Four dimensional Watershed Transform

8 neighborhood connectivity was used to generate Meyer's watershed transform

  From Peter J. Yim et al's "High-Resolution Four-dimensional Surface Reconstruction of the Right Heart and Pulmonary Arteries," Proceedings of SPIE, Medical Imaging 98.

Application of interactive Meyer Watershed.   Results of  4-D interactive Meyer watershed segmentation of chamber of right ventricle of canine heart in Dynamic Spatial Reconstructor (DSR) image at end diastole (left) and end systole (center).  16 frames of a 100x100x100  image segmented based on user-supplied markers designating exterior and interior of chamber in single slice  with minor markings in two other slices.   (Binary segmentation image mildly blurred prior to iso-surface 3D visualization.)  White arrors indicate location of tricuspid valve and black arrow indicates band of muscle.  Second view (right) of end systole.  Groove between inflow and outflow region clearly visible.