Single-plane Coronary Angiography Reconstruction And Quantitative Analysis

Coronary angiography is the most effective method in cardiovascular diseasediagnoses. However the two-dimensional imaging mode makes it hard to understand theimages and restricts quantitative analysis. Three-dimensional (3-D) reconstructionprovides new approach for clinical diagnoses and therapy. It offers realistic andintuitionistic coronary arterial structure which would be convenient for physicians tolocate disease and perform precise parameter measurement. Reconstruction of imagessequences will help exploit information, evaluate vascular motion parameters and researchheart motion.The paper analyzes the reconstruction principle of two views and various errorsaffecting precision and then puts forward an optimization method satisfying followinganalysis requirement. To portray the artery, the paper uses ellipse to fit cross-section ofartery with radius information extracted from two angiogram used in reconstruction.Quantitative coronary angiography includes2-D QCA and3-D QCA. Based onangiographic images, the narrow degree is calculated.3-D vessel length, bifurcation angle,volume are calculated after reconstruction. The VTK package is used to build aninteractive quantitative analysis module and a method to obtain optimal view angle basedon3-D scene is realized.Based on sequence reconstruction we could analyze coronary artery motionqualitatively and quantitatively. Finally, we put forward a method to calculate localmotion from reconstructed sequence to enrich coronary model.