Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is linear scarring at the left base . Otherwise the lungs are clear . There is no focal consolidation , effusion , or pneumothorax . The size of the heart is top normal . There are no abnormal cardiac or mediastinal contours . Osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .