ORBITAL NAVIGATOR ECHOES FOR MOTION MEASUREMENTS IN MAGNETIC-RESONANCE-IMAGING

被引：153

作者：

FU, ZW ^{[1
]}

WANG, Y ^{[1
]}

GRIMM, RC ^{[1
]}

ROSSMAN, PJ ^{[1
]}

FELMLEE, JP ^{[1
]}

RIEDERER, SJ ^{[1
]}

EHMAN, RL ^{[1
]}

机构：

[1] MAYO CLIN,DEPT DIAGNOST RADIOL,ROCHESTER,MN 55905

来源：

MAGNETIC RESONANCE IN MEDICINE | 1995年 / 34卷 / 05期

关键词：

MOTION CORRECTION; MAGNETIC RESONANCE IMAGING; NAVIGATOR ECHO; ORBIT;

D O I：

10.1002/mrm.1910340514

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A single ''orbital'' navigator echo, that has a circular k-space trajectory, is used to simultaneously measure in-plane rotational and multi-axis translational global motion. Rotation is determined from the shift in the magnitude profile of the echo with respect to a reference echo. Displacements are calculated from the phase difference between the current echo and a reference echo. Phantom studies show that this technique can accurately measure rotation and translations. Preliminary results from adaptive motion correction studies on phantom and human subjects indicate that the orbital navigator echo is an effective method for motion measurement in MRI.

引用

页码：746 / 753

页数：8

共 12 条

[1] ANALYSIS AND CORRECTION OF MOTION ARTIFACTS IN-DIFFUSION WEIGHTED IMAGING [J].