Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Lungs are clear . There is minimal blunting of the left costophrenic sulcus suggestive of a trace left pleural effusion . No right - sided pleural effusion is present . There is no pneumothorax . No acute osseous abnormalities detected .
    OUTPUT:
    
Small left pleural effusion . Otherwise , no acute cardiopulmonary abnormality .