Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume , complicating evaluation . Within these limitations , there is mild linear atelectasis in both lungs . The cardiomediastinal silhouette and hilar contours are normal . No definite pleural effusion or pneumothorax is present . Bilateral humeral prostheses are noted .
    OUTPUT:
    
Low lung volumes with mild linear atelectasis bilaterally .