Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hyperinflated lungs . Right lung is clear . Rounded opacity in the left mid lung is similar to findings on chest CT . Persistent mild cardiomegaly with prominent bulge along posterior aspect of heart similar to CT chest dated ___ likely representing right atrium . No pleural effusion or pneumothorax . Mediastinal contour is otherwise unremarkable . Aortic arch calcifications are present . Visualized upper abdomen is within normal limits .
    OUTPUT:
    
1 . Hyperinflated lungs consistent with COPD and emphysema . 2 . Stable rounded opacity in the left mid lung is most consistent with atelectasis however can not exclude superimposed pneumonia in the appropriate clinical setting . Similar to CT dated ___ . 3 . Prominent bulge along posterior aspect of heart , unchanged from recent chest CT .