FIG. 3.

Example of chunk-based segmentation refinement (CBR). (a) Coronal slice of CT volume showing liver and adjacent vena cava inferior imaged with similar gray-values. The border between these two objects can be barely seen. (b) Initial graph cut result composed of chunks. (c) CBR result after two chunks have been removed—the leak has been successfully removed with a minimal amount of user interaction. Note that disconnected chunks are removed automatically. For (b) and (c) a point-rendering method is used for visualization of volume chunks.