Cyril E. King has a millimeter wave (full body scanner) and magnetometers (metal detectors). I believe you can always request a pat-down but I haven't been able to find documentation of that on the TSA site. The TSA site does say you can request privacy for the pat-down and/or you can request to be seated . . . they have a whole section on pregnant travelers but it seems overly simplistic (frankly I think it's so childish as to be insulting) and doesn't mention requesting a pat-down.

You can request special assistance - see https://www.tsa.gov/travel/passenger-support This does appear to be available at Cyril E. King.