Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . Lung volumes are normal . The heart is mildly enlarged , unchanged . The descending thoracic aorta slightly tortuous . Right curvature of the thoracic spine is mild . No focal consolidation , effusion , edema , or pneumothorax . Degenerative changes in both AC joints are noted . Multi - level degenerative changes of thoracic spine are severe with prominent anterior osteophytes .
    OUTPUT:
    
1 . No focal pneumonia . 2 . Persistent mild cardiomegaly without evidence of pulmonary edema or pleural effusion . 3 . Multilevel degenerative changes in the thoracic spine .