Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is mild bibasilar atelectasis . Lungs remain hyperinflated with faint reticular interstitial opacity , stable since the prior study , suggesting preexisting chronic obstructive pulmonary disease . No new focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The very inferior posterior costophrenic angles are excluded from the lateral view . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
No significant interval change .