Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article 2D-3D Registration of CT Vertebra Volume to Fluoroscopy Projection: A Calibration Model Assessment | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 806094 8 pages doi 2010 806094 Research Article 2D-3D Registration of CT Vertebra Volume to Fluoroscopy Projection A Calibration Model Assessment P. Bifulco 1 M. Cesarelli 1 R. Allen 2 M. Romano 1 A. Fratini 1 and G. Pasquariello1 1 Department of Biomedical Electronic and Telecommunication Engineering University of Naples Federico II 80125 Napoli Italy 2Institute of Sound and Vibration Research University of Southampton Southampton S0171BJ UK Correspondence should be addressed to P. Bifulco pabifulc@ Received 28 April 2009 Accepted 22 May 2009 Recommended by João Manuel R. S. Tavares This study extends a previous research concerning intervertebral motion registration by means of 2D dynamic fluoroscopy to obtain a more comprehensive 3D description of vertebral kinematics. The problem of estimating the 3D rigid pose of a CT volume of a vertebra from its 2D X-ray fluoroscopy projection is addressed. 2D-3D registration is obtained maximising a measure of similarity between Digitally Reconstructed Radiographs obtained from the CT volume and real fluoroscopic projection. X-ray energy correction was performed. To assess the method a calibration model was realised a sheep dry vertebra was rigidly fixed to a frame of reference including metallic markers. Accurate measurement of 3D orientation was obtained via single-camera calibration of the markers and held as true 3D vertebra position then vertebra 3D pose was estimated and results compared. Error analysis revealed accuracy of the order of degree for the rotation angles of about 1 mm for displacements parallel to the fluoroscopic plane and of order of 10 mm for the orthogonal displacement. Copyright 2010 P. Bifulco et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the .
