Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are stable in appearance since the prior examinations . Two central venous catheters remain in stable position . Again noted is left basilar opacity , most consistent with atelectasis . No focal consolidation is identified . No significant pleural effusion or pneumothorax .
    OUTPUT:
    
Left basilar atelectasis .