| 摘要 |
<p>"Fast method and device for determining an NMR distribution in a region of a body" The invention relates to a method of making NMR images (density distributions, location-dependent spectroscopy) utilizing two alternating gradient fields whose gradient directions are mutually perpendicular. Thus, a two-dimensional "plane" in the 3-D image frequency space can be filled with a uniform density of measurement points. Per FID signal more signal samples can be taken, resulting in a substantial reduction of the entire measurement procedure for a 3-D image. This method is very well suitable for the imaging of 3-D density distributions, 2-D or 3-D spectroscopy etc. The periods and the amplitudes of the alternating gradient fields are preferably the same; however, these fields are preferably phase-shifted 90.degree. with respect to one another.</p> |
