Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged , unchanged . The aorta is mildly tortuous and demonstrates mild atherosclerotic calcifications at the aortic knob , unchanged . Pulmonary vasculature is not engorged . There is minimal atelectasis in the left lung base . No focal consolidation , pleural effusion or pneumothorax is present . Mild multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .