Method and device for determining an nmr distribution in a region of a

Abstract

Disclosed is a method and the device for making NMR images which utilize additional measurements and additional calculations in order to achieve a substantial reduction of image artefacts caused by (respiratory) motions of the body. The additional measurements involve the sampling of the non-conditioned FID or echo signal which can (but need not) be performed during each measurement cycle without consuming a substantial amount of additional measurement time. The non-conditioned signal samples are used to derive a frequency spectrum which is a measure of the size of the object. By comparison of the frequency spectra of the various measurement cycles, standardization is obtained so that image signals produce an unambiguous image even though they have been derived from signal samples from measurement cycles performed in different states of motion (different object size).