Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Low lung volumes are present with minimal patchy bibasilar atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Low lung volumes with patchy atelectasis in the lung bases . No definite displaced rib fracture is identified , but if there is continued concern , a dedicated rib series may be helpful .