Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette and linear subsegmental atelectasis in the right lung base . The lungs are otherwise well aerated , without evidence of pneumothorax , confluent consolidation , pleural effusion , or pulmonary vascular congestion . Mild deformity along the lateral posterior aspect of the right ninth rib is compatible with a healed fracture .
    OUTPUT:
    
No evidence of pleural effusions . Subsegmental atelectasis in the right lower lobe .