Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , there has been interval loosening of one screw in the upper sternum . The sternum has overall improved alignment compared with prior . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Interval loosening of one screw in the upper sternum , with overall improved alignment of the sternum compared with prior .