Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is rotated rightward somewhat limiting the evaluation . Within these limitations , the lungs are relatively well expanded . There is no definite focal airspace opacity to suggest pneumonia . There is no large pleural effusion or pneumothorax . Bibasilar opacities likely reflect atelectasis seen on prior CT . The heart is not enlarged . Although difficult to evaluate , the mediastinal and hilar contours are likely stable .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality .