Cardiac segmentation is very important for clinical diagnosis. As it will help doctors forthe diagnosis and treatment of the early of cardiovascular disease by accuratly extracting theregion and the edge of the chamber, then building the3D or4D model. Clinically, doctorsusually have to manually sketch the outline of the heart cavity. Though now somesemi-automatic or fully automatic segmentation method has been used, it still faces manydifficulties in practical application.This paper proposes a segmentation ...