Figure 1From: A simplified guide ruler from numeric table method in doing rotational osteotomy The computer model of rotational osteotomy from CT. The original CT slice is shown. (a) On the left top, we choose the interest region (around femur). (b) The right top shows the result of image processing. (c) The computer binarizes the picture, removes the isolated pixels, fills the medullary canal, and then calculate the gravity center and the errors.Back to article page