Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All the monitoring and support devices are unchanged and in standard position . Lung volume is low , but with markedly improved ventilation of the bases and reduced bilateral atelectasis , more evident on the left . There is no pleural effusion . Cardiomediastinal silhouette is unchanged . There is no pneumothorax .
    OUTPUT:
    
Improved lung base ventilation with reduced atelectasis . All the monitoring devices are unchanged .