Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well aerated and clear , without pleural effusion or pneumothorax . The heart is normal in size . Normal mediastinal contours . No displaced rib fractures are identified though a possible fracture is seen posteriorly at the left eighth and ninth ribs , though this may be artifactual due to crossing vessels or reflect prior injury .
    OUTPUT:
    
No definite rib fractures with possible left - sided fractures as described above . If continued clinical concern , consider dedicated rib views .