Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs remain clear . The cardiomediastinal silhouette is within normal limits . Biapical scarring is again seen . No acute osseous abnormality is identified . Surgical clips in the neck likely related to prior thyroid surgery .
    OUTPUT:
    
No acute cardiopulmonary process .