Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Elevation of the right hemidiaphragm is of unknown chronicity . Mild enlargement of cardiac silhouette is present . The mediastinal and hilar contours are unremarkable given the presence of low lung volumes . Crowding of bronchovascular structures is present without overt pulmonary edema . Patchy opacities in the lung bases likely reflect areas of atelectasis . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Elevation of the right hemidiaphragm of unknown chronicity .