According to the AMS website

• They are using MMW (not x-ray) scanners for flights to the US with more on order (presumably for flights elsewhere).
• Not clear if every US bound passenger is scanned or if it's "random".
• If chosen for scanning, you can request a patdown instead (according to the brochure linked from page above).
• Screener interpreting image is right there at the machine and the image produced is a cartoon figure* rather than the explicit image produced by the US/UK machines.

I'm just telling you what I read; I may need to go to AMS later in the year and decided to check up. Any of the above could change, of course, but IMO it's not as bad as the UK/US model.

*ISTR that some of the systems used in the US produce an explicit image for viewing by the screener in the back room, and a cartoon image with the threat area highlighted for the screener at the machine. My interpretation of the AMS machine is that it goes right to the cartoon image. From a technology point-of-view, this is certainly feasible and and obviously preferable for privacy. It also eliminates the need for the backroom screener which may be bad for the Workfare aspect of the TSA system.

Edit to add: the video linked from the page above has English subtitles which describe MMW as "sound waves" (about 0:06) I don't know whether this is wrong in the Dutch narration or a translation error...