Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There are linear left basilar opacities , most suggestive of scar versus atelectasis . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is normal . No acute osseous abnormality is identified .
    OUTPUT:
    
No acute cardiopulmonary process . Findings suggestive of left base scar versus atelectasis .