Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Vague linear opacities in the left lung likely represent atelectasis and is largely unchanged from prior studies . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . The hilar and cardiomediastinal contours are normal . A right chest wall infusion port and catheter are unchanged .
    OUTPUT:
    
Vague linear opacities in the left lung likely represent atelectasis . However very early pneumonia in the appropriate clinical setting can not be entirely excluded .