Abstract: Alternate sampling was used when there is only one analogue-to-digital converter in the quadrature dual channels receiver. Because the real part and the imaginary part are not acquired at the same time, there is the artifact on the spectrum of the alternate-sampled data. An Imagford algorithm is proposed for the elimination of the artifact and used in the home built micro NMR imaging system.

Key words: Alternate Sampling, FT, NMR Imaging