Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded without focal opacities . Minimal prominence of the central vasculature is observed . The heart size is top normal . Calcifications are noted in the aortic knob . The hilar contours are unremarkable . There is a tiny right - sided pleural effusion . There is no left - sided pleural effusion or pneumothorax .
    OUTPUT:
    
Small right - sided pleural effusion . Minimal prominence of the central vasculature may represent mild congestion .