Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiographs obtained ___ , no significant changes are appreciated . Enlargement of the bilateral pulmonary arteries unchanged since at least ___ . Heart size is normal without pulmonary vascular congestion or pulmonary edema . Lungs are fully expanded and clear without focal consolidation or suspicious pulmonary nodules . Increased AP diameter and flattening of the diaphragms suggestive of chronic obstructive pulmonary disease . No pleural abnormalities . Extensive degenerative changes throughout the thoracic spine and thoracolumbar kyphosis are grossly unchanged .
    OUTPUT:
    
No radiographic evidence pneumonia or other acute cardiopulmonary abnormalities .