Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . There are vague opacities in the lingula and left lower lobe , the left lower lobe opacity , present before . Findings are most suggestive of atelectasis . There is no evidence for pulmonary edema . Bony structures are unremarkable .
    OUTPUT:
    
Left basilar opacities , probably atelectasis .