Title:
DIFFUSION EMPHASIS IMAGING METHOD, DYNAMIC IMAGING METHOD AND MRI DEVICE
Document Type and Number:
Japanese Patent JP3069286
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress the artifact resulted from body motion.
SOLUTION: An exciting pulse R1 and a slice gradient S1 exciting a slice S are applied. A diffusion emphasizing gradient MPG 1 is then applied. A reverse pulse R2 and a FOV limiting gradient RS for limiting the data collecting area to the above narrow FOV are applied. A diffusion emphasizing gradient MPG 2 is then applied. Positive and negative reed gradients RA, RB are alternately and continuously applied m-times, and MR data are collected from a plurality of imaged echoes e1∼em while a phase encode gradient W is applied. The amplitude-time product of the phase encode gradient W is 1/(γ.FOV) when magnetic rotating ratio is γ. Thus, a diffusion emphasized image with practical resolution in which the FOV in the phase encode axial direction is narrowed, but the artifact resulted from body motion is suppressed can be provided.
Inventors:
Tetsuji Tsukamoto
Eiji Yoshidome
Eiji Yoshidome
Application Number:
JP2822596A
Publication Date:
July 24, 2000
Filing Date:
February 15, 1996
Export Citation:
Assignee:
GE Yokogawa Medical System Co., Ltd.
International Classes:
G01R33/48; A61B5/055; G01R33/563; G01R33/56; (IPC1-7): A61B5/055; G01R33/48
Domestic Patent References:
| JP4108427A | ||||
| JP21236A | ||||
| JP2131746A | ||||
| JP2239841A | ||||
| JP62167554A | ||||
| JP6379646A | ||||
| JP6121781A |
Attorney, Agent or Firm:
Shinshiro Arichika