Semi-automatic segmentation

The other way to segment lesion is semi-automatic. First, you have to clic in the middle of the lesion (Be careful to be in select a 2D slice interaction mode). Then, you select the label color. Then you have to press the Region Growing button (see figure 6.12). A 3D regions will appear quickly with the same color than the one you choose. See figure 6.13 for a step by step procedure description.

Figure 6.12: Region growing button.

Figure 6.13: Step by step procedure for Region Growing segmentation.

Clic in the middle of a lesion that you want to segment (Be careful to be in select a 2D slice interaction mode).

Select the label color and press the Region Growing button.

A 3D regions will appear on all the images (you can change of slice to see the 3D region).

This segmentation method is still underdevelopment and may not work perfectly at the beginning (see next section to know how to improve the obtained segmentation).