Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is re- demonstrated with enlargement right atrial heart border . Unchanged mediastinal and hilar contours with the main pulmonary artery remaining enlarged . Lung volumes are lower compared to the prior exam with mild pulmonary vascular engorgement demonstrated . Additionally there are minimal patchy bibasilar opacities which could reflect atelectasis . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
Mild pulmonary vascular engorgement and bibasilar patchy opacities , likely atelectasis in the setting of low lung volumes .