Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . Heart size is mildly enlarged , unchanged . Mediastinal and hilar contours are unremarkable . Crowding of bronchovascular structures is present without overt pulmonary edema . Atelectasis is noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is seen . Elevation of the right hemidiaphragm is unchanged .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .