phase encoding

(redirected from gradient encoding)
Also found in: Encyclopedia.

phase en·cod·ing

in magnetic resonance imaging, the technique of inducing a gradient in the magnetic field in the x or y axis to induce phase differences with location.
Synonym(s): gradient encoding

phase encoding

An MRI term for the process of locating an MR signal by altering the phase of spins in one dimension with a pulsed magnetic field gradient along that dimension before acquiring the signal. Because each signal component experiences a different phase-encoding gradient pulse, its exact spatial reconstruction can be specifically and precisely located by the Fourier transformation analysis. Spatial resolution is directly correlated to the number of phase-encoding levels (gradients) used.