Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The lungs are hyperexpanded but clear , with no focal opacities . There is no pneumothorax . The degree of blunting of the left costophrenic angle has increased slightly as compared to the prior . This likely represents pleural thickening though pneumonia not escluded . The cardiomediastinal hilar contours are unchanged .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Hyperexpanded lungs consistent with emphysema . 3 . Subtle increase in opacity at the left costophrenic angle , likely represents pleural thickening versus pneumonia . F / u to resolution .