Coronary Artery Center-Line Extraction Using Second Order Local Features
Figure 4
(a) A semicircular profile (in red) and its starting point indicated by the small arrow. (b) The graph of the vesselness values calculated for the points of semicircular profile drawn in (a). (c) The direction values of eigenvector (based on four-quadrant inverse tangent) calculated for the points on the semicircular profile drawn in (a).
