Real-time holographic reconstruction of NMR images in Fresnel transform imaging technique

A method of real-time holographic reconstruction of Nuclear Magnetic Resonance (NMR) images by making a hologram directly from the NMR signal is described. Since the signal obtained in the NMR Fresnel transform technique is given by an equation similar to that of the Fresnel diffraction equation in light, holographic reconstruction of NMR images is possible by recording the NMR signal as a hologram and using a coherent optical system. In this paper, the authors propose a new fast image reconstruction technique in which NMR signal is directly recorded on a liquid crystal-spatial light modulator (LCSLM) as a hologram, and NMR images are reconstructed instantaneously by illuminating the hologram with a coherent laser light. In the simulation experiment, it is shown that image reconstruction from 256×256 data-matrix was performed at a rate of about 30 msec