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 is within normal limits . Mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Except for minimal atelectasis in the lung bases , the lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .