At 16 T you can levitate a frog purely through diamagnetism. I imagine you could do the same for a human as well if you could create a chamber that large with a uniform field of that magnitude.
That said, assuming 16 T cancels gravity, I imagine being imaged in a MRI machine at 7 T horizontal magnetic field would probably feel like a net gravity vector at an angle, i.e. lying on a steep slope of arcsin(7/16) = 0.452 radians, which is pretty steep.
https://www.youtube.com/watch?v=KlJsVqc0ywM
That said, assuming 16 T cancels gravity, I imagine being imaged in a MRI machine at 7 T horizontal magnetic field would probably feel like a net gravity vector at an angle, i.e. lying on a steep slope of arcsin(7/16) = 0.452 radians, which is pretty steep.