Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Pacemaker and midline sternotomy wires again noted without change in position . There is calcification overlying the left heart likely mitral annular . Cardiomegaly is again noted . Hila are congested and there is mild interstitial pulmonary edema . Right basal opacity is again noted most compatible with atelectasis , difficult to exclude an early pneumonia . There is increased retrocardiac opacity which could represent development of pleural effusion with probable atelectasis , also difficult to exclude pneumonia . No large pneumothorax . Bony structures appear intact .
    OUTPUT:
    
Cardiomegaly , hilar congestion , mild interstitial pulmonary edema , bibasilar atelectasis , probable left pleural effusion . Difficult to exclude basal pneumonia .