Who is operating the scans who knows what they are doing? How is the equipment known to be trustworthy. Most of all who is interpreting the results? AI could do that last actually to significant degree. And there are various scanners being developed to plug into a cell phone.
But a CT scan stands for "computed tomography" and uses rotating x-ray beams. Not something you want at your corner drugstore or to use every time you feel a bit off!
