Airport baggage scanners are nowhere near the complexity of CT machines. Not even the same kind of device. They also don't have to be designed and certified for human subjects.
> The CT scanner can create 3-D images of the contents of a bag, allowing TSA officers to rotate the images to better analyze the contents. In the future, the CT scanner may allow passengers to leave laptops and liquids inside of their carry-on bags, TSA officials say.
https://www.courant.com/la-fi-ct-scanners-20180730-story.htm...