Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires and surgical clips are unchanged in alignment . There is calcification and unfolding of the thoracic aorta . Hilar contours are normal . There is no pulmonary vascular congestion or edema . Heart size is mildly enlarged . Lungs are free of focal consolidation . There is decreased basilar atelectasis . There is no effusion or pneumothorax . Fractures involving the right fourth , fifth and sixth ribs posterolaterally demonstrates slightly increased displacement compared to ___ . No additional fractures are identified . Thoracic vertebral bodies are preserved in height .
    OUTPUT:
    
Right posterolateral fourth , fifth and sixth rib fractures , with slightly increased displacement compared to prior studies . No associated effusion or pneumothorax .