Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size and cardiomediastinal contours are normal . Coronary artery stent is in stable position . Increased AP diameter of chest is consistent with emphysema . No focal consolidation , pleural effusion , or pneumothorax . Previously seen nodular opacity in the right upper lobe is not appreciated on the current exam and was likely artifactual .
    OUTPUT:
    
Previously seen nodular opacity is not well appreciated and may have been artifactual .