Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are stable linear bands of scarring or atelectasis in the bilateral lung bases . The lungs are otherwise clear . There is no pneumothorax or pleural effusion . The hilar and cardiomediastinal contours are normal . The cardiac silhouette is stable . Cardiac size is stable . Pulmonary vascularity is normal . A right - sided Port - A - Cath terminates in the mid SVC .
    OUTPUT:
    
No evidence of pneumonia .