Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new right infrahilar opacity , concerning for right middle lobe pneumonia . There is mild pulmonary vascular congestion , though no overt interstitial edema . There is no pneumothorax . Mediastinal and hilar contours are within normal limits . The heart size is normal . There is no pleural effusion . Flattening of the hemidiaphragms and increased AP diameter of the chest is consistent with chronic obstructive pulmonary disease . Linear hyperdensity over the left mid chest may reflect something outside of the patient as this is only seen on the frontal projection .
    OUTPUT:
    
Probable right middle lobe pneumonia