TRACKING OF CYCLIC MOTION WITH PHASE-CONTRAST CINE MR VELOCITY DATA

被引：92

作者：

PELC, NJ

DRANGOVA, M

PELC, LR

ZHU, Y

NOLL, DC

BOWMAN, BS

HERFKENS, RJ

机构：

[1] Department of Radiology, Stanford University, Center for Magnetic Resonance Imaging and Spectroscopy, Stanford, California, 94305-5488

[2] Department of Electrical Engineering, Stanford University, Richard M. Lucas Center for Magnetic Resonance Imaging and Spectroscopy, Stanford, California, 94305-5488

[3] Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1995年 / 5卷 / 03期

关键词：

HEART; FUNCTION; MR; MOTION STUDIES; PHASE IMAGING; VELOCITY STUDIES;

D O I：

10.1002/jmri.1880050319

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 method of computing trajectories of objects by using velocity data, particularly as acquired with phase-contrast magnetic resonance (MR) imaging, is presented. Starting from a specified location at one time point, the method recursively estimates the trajectory. The effects of measurement noise and eddy current-induced velocity offsets are analyzed. When the motion is periodic, trajectories can be computed by integrating in both the forward and backward temporal directions, and a linear combination of these trajectories minimizes the effect of velocity offsets and maximizes the precision of the combined trajectory. For representative acquisition parameters and signal-to-noise ratios, the limitations due to measurement noise are acceptable. In a phantom with reciprocal rotation, the measured and true trajectories agreed to within 3.3%. Sample trajectory estimates of human myocardial regions are encouraging.

引用

页码：339 / 345

页数：7

共 27 条

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