Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to previous exam from ___ . Linear opacity in the right mid lung and at the left lung base are most suggestive of atelectasis versus scarring . The lungs are otherwise clear . There is no effusion . Cardiomediastinal silhouette is within normal limits . Lower thoracic vertebral body cage and lateral screws are unchanged in position . Osseous and soft tissue structures are otherwise unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process .