Springer International Publishing AG;Berlin/Heidelberg: Springer Berlin Heidelberg
摘要:
摘要： C-arm-image-assisted navigation systems for orthopedic surgery have been applied clinically for several years. Pedicle screw implantation is one of the important applications. A precise definition of a C-arm X-ray projection model is the key requirement for a C-arm-assisted navigation system. This study proposes using a high-pass filter to extract the contour of large markers of the image calibrator and an adaptive threshold method to segment images of small markers, thus improving the overall recognition rate of markers and enhancing the robustness of image calibration. A method for time synchronization of X-ray imaging and the detection of a patient’s lumbar position data for respiration compensation is also proposed. Positioning accuracy evaluation of the developed C-arm-assisted navigation system was carried out clinically. The results show that the mean positioning error is 2.409 mm and that the mean direction error is 1.449°. 其他題名： J. Med. Biol. Eng 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2016-02 出處： Journal of medical and biological engineering, 2016-02, Vol.36 (1), p.44-52 版權： Taiwanese Society of Biomedical Engineering 2016 識別號： ISSN: 1609-0985 識別號： EISSN: 2199-4757 識別號： DOI: 10.1007/s40846-016-0107-2
