The living standard of people has been raised continuously. They focus more on their health. Illness is checked out early and cured in time, which is not only saving patients’lives and relieving patients’pain, but also lightening patients’burden. Medical images have the advantage of efficient, economic and noninvasive, so they are used widely in medical treatment activity. The medical image is an indispensable part of modern medicine. The quality of medical images directly related to the accuracy of doctors...