Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is tortuous but unchanged . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is normal . Subsegmental atelectasis is noted within the right middle lobe . Lungs are otherwise clear without focal consolidation , pleural effusion or pneumothorax . No acute osseous abnormalities visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .