Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are unchanged with tortuosity of the thoracic aorta again seen . There are minimal streaky opacities in the lower lungs bilaterally . There is no pleural effusion or pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Bibasilar streaky opacities , likely atelectasis .