Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left basilar opacities likely represent subsegmental atelectasis . The lung volumes are low but otherwise clear . There is no pneumothorax . No vascular congestion or large pleural effusions are evident . Cardiomediastinal and hilar contours are within normal limits . The colon is distended below the left hemidiaphragm .
    OUTPUT:
    
Left basilar atelectasis . No consolidation , edema or pleural effusions .