Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacities in the left upper lobe are new and right lower lobe opacities have improved since ___ . The lungs are hyperexpanded . The cardiac and mediastinal contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Opacities in the left upper lobe are new and right lower lobe lobe opacities have improved . These findings could represent pneumonia in the correct clinical setting .