Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Lungs are clear . Pulmonary vasculature is normal . There is minimal blunting of the right costophrenic sulcus posteriorly suggestive of a trace pleural effusion . No left - sided pleural effusion is identified , and there is no pneumothorax . No acute osseous abnormalities seen .
    OUTPUT:
    
Trace right pleural effusion .