Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left chest wall is cut off from the image . The newly placed intra aortic balloon pump projects over the descending thoracic aorta , coursing superiorly with its tip projecting over the ___ the aortic knob , 12 mm from the superior aspect of the aortic knob , in satisfactory placement . The mediastinal contours are overall unchanged . The descending thoracic aorta slightly tortuous and / or ectatic , unchanged . The heart is normal in size . No pleural effusion , pneumothorax , focal consolidation , or edema .
    OUTPUT:
    
Newly placed intra aortic balloon pump tip is in satisfactory position .