Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is bilateral basal atelectasis . The left costophrenic angle is blunted , which may be secondary to atelectasis or a trace pleural effusion . There is no consolidation , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette is normal . Surgical clips are noted in the right upper quadrant .
    OUTPUT:
    
1 . Bibasilar atelectasis . 2 . Possible trace left pleural effusion .