A biplanar reconstruction method based on 2D and 3D contours: application to the distal femur |
| |
Authors: | Laporte S Skalli W de Guise J A Lavaste F Mitton D |
| |
Institution: | Laboratoire de BioMécanique--ENSAM CER de Paris, 151, Boulevard de l'H?pital, 75013, Paris, France. |
| |
Abstract: | A three-dimensional (3D) reconstruction algorithm based on contours identification from biplanar radiographs is presented. It requires, as technical prerequisites, a method to calibrate the biplanar radiographic environment and a surface generic object (anatomic atlas model) representing the structure to be reconstructed. The reconstruction steps consist of: the definition of anatomical regions, the identification of 2D contours associated to these regions, the calculation of 3D contours and projection onto the radiographs, the associations between points of the X-rays contours and points of the projected 3D contours, the optimization of the initial solution and the optimized object deformation to minimize the distance between X-rays contours and projected 3D contours. The evaluation was performed on 8 distal femurs comparing the 3D models obtained to CT-scan reconstructions. Mean error for each distal femur was 1 mm. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|