Figure 1

Results comparison of different initial contour. Figure. 1. (a) The original MR image. (b)an appropriate initial contour close enough to the brain surface. (c) satisfactory segmentation result only after 20 iterations with the initial contour of (b). (d) the binary image of the head with threshold t which can roughly separate brain tissue from non-brain tissue. (e)an inappropriate initial contour far away from the brain surface. (f) unsatisfactory segmentation result only after 20 iterations with the initial contour of (e).