Practical Travel Safety Issues - TSA Pre Check, which type scanners?

I refuse to do the full body scanner. So, does TSA Pre-check, are they using the old style scanners, in which case it is worth it to get the Pre-Check clearance, or are they using the full body in which case I don't gain anything.
Thanks

I've been through Pre-check once -- at PHL. The scanner was the walk-through magnetometer, not the full body scanner.

I've never seen MMW or BKSX in a PreCheck line. In fact, I think the whole point of PreCheck is that you don't have to go through those.

It's the metal detector and four TSO's gabbing and standing around. Sadly it's quite nice.