Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior chest x-ray , there has been clearing of the contusion in the left upper lobe . There is loss of the left hemidiaphragm and volume loss in the left lower lobe is present . The right lung is clear . Some atelectasis at the right base is present .
    OUTPUT:
    
Clearing of left upper lobe , volume loss left lower lobe . Position of support lines unchanged .