1. A method for left ventricle (LV) detection in a 2D magnetic resonance imaging (MRI) image, comprising: detecting a plurality of LV candidates in the 2D MRI image; detecting a plurality of apex candidates in the 2D MRI image; detecting a plurality of base candidates in the 2D MRI image; and selecting one of the plurality LV candidates using component-based voting based on each of the plurality of LV candidates, the plurality of apex candidates, and the plurality of base candidates.