Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New patchy airspace opacity in the right lung base partially obscuring the right hemidiaphragm is seen only in the frontal radiograph . Scarring in the left upper ___ is unchanged . Mild prominence of the pulmonary interstitium suggests pulmonary vascular congestion . No pleural effusion or pneumothorax is seen . The cardiomediastinal and hilar contours are normal . H shaped thoracic vertebrae relate to the known history of sickle cell anemia .
    OUTPUT:
    
New airspace opacity in the right lower ___ , ___ represent an infection , infarct , or less likely atelectasis . Mild pulmonary vascular congestion .