Tham khảo tài liệu 'new developments in biomedical engineering 2011 part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 232 New Developments in Biomedical Engineering Dataset Mean distance mm Root mean square error mm Best Worst Average Table 2. Results of the registration method on clinical datasets. 4. Conclusion In this chapter we present a novel method for tubular organs registration based on the automatically detected bifurcation points of the tubular organs. We first perform a 3D tubular organ segmentation method to extract the centerlines of tubular organs and radius estimation in both planning and respiration-correlated CT images. This segmentation method automatically detects the bifurcation points by applying Adaboost algorithm with specially designed filters. We then apply a rigid registration method which minimizes the least square error of the corresponding bifurcation points between the planning CT images and the respiration-correlated CT images. Our method has over 96 success rate for detecting bifurcation points. We present bery promising results of our method applied to the registration of the planning and respiration-correlated CT images. On average the mean distance and the rootmean-square error RMSE of the corresponding bifurcation points between the respiration-correlated images and the registered planning images are less than mm. 5. References Aylward S. Bullitt E. 2002 . Initialization noise singularities and scale in height ridge traversal for tubular object centerline extraction IEEE Transactions on Medical Imaging 21 2 61-75. Aylward S. Jomier J. Weeks S. Bullitt E. 2003 . Registration and analysis of vascular images International Journal of Computer Vision 55 123-138. Baert S. Penney G. van Walsum T. Niessen W. 2004 . Precalibration versus 2d-3d registration for 3d guide wire display in endovascular interventions MICCAI 3217 577584. Binaghi S. Maeder p Uské A. Meuwly . Devuyst G. Meuli R. 2001 . Threedimensional computed tomography angiography and magnetic resonance angiography of carotid bifurcation stenosis European
