Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Baseline diffuse parenchymal abnormality characterized by fine reticular interlobular septal thickening is compatible with emphysema . A rounded opacity projecting over the heart is unchanged , and most likely due to atelectasis . Right lower lobe linear atelectasis or scarring is also unchanged . There is no new consolidation or pleural effusion . There is no pneumothorax . Spinal degenerative changes and generalized osteopenia are stable . Metallic clips in the right upper quadrant denote prior cholecystectomy .
    OUTPUT:
    
No acute pulmonary disease .