Anyone care to do the math on what it would cost in excess fuel to add enough metal shielding to the fuselage to offer passengers "new and improved: no x-rays!"

Anyone care to do the math on what it would cost in excess fuel to add enough metal shielding to the fuselage to offer passengers "new and improved: no x-rays!" flights? (Only mostly not serious). With more widespread awareness of x-ray exposure during a normal flight, I wonder if we will see any people so agitated that they wear stuff like this: http://www.medvena.com/protection_clothing_maco_en.html http://www.medvena.com/protection_clothing_maco_en.html