Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there is persistent airlessness of the left lower lung with elevation of the left hemidiaphragm . There is no pneumonia , pneumothorax or pulmonary edema . There has been no appreciable change in cardiomediastinal silhouette since preoperative evaluation . There has been some displacement of the osteotomy at the fourth posterior right rib , which is not significantly changed since yesterday . Nevertheless , there is no hemorrhage . Adjacent pleural thickening is unchanged . There is subcutaneous emphysema in the upper neck on the right .
    OUTPUT:
    
1 . Persistent , marked atelectasis , left lower lobe . 2 . Unchanged displacement of osteotomy at the fourth posterior right rib with no evidence of hemorrhage or pneumothorax .