Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged , not significantly changed from prior examination . There is redemonstration of a moderate hiatal hernia . Mediastinal and hilar contours are within normal limits . Lungs are hyperexpanded , most likely due to chronic lung disease . There is no pulmonary vascular congestion . Patchy bibasilar and airspace opacities likely reflect atelectasis . There is no pleural effusion or pneumothorax . There is redemonstration of compression deformities of the mid thoracic spine . Old rib fractures are seen on the right .
    OUTPUT:
    
Patchy bibasilar opacities likely reflect atelectasis .