Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Examination is suboptimal due to underpenetration . There has been slight improvement in the right lower lobe opacity . New left lower lobe opacity has developed . Heart size is top normal . There are no significant pleural effusions or pneumothorax .
    OUTPUT:
    
1 . Decreased right lower lobe opacity , which may represent atelectasis or pneumonia . 2 . New left lower lobe atelectasis .