Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker projects leads into to the right atrium and ventricle . The heart size is top normal . A moderately tortuous aorta is again seen . The hilar and mediastinal contours remain within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
No acute intrathoracic process .