Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are slightly low and there is mild bibasilar atelectasis . The lungs are otherwise clear . Cardiomediastinal silhouette is unremarkable . There is no pneumothorax or pleural effusion . Visualized osseous structures are unremarkable . A small hiatal hernia is seen .
    OUTPUT:
    
No acute cardiopulmonary process .