Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval improvement of the right lower lobe airspace opacity and mild interstitial edema . Stage linear opacity radiating from the left hila with elevation and peaking of the left hemidiaphragm , suggestive of left upper lobe volume loss from prior surgery . No pneumothorax or pleural effusions . Bilateral prior thoracotomy with chest wall deformities .
    OUTPUT:
    
Interval improvement of both possible right lower lobe pneumonia and mild interstitial edema .