Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged but unchanged . Mediastinal and hilar contours are similar . Pulmonary vasculature is normal . Low lung volumes persist with linear opacities in the lung bases compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is due demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Subsegmental bibasilar atelectasis . Otherwise , no acute cardiopulmonary process . ___ , MD