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A SEGMENTATION PROBLEM IN QUANTITATIVE ASSESSMENT OF ORGAN DISPOSITION IN RADIOTHERAPY

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Figure

Fig. 1. Three dimensional view of anatomical volumes manually contoured for a radiotherapy treatment in the head and neck region
Fig. 3. Non-linear diffusion filter, (A) resized CT image; (B) filtered image, we can observed that now the image is “piecewise smooth”.
Fig. 4. Example of contour evolution, the black line represents the initial front; red and green lines are some of the fronts at intermediate times; the blue line is the final contour.
Fig. 5. Example of bladder segmentation by using different slice from CT data for a patient
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