Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A linear streaky opacity at the left base is most consistent with plate - like atelectasis . In comparison to the prior exam , bilateral atelectasis is improved and the lung volumes have increased . There is no dense consolidation , pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Surgical clips are noted in the left upper quadrant .
    OUTPUT:
    
No evidence of pneumonia . Improved , but persistent , left basilar atelectasis .