提出了一种利用双平面正交投影重建血管截面的方法。该方法中应用加权距离作为度量相邻截面相似性的测度，并通过对网流理论中最小费用流算法的改进来最优化该相似性测度；在此基础上还引进截面连通性约束，利用随机数来获得最连通截面；实验结果表明应用该方法可以得到在投影约束下与给定模型最相似最连通的截面。 A new method of reconstructing blood vessel cross-section using bi-plane orthogonal projection is proposed. This method uses the weighted distance as a measure of the similarity of adjacent sections and optimizes the similarity measure by improving the minimum cost flow algorithm in the theory of network flow. Based on this, the cross-sectional connectivity constraint is also introduced, The experimental results show that the cross section with the most similar and most connected to the given model under projection constraint can be obtained by using this method.