公开(公告)号：EP0386054A4

公开(公告)日：1991-06-19

申请号：EP88909502

申请日：1988-11-04

申请人： UNIVERSITY OF QUEENSLAND

发明人： DODDRELL, DAVID, MICHAEL ,  GALLOWAY, GRAHAM, JOHN ,  BRERETON, IAN, MALCOLM

IPC分类号： A61B5/055 ,  G01R33/387 ,  G01R33/3875 ,  G01N24/06 ,  G01R33/22

CPC分类号： G01R33/3875

摘要： A method for providing Bo homogeneity at voxels away from the magnet isocenter for use in volume selected NMR spectroscopy wherein voxels are shimmed using only first-order X, Y and Z shims to produce three dimensional shim current maps (2) that are utilised in setting up for in vivo spectroscopy.

公开(公告)号：EP0303604A4

公开(公告)日：1990-11-28

申请号：EP87902345

申请日：1987-04-24

申请人： UNIVERSITY OF QUEENSLAND

发明人： DODDRELL, DAVID, MICHAEL ,  BROOKS, WILLIAM, MILES

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/483 ,  G01N24/08 ,  G01R33/20

CPC分类号： G01R33/4833

摘要： A method for volume-selected NMR spectroscopy where a rf pulse of selective bandwidth, in the presence of a field gradient superimposed upon an initial homogenous magnetic field, rotates a slice of magnetization into the transverse plane and then uses a high power refocussing pulse to refocus the phase roll that accompanies the rf pulse. After an appropriate time, the magnetization is pulsed back to the homogenous magnetic field axis and the gradient collapsed. A read pulse is used to tip the magnetization of interest into the transverse plane for acquisition in the absence of applied gradients.