Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well - expanded with persistent right lower lobe linear opacity consistent with atelectasis or scarring . The lungs are otherwise clear . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . Specifically , no pneumonia . 2 . Right lower lobe atelectasis atelectasis or scarring .