Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are better expanded compared to the previous study . Heart is normal in size and cardiomediastinal contours remain unremarkable . Mild plate - like atelectasis is seen projecting over both bases . There is no area of focal consolidation to suggest pneumonia . No pleural effusions and no pneumothorax .
    OUTPUT:
    
Bibasilar atelectatic changes , but no evidence of pneumonia .