MRI WITH DIXON-TYPE WATER/FAT SEPARATION AND PRIOR KNOWLEDGE ABOUT INHOMOGENEITY OF THE MAIN MAGNETIC FIELD

摘要

The present invention relates to a kind of at least two chemical species of MR imaging methods to have different MR spectrum. The object of the present invention is to provide one kind to make in Rod Dixon water/big visual field situation of hair separation to be required. The method of the present invention includes following steps: a kind of) generate the magnetic field gradient that at least one echo-signal is placed on pulse and the switching of MR devices inspection volume and imaging sequence according to one ontology of theme; Step b) obtains at least one echo-signal; At least two chemical species of contribution of step c) separating signals and at least one echo-signal spectrum model obtained and the spatial variations main field Bo based on priori knowledge about check volume; D) MR images are rebuild from least one chemical species of signal contribution. In addition,The present invention relates to a kind of MR equipment and computer program to operate in a kind of MR equipment.