Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable reticular markings likely reflect chronic lung disease . Mild left lower lobe atelectasis , unchanged . Right lung is clear . No pleural effusions or pneumothorax . The heart size is normal . No displaced rib fractures identified . Mild acromioclavicular arthropathy . Multilevel anterior osteophytes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .