F; Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria.; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria.; Austrian Cluster for Tissue Regeneration, Vienna, Austria., Benca E; Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria. emir.benca@muv.ac.at.
Jazyk: angličtina
Zdroj: Journal of imaging informatics in medicine [J Imaging Inform Med] 2024 Aug; Vol. 37 (4), pp. 1889-1901. Date of Electronic Publication: 2024 Mar 14.
DOI: 10.1007/s10278-024-00998-y
Abstrakt: The introduction of three-dimensional (3D) printed anatomical models has garnered interest in pre-operative planning, especially in orthopedic and trauma surgery. Identifying potential error sources and quantifying their effect on the model dimensional accuracy are crucial for the applicability and reliability of such models. In this study, twenty radii were extracted from anatomic forearm specimens and subjected to osteotomy to simulate a defined fracture of the distal radius (Colles' fracture). Various factors, including two different computed tomography (CT) technologies (energy-integrating detector (EID) and photon-counting detector (PCD)), four different CT scanners, two scan protocols (i.e., routine and high dosage), two different scan orientations, as well as two segmentation algorithms were considered to determine their effect on 3D model accuracy. Ground truth was established using 3D reconstructions of surface scans of the physical specimens. Results indicated that all investigated variables significantly impacted the 3D model accuracy (p < 0.001). However, the mean absolute deviation fell within the range of 0.03 ± 0.20 to 0.32 ± 0.23 mm, well below the 0.5 mm threshold necessary for pre-operative planning. Intra- and inter-operator variability demonstrated fair to excellent agreement for 3D model accuracy, with an intra-class correlation (ICC) of 0.43 to 0.92. This systematic investigation displayed dimensional deviations in the magnitude of sub-voxel imaging resolution for all variables. Major pitfalls included missed or overestimated bone regions during the segmentation process, necessitating additional manual editing of 3D models. In conclusion, this study demonstrates that 3D bone fracture models can be obtained with clinical routine scanners and scan protocols, utilizing a simple global segmentation threshold, thereby providing an accurate and reliable tool for pre-operative planning.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz: