Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable and within normal limits . The aorta is tortuous as before . There are very small pleural effusions , left greater than right . There is no appreciable pneumothorax . Bilateral pulmonary opacities are improved from the prior examination . Opacity at the left base may represent atelectasis or scarring .
    OUTPUT:
    
Bilateral airspace opacities are improved from the prior examination done ___ . Very small bilateral pleural effusions . No appreciable pneumothorax .