Figure 14a. Usefulness of epicardial views. (a) VR image from CT performed in a patient with a nondilated left atrium (left atrial volume = 52 mL) demonstrates normal pulmonary venous anatomy, with right superior and right inferior ostial branches (arrows). (b) VR image (epicardial view) from multi-detector row CT performed in a patient with a dilated left atrium (left atrial volume = 181 mL) depicts a left common vein (LCV).