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Proceedings Paper

3D watershed transformation on graphs
Author(s): Susan Wegner; Helmut Oswald; Eckart Fleck
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Paper Abstract

A 3D multiresolution segmentation approach based on a hierarchical watershed transformation (WST) on graphs for Computer Tomography images is presented. This approach is a 3D extension of the 2D WST on graphs which has already been successfully tested for the segmentation of CT images of the pelvis in hyperthermia planning. Analogous to the 2D technique the oversegmentation of the 3D WST is iteratively reduced through the application of the WST on graphs. Whereas for the 2D technique a stack of segmentation slices is constructed, here a stack of segmentation volumes consisting of 3D regions that correspond to 3D anatomical objects of different resolution in each volume are obtained. In contrast to the 2D approach which is at first applied on the image plane and hereinafter iteratively on graphs, the principle WST technique for graphs is now directly applied on the image plane. Besides the usage of a gradient with subpixel accuracy additionally a new procedure for the WST on this gradient is used. The labelled subpixel gradients are then used to label the voxels representing the segmentation result.

Paper Details

Date Published: 24 June 1998
PDF: 12 pages
Proc. SPIE 3338, Medical Imaging 1998: Image Processing, (24 June 1998); doi: 10.1117/12.310951
Show Author Affiliations
Susan Wegner, Deutsches Herzzentrum Berlin and Vorchow-Klinikum der Humboldt-Univ. Berlin (Germany)
Helmut Oswald, Deutsches Herzzentrum Berlin and Virchow-Klinikum der Humboldt-Univ. Berlin (Switzerland)
Eckart Fleck, Deutsches Herzzentrum Berlin and Virchow-Klinikum der Humboldt-Univ. Berlin (Germany)


Published in SPIE Proceedings Vol. 3338:
Medical Imaging 1998: Image Processing
Kenneth M. Hanson, Editor(s)

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