Segmentation of abnormal liver using adaptive threshold in abdominal CT images

It is easy to segment the liver with existing methods using both basic place information (the liver exists on the left of the abdominal CT image) and distribution information of regular gray values. However, the existing methods can not be used for segmenting an abnormal liver. Because the gray values of lesions do not show the original gray values of the liver, lesion parts of the abnormal liver are not regarded as the liver in the existing methods. In this study, we use the adaptive threshold in each slice and the angle line method for the segmentation of the abnormal liver in abdominal CT images.