Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar linear opacities are unchanged from prior radiographs on ___ , and represent subsegmental atelectasis . The lungs are otherwise clear without new consolidation or edema . There is no pneumothorax or pleural effusion . The cardiomediastinal silhouette is normal . The osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .