Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is re - demonstrated . The mediastinal and hilar contours are unchanged . Low lung volumes are present with mild crowding of bronchovascular structures , but no overt pulmonary edema . Patchy atelectasis is noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with patchy bibasilar atelectasis .