Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is normal in size , and the aorta is diffusely tortuous . A focal opacity overlying the left third anterior rib level is similar compared to multiple prior chest radiographs dating back to ___ , and probably represents a healed rib fracture . No focal areas of consolidation are present within the lungs . Prominent pericardial fat pads are present bilaterally with minimal scarring adjacent to the left fat pad without change . Skeletal structures are remarkable for multilevel degenerative changes in the spine .
    OUTPUT:
    
No radiographic evidence of pneumonia .