Method and apparatus for high speed magnetic resonance imaging with improved image quality.

摘要

A nuclear magnetic resonance imaging, capable of obtaining the images with high spatial resolution and S/N ratio, reducing the influence of the inhomogeneity of the static magnetic field and the chemical shift artifacts, and improving the contrast in the T2 enhanced image and T1 enhanced image. The imaging uses the pulse sequence, including: application of RF pulses and slicing gradient magnetic field for exciting a desired region of the body to be examined; application of reading gradient magnetic field which regularly fluctuate between a negative value and a positive value; application of initial phase encoding gradient magnetic field before the reading gradient magnetic field is applied; application of a predetermined pulse shaped phase encoding gradient magnetic field every time the reading gradient magnetic field changes a polarity; and collection of the echo signals emitted from the desired region every time the reading gradient magnetic field changes the polarity. This pulse sequence is repeated with sequentially changing a setting of the initial phase encoding gradient magnetic field applied. <IMAGE>