Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear other than mild left lung base atelectasis . No focal consolidation , edema , effusion , or pneumothorax . The heart is mildly enlarged , unchanged . The descending thoracic aorta is slightly tortuous . Mediastinal and hilar contours are unchanged . No acute osseous abnormality . A coronary stent projects over the heart .
    OUTPUT:
    
No pneumonia or evidence of heart failure .