Fig. 5

a Comparison of RCCA vessel dimensions obtained from two segmentation methods with known cast geometry. Vessel surface reconstructed from the local threshold segmentation (straight line) showed good agreement between the vessel geometry and the cast dimension. Vessel surface reconstructed from the global threshold segmentation (dashed line) significantly underestimated the cast dimensions. b RCCA vessel wall thickness within the cast region obtained from the local threshold segmentation (straight line) corresponded to that of the normal vessel wall thickness. Vessel surface reconstructed from the global threshold segmentation (dashed line) significantly overestimated the vessel wall thickness