Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is stable . An opacity at the right lung base likely represents atelectasis and adjacent eventration of the diaphragm , not significantly changed from multiple prior examinations . Lungs remain markedly hyperexpanded . Vascular calcifications are dense . There is no evidence of pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .