公开(公告)号：EP0379802A3

公开(公告)日：1991-04-24

申请号：EP89313321.5

申请日：1989-12-20

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert

IPC: G01R33/56

CPC classification number: G01R33/56518

Abstract: A method of reducing the effects of eddy currents produced by a gradient magnetic field pulse pattern applied to a body in a magnetic resonance method by selecting the rates of change of magnetic flux produced during the edges of the or each pulse of the pulse pattern in relation to the times elapslng between the edges and the time constants of the eddy currents.

公开(公告)号：EP0159780B1

公开(公告)日：1989-08-02

申请号：EP85301260.7

申请日：1985-02-25

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Chui, Kui Ming

IPC: G01R33/20 ,  G01N24/08 ,  A61B5/05

CPC classification number: G01R33/58

公开(公告)号：EP0153531B1

公开(公告)日：1989-02-15

申请号：EP84308531.7

申请日：1984-12-07

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Butson, Peter Charlton

IPC: H01F7/20

CPC classification number: G01R33/34069 ,  G01R33/34076

公开(公告)号：EP0109238B1

公开(公告)日：1989-01-18

申请号：EP83306723.4

申请日：1983-11-04

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert ,  Bailes, David Robert

IPC: G01N24/08

CPC classification number: G01R33/482

公开(公告)号：EP0106551B1

公开(公告)日：1988-12-07

申请号：EP83305507.2

申请日：1983-09-20

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert

IPC: G01N24/04 ,  G01N24/08

CPC classification number: G01R33/56 ,  G01R33/58

公开(公告)号：EP0096487B1

公开(公告)日：1987-08-12

申请号：EP83302823.6

申请日：1983-05-18

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert

IPC: A61B5/10 ,  G01N24/04

CPC classification number: G01R33/58 ,  G01R33/28 ,  G01R33/5676

公开(公告)号：EP0223543A2

公开(公告)日：1987-05-27

申请号：EP86308793.8

申请日：1986-11-12

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Gyngell, Michael Laurence

IPC: G01N24/08

CPC classification number: G01R33/4822 ,  G01R33/561 ,  G01R33/5613

Abstract: In a steady state free precession (SFP) magnetic resonance imaging method, after each pulse (1) of an applied train of phase coherent RF pulses which excite magnetic resonance spins in a region of a body being examined, magnetic field gradients (7, 11) are applied to encode the excited spins and the encoded spins are detected, and at least one further magnetic field gradient (15, 17) is then applied to rephase the spins by the time the next RF pulse is applied.
The method finds particular application where the applied encoding gradients serve to encode the spins in such a manner as to allow a multi-dimensional Fourier transform technique to be used to reconstruct an image.
The method allows more rapid data acquisition than has been possible hitherto in SFP imaging.

公开(公告)号：EP0096590B1

公开(公告)日：1986-11-05

申请号：EP83303311.1

申请日：1983-06-08

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert

IPC: G01N24/08

CPC classification number: G01R33/4838

公开(公告)号：EP0118198B1

公开(公告)日：1986-09-03

申请号：EP84300625.5

申请日：1984-02-01

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert

IPC: H01F3/06 ,  H01F27/24 ,  H01F7/20

CPC classification number: H01F27/24 ,  H01F3/06 ,  H01F7/20

公开(公告)号：EP0150938A3

公开(公告)日：1986-05-28

申请号：EP85300201

申请日：1985-01-11

Applicant: PICKER INTERNATIONAL LIMITED

Inventor： Young, Ian Robert

IPC: G01N24/06 ,  G01N24/08

CPC classification number: G01R33/381

Abstract: An NMR apparatus capable of being used for both chemical analysis and imaging of a body without adjustment of the magnetic field strength of the magnet system used to define the equilibrium axis of magnetic alignment of the nuclei within the body. The apparatus incorporates two magnet systems (2, 35) each capable of independently defining an equilibrium axis of magnetic alignment to nuclei with a body to be examined by NMR techniques.