Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The known rib fractures at T7 , T9 , and T10 are poorly visualized on routine PA and lateral radiographs and can not be evaluated in detail . However , there is no evidence of significant displacement . There is no pleural effusion or pneumothorax . The lungs are clear and well expanded . Evidence of prior aortic dissection repair is re-demonstrated . The cardiomediastinal silhouette is unchanged . The hilar contours and pleural surfaces appear normal . Spinal hardware is partially imaged and is not appreciably changed in position .
    OUTPUT:
    
Known posterior rib fractures at T7 , T9 , and T10 are poorly visualized with routine PA and lateral chest radiographs ; however , there is no evidence of significant displacement . There is no pleural effusion or pneumothorax .