In cases where there is no CT or MRI scan, or part of bone is missing, such three-dimensional polygonal models are difficult to create. For such purposes, 3D polygonal models of bones are usually created based on Computer Tomography (CT) or Magnetic Resonance Imaging (MRI) data. Geometrically accurate and anatomically correct three-dimensional geometric models of human bones or bone sections are essential for successful pre-operative planning in orthopedic surgery. The obtained model can be used for further improving the reverse engineering process, for simulation and training in orthopaedists, creating customized bone implants, as well as for obtaining parametric model of the human hip bone. Finally, merging of these complex surfaces gives 3D surface model. These reference geometric entities were used to create planes of intersection and axes, resulting in the sets of curves and splines.By use of CAD programs, from these splines complex surfaces were created. Taking into account the complexity of the hip bone to obtain a valid model, it was necessary first of all to identify and define the anatomical and morphological characteristics which correspond to the referential geometric entities. Input data, obtained with Toshiba MSCT scanner Aquillion 64 from real hip bone, were converted to a polygonal model, which represents initial model for further modelling in CAD program. The objective of this study is to create preliminary 3D model of human hip bone, using the method of anatomical features. This research enhances the overall understanding of the mesentery and Toldt’s fascia in the human specimen which is necessary for medical device innovations for colorectal surgical procedures. A denser point cloud detailing the mesenteric boundaries could be used to address this.Įxpert anatomical and surgical insight and point cloud data modelling methods can be used to model soft tissues. The thickness of the mesentery could not be accurately determined as point cloud data do not have thickness. We generated a point cloud dataset using cryosection images as the target anatomy is more visible than in CT or MRI images. The mesentery was used to indicate the location of Toldt’s fascia. We modelled the peritoneum and the mesentery. The models created were used to inform the design of a novel medical device to separate the mesocolon from the retroperitoneum during resection of the colon. The aim of this research was to develop a methodology to model non-intestinal colorectal tissues that are not readily identifiable radiologically to enhance contextual understanding of these tissues and inform medical device design. Accurate modelling of these tissues can be difficult with current medical imaging technology. There is a paucity of methods to model soft anatomical tissues.
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December 2022
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