Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged with heart size is within normal limits . Pulmonary vasculature is normal . No focal consolidation or pneumothorax is seen . Minimal blunting of the left costophrenic sulcus on the frontal view suggests a trace pleural effusion . No right - sided pleural effusion is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Probable trace left pleural effusion . Otherwise no acute cardiopulmonary abnormality .