Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , PA and lateral . There is minimal heterogeneous opacity in the right lower lobe , which is a chronic finding based on multiple prior studies . On the CTA it was felt to represent a combination of air trapping and atelectasis . The lungs are otherwise clear . The heart is minimally enlarged , also unchanged . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
1 . No evidence of pneumonia or decompensated heart failure . 2 . Heterogeneous opacity in the right lower lobe is a chronic abnormality .