**4. Conclusion**

Generally, real brain MR images result from the CSF near the skull, which tends to be close to the boundary in the image. In vector seed selection, seeds tend to appear in more smooth regions. Hence, seeds will not be generated from the pixel vectors in the CSF close to the boundary, which further results in that these tissues are covered by the neighboring grayscaled tissues in the stage of region growing, and the classification is thus failed. Consequently, this paper improved the method of region growing and successfully applied vector seeded region growing to the classification of brain MR images.
