Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to yesterday 's chest radiograph the patient is rotated to the right . More prominence of the convexity of the ascending aorta is likely secondary to this rotation . The heart is not enlarged . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Mild atelectasis at the left base is evident . No displaced rib fracture is detected within the limitations of portable chest radiograph . L1 compression fracture is again seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .