A form of Fourier transformation imaging in which phase encoding gradient pulses are applied for a constant duration but with varying amplitude. The spin warp method, as other Fourier imaging techniques, is relatively tolerant of inhomogeneities in the magnetic fields.

MR imaging techniques in which at least one dimension is phase encoded by applying variable gradient pulses along that dimension before reading out the MR signal with a magnetic field gradient perpendicular to the variable gradient. The Fourier transformation is then used to reconstruct an image from the set of encoded MR signals. An imaging technique of this type is spin warp imaging.

See also Spin Warp Imaging.