Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal contours are unremarkable with mild prominence of the hila bilaterally . Streaky bibasilar airspace opacities likely reflect atelectasis . There is no pulmonary vascular engorgement . No pneumothorax or pleural effusion is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis . Normal cardiac silhouette size , without evidence for thoracic aortic enlargement .