1. A method for detecting anatomic landmarks of a left ventricle (LV) in a magnetic resonance (MR) long axis image slice, comprising: detecting a plurality of apex candidates in the MR long axis image slice using a trained apex detector; detecting a plurality of base plane candidates in the MR long axis image slice using a trained base plane detector; generating a joint context for each apex-base plane candidate pair; and determining a best apex-base plane candidate pair based on the generated joint context using a trained joint context detector.