Biplane imaging from the MV commissural view. Using simultaneous biplane imaging with the mid-oesophageal MV commissural view as the primary image, a sweep of the entire commissure can be performed. (A) The position of the orthogonal image (white arrow) at the lateral commissure (A1-P1 scallops). (B) The position of the orthogonal image at the midline (A2-P2 scallops) where a small flail posterior scallop is imaged (yellow arrow). (C) The position of the orthogonal image at the medial commissure (A3-P3 scallops). MV, mitral valve.