Not a sign of Right atrial enlargement:
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.
Prominent right heart border with increased convexity (PA view)
Prominent anterosuperior part of cardiac shadow (lateral view)
Obliteration of retrosternal clear space (Lateral view)
Haffman-Rigler Sign (Lateral view)