Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vascularity is normal . The lungs are clear . There is minimal blunting of the left costophrenic angle posteriorly on the lateral view which may indicate a tiny pleural effusion . No right - sided pleural effusion or pneumothorax is identified . No acute osseous abnormalities are identified . Prior right AC joint separation is re - demonstrated .
    OUTPUT:
    
Possible minimal trace left pleural effusion . Otherwise no acute cardiopulmonary abnormality .