Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal and hilar contours are unremarkable and unchanged . Lungs are clear and mildly hyperinflated . No focal consolidation is identified . Minimal blunting of the left costophrenic angle on the posterior view may suggest a trace left pleural effusion . No right - sided pleural effusion is demonstrated , and there is no pneumothorax . No acute osseous abnormalities are present .
    OUTPUT:
    
Blunting of the costophrenic angle posteriorly on the left suggesting a trace pleural effusion . No pneumonia .