A simple determination system for optimal angiographic viewing angles and QCA parameters

In quantitative coronary angiography (QCA), quantification parameters of the coronary arteries are determined using two dimensional (2D) projections of the three dimensional (3D) vessel structures. Unfortunately, the results of this quantification depend on the viewing angles corresponding with the used projections. To deal with this viewpoint dependency, multiple computer systems have been developed to determine the optimal angiographic viewing angles, the angles corresponding with the viewpoints perpendicular to the vessel segments of interest, which are the best possible viewpoints to perform QCA. We developed a system that determines the optimal viewpoints and QCA parameters without creating a reconstruction. Hence the proposed system is very simple and fast. The variation and deviation on results obtained using images of static phantoms are much smaller the inaccuracies due to the movements of the arteries