Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are stable linear opacities at the right lung base and mild bibasilar atelectasis . Fibrotic changes are seen along the periphery of the right upper lung . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . A cardiac pacemaker with two leads in appropriate position is again noted .
    OUTPUT:
    
1 . No evidence of pneumonia or congestive heart failure . 2 . Possible right lung fibrotic changes .