<prompt> Not a sign of Right atrial enlargement:Prominent right heart border with increased convexity PA viewProminent anterosuperior part of cardiac shadow lateral viewObliteration of retrosternal clear space Lateral viewHaffman-Rigler Sign Lateral view  <response>: Haffman-Rigler sign - Horizontal distance of greater than 1.8cm between posterior aspect of IVC and Posterior border of heart - Sign of Left Ventricular enlargement. 