Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest . Tracheostomy tube ends 4 .2 cm from the carina . Right PICC line ends in the low SVC . Left pacemaker leads are in appropriate position . Prosthetic cardiac valves are unchanged . Sternotomy wires and mediastinal clips are unchanged . Large left pleural effusion is unchanged . There is mild improvement in aeration of the right lung . Still mild pulmonary edema persists and cardiomegaly is unchanged .
    OUTPUT:
    
Slightly better aeration of the right lung . Persistent bilateral pleural effusions , large on the left and small - to - moderate on the right .