NMR chemical shift imaging method with influence of intensity distribution of static magnetic field removed

摘要

In an NMR imaging method of distinguishing two chemical shifts of unclear spins and obtaining respective spin distribution images, 180 DEG RF. pulses are applied twice to generate two spin echoes after spins of an object for inspection have been exicted. In the second echo among them, a pulse time-interval is so set that the time difference between the Hahn echo and the gradient echo may provide two chemical shifts with a phase difference of 2n pi . On the basis of information representing the distribution of a static magnetic field included in an image obtained from the second pulse, an image obtained from the first echo is compensated. By using the compensated image, spin distribution images with two chemical shifts distinguished are obtained.