Best-Quality Vessel Identification Using Vessel Quality Measure in Multiple-Phase Coronary CT Angiography

Figure 3

LCA trees from Figure 2 which are automatically registered by using nonlinear CBSO and AQSO methods [12]. The coronary trees in phases 70% and 80% were registered first (70%-80%). Then by using the CBSO method the coronary tree in phase 75% was registered to 70%-80% to obtain the 70%-80%-75% tree. By following the same approach the coronary trees in phases 45% and 50% were also registered (45%-50%). Again, by using the CBSO method, the coronary tree in phase 40% was registered to 45%-50% to obtain the 45%-50%-40% tree. The 45%-50%-40% tree was then registered to the 70%-80%-75% tree by using the AQSO method followed by the CBSO method. In the image, the reference (unwrapped) coronary tree is shown in red, the warped coronary tree in white, and the overlap between the trees in green.