Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior examination there are persistent improved areas of scattered basilar atelectasis . There are no new focally occurring opacities concerning for pneumonia . There are probable trace bilateral effusions . There is no evidence of pneumothorax . The cardiomediastinal and hilar contours are stable , with heart normal in size . Pulmonary vascularity is normal .
    OUTPUT:
    
No acute cardiopulmonary process .