Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . Mild atherosclerotic calcifications are noted at the aortic knob . The pulmonary vasculature is not engorged . Streaky atelectasis is seen in the left lower lobe . Right lung is clear . No focal consolidation , pleural effusion or pneumothorax is detected . There are mild to moderate multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .