Complex sentence: The Rapiscan backscatter machine produces an x-ray more absorbed by the skin than most x-ray devices, but is still regulated under the ANSI standard for "effective dose" Damage done to the skin by x-rays is similar to the damage done by sunlight.
Split into simpler sentences: The Rapiscan backscatter machine produces an X-ray more absorbed by the skin than most other X-ray devices but is still regulated under the ANSI. The standard for "effective dose" damage done to the skin by X-rays is similar to the damage done by sunlight.