Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is stably mildly enlarged . There is no focal lung consolidation . There is no pneumothorax or pleural effusion . There is a right perihilar opacity that has improved from ___ and possibly reflects bronchovascular crowding in the setting of low lung volumes although pneumonia is difficult to exclude .
    OUTPUT:
    
Right perihilar opacity , improved from ___ , possibly represents crowding of vessels in the setting of low lung volumes however in the appropriate clinical setting pneumonia is possible .