Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All the monitoring devices are unchanged . Lung volumes are slightly increased . Improved right base ventilation for minimal reduction of atelectasis . Heart is still enlarged with aorta elongated for aortosclerosis . The patient is after cardiac surgery . There is no pneumothorax .
    OUTPUT:
    
Mild improvement of lung ventilation , especially right base for reduced atelectasis .