Кафедра біомедичної інженерії (БМІ)

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https://openarchive.nure.ua/handle/document/52

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Перегляд Кафедра біомедичної інженерії (БМІ) за темою "3D modeling"

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  • Зображення мініатюри
    Публікація
    3D modeling, errors sources, internal map, optical detection, surgical navigation system
    (American Scientific Publishers, 2015) Аврунін, О. Г.; Alkhorayef, M.; Saied, H. F. I.; Tymkovych, M.
    Several causes of spatial errors in surgical navigation system have been investigated for several systems. These include identification error of the external features used for registration, geometrical distortion in the preoperative images, and tracking error of the surgical instruments. Another potentially important source of error is the patient head position detection retrospectively and concurrent with surgery. The visualization of target zone is carried out according to reference landmark points inside the center of the brain as well as an automatic algorithm for contour recognition (based on 3D segmentation and computer morphometry) was applied to edge the contour. Moreover, the optical navigation system was used to assess the accuracy of determination the position of the surgical instrument inside patient head construction using the "internal map" describing the anatomy of the brain. The major sources of errors occurring in the unit of position detection of the optical navigation system were considered. Furthermore, parts of the errors that could appear were simulated while operating the surgical navigation system. Eventually the research included the possibility of using different filters depending on natural source of noise that was also simulated and analyzed.
  • Зображення мініатюри
    Публікація
    Компьютерное планирование пластических вмешательств методом деформации полигональной модели лица человека
    (НПП ЧП «Технологический Центр», 2013) Книгавко, Ю. В.
    The article presents the results of the development of the method of preoperative computer planning of surgical intervention on a human face to improve functional and aesthetic characteristics, which accelerates the planning process. The described method of the computer planning is based on the principle of three-dimensional modeling of polygonal models of the facial part of a person, using photogrammetry data or results of processing of the digital data of tomographic study of patient’s head. We have described the structural scheme of the software product and discussed some aspects of the development, permitting to implement effectively in real time the extrusive and intrusive deformations of the corresponding polygonal models, and to carry out the accompanying three-dimensional visualization. During the development when calculating the transformations of the rendered model we used the methods of polygonal representation of tomographic data, the method of spatial modeling of anatomical structures, the methods of linear algebra and analytical geometry. The result of the development is the creation of a new software product that can be used to optimize the procedure for solving a number of problems of computer planning in various areas of plastic medicine. Thus, the results of the work on a new method of computer planning of surgical intervention on the human face make it possible to optimize the solution of the problem.