Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate severe emphysema with distortion of pulmonary architecture . The cardiomediastinal silhouette is unchanged , demonstrating a calcified and tortuous aorta , with a heart which is normal in size . Oher than chronic mild bibasilar atelectasis , lungs are clear . Again seen are old right lateral rib fractures with associated traumatic pleural thickening . Small bilateral pleural effusions are either chronic or recurrent . There is no pneumothorax .
    OUTPUT:
    
1 . Other than chronic mild bibasilar atelectasis , the lungs are clear without evidence of pneumonia . 2 . Small bilateral pleural effusions are either chronic or recurrent .