Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar opacities are identified . Otherwise , the upper lungs are clear . The cardiomediastinal silhouette is normal . The aorta appears tortuous stably tortuous . There is no evidence of a pleural effusion or pneumothorax . Surgical clips again noted in the right upper quadrant .
    OUTPUT:
    
Bibasilar opacities , left greater than right , likely representative of atelectasis .