Magnetic field gradient applied during the period when the receiver components are on. The application of this gradient, which is active during the period when the echo is being formed, results in the frequency encoding of the object being imaged.
Also called frequency encoding gradient.

Doubling the sampling points in frequency encoding direction without expanding the scan time. The additional part is discarded after reconstruction.

See also Oversampling and Aliasing Artifact.

A real number is a component of a complex number. In MRI, complex data are used for example in the Fourier transforms.

In phase component of signal detected with a quadrature detector.

Immediate display of reconstructed images during the scan time. Also called online display.