Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which appears moderately enlarged . Tortuosity of the thoracic aorta is again noted . Hilar contours are unremarkable . Pulmonary vasculature is not engorged . Patchy opacities are noted in the lung bases which may reflect areas of atelectasis . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
Patchy bibasilar opacities likely reflect atelectasis in the setting low lung volumes . No evidence for congestive heart failure .