Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a faint opacifications in the left lower lobe that may represent pneumonia in the proper clinical setting . The heart size is top normal . There is no pleural effusion or pneumothorax . The hilar and mediastinal contours are within normal limits .
    OUTPUT:
    
Left lower lobe consolidation may represent pneumonia in the proper clinical setting . Otherwise , this most likely represents atelectasis .