Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is borderline enlarged . The mediastinal hilar contours are within normal limits . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . Faint patchy opacity is noted within the right upper lung field , which could reflect an area of developing infection . No acute osseous abnormality is detected .
    OUTPUT:
    
Faint patchy right upper lung field opacity which could reflect an area of developing infection .