Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no concerning focal airspace opacity . There is slight blunting of bilateral costophrenic sulci , likely due to atelectasis . The cardiomediastinal silhouette and hilar contours are normal . The heart is not enlarged . The aorta is somewhat tortuous . No large pleural effusion is detected . There is no pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality . No focal airspace opacity to suggest pneumonia .