Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . The heart is moderately enlarged . There is a small right pleural effusion . The right lung is clear . There is mild retrocardiac opacity which likely represents mild basal atelectasis . Mediastinal contour is normal . There are midline sternotomy wires and mediastinal clips noted . Bony structures are intact .
    OUTPUT:
    
Cardiomegaly , tiny right effusion and retrocardiac opacity likely atelectasis .