Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear aside from a small amount of bilateral lower lobe atelectasis . There is no evidence of pneumonia , pneumothorax , or pleural effusion . Cardiac silhouette is normal in size . The left hemidiaphragm is noted to be chronically elevated . Calcifications of the anterior longitudinal ligament are seen on the lateral view along with degenerative changes , unchanged .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .