Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously described opacity in the right mid lung is no longer evident . A small dense nodular opacity at the right lung base is unchanged , probably a granuloma . Remainder of lungs are clear . Cardiomediastinal contours are stable in appearance . No pleural effusion or acute skeletal findings .
    OUTPUT:
    
Resolution of right mid lung opacity , which may have been due to a localized pneumonia .