Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable left linear opacities in the left upper and lower lung likely represent scarring . The lungs are clear without focal consolidation , edema , pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . A left pectoral pacemaker is in unchanged position . Spinal hardware overlies the cervical spine .
    OUTPUT:
    
No acute cardiopulmonary process .