Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle opacity at the right base is most likely atelectasis when correlated with the CT abdomen from the same day . There is no focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . The imaged upper abdomen is unremarkable aside from the right upper quadrant drainage catheter .
    OUTPUT:
    
No acute cardiopulmonary process .