Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal and hilar contours are within normal limits . The pulmonary vascularity is normal . Previously noted right lower lobe patchy ill - defined opacity has improved . Previously described nodular opacity measuring 12 mm projecting over the right mid lung field may reflect the end of the right anterior 6th rib . Left lung is clear . There is no pleural effusion or pneumothorax . No acute osseous abnormalities are detected .
    OUTPUT:
    
1 . Resolving right lower lobe pneumonia . 2 . Previously described 12 mm nodular opacity projecting over the right mid lung field may reflect the end of the anterior right 6th rib . Oblique views can be obtained for further evaluation as suggested previously .