Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternal wires are unchanged in alignment and configuration compared to the most recent radiograph of ___ , but the lowest sternal wire demonstrates an apparent change in orientation when compared to the first two postoperative radiographs of ___ at 1 :30 p .m . and 6 :02 p .m . However , it is similar to the third postoperative radiograph of that date and subsequent radiographs through ___ . There is no evidence of a wire fracture or definite migration . Cardiomediastinal contours are stable in the postoperative period . Partial atelectasis of the right upper lobe appears slightly improved and bibasilar retrocardiac atelectasis is also slightly better in the interval . Small pleural effusions are unchanged , and there is no evidence of pneumothorax .
    OUTPUT:
    
1 . Apparent change in orientation of lowest sternal wire when compared to earliest postoperative radiographs of ___ . Although less specific than sternal wire migration , this finding can be a sign of sternal dehiscence , and correlation with physical exam findings in this region may be helpful . 2 . Improving multifocal atelectasis and persistent small bilateral pleural effusions .