Fig. 2

Minimal teaching and training in left ventricular delineation, as in the current study, may lead to a direction of increased accuracy, i.e. decreased bias (left) but not necessarily higher precision, i.e. lower variability (right) for beginners. The graphs show pooled left ventricular data in absolute values for both complete beginners (open circles, dashed lines) and the intermediate beginner (solid circles and lines) before and after teaching