UNDERSTANDING ACCELERATION INDUCED DISPLACEMENT ARTIFACTS IN PHASE-CONTRAST MR VELOCITY-MEASUREMENTS

被引：31

作者：

FRAYNE, R

RUTT, BK

机构：

[1] UNIV WESTERN ONTARIO,DEPT MED BIOPHYS,LONDON,ON,CANADA

[2] UNIV WESTERN ONTARIO,DEPT DIAGNOST RADIOL & NUCL MED,LONDON,ON,CANADA

[3] JOHN P ROBARTS RES INST,TOM LAWSON FAMILY IMAGING RES LABS,LONDON,ON N6A 5K8,CANADA

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1995年 / 5卷 / 02期

关键词：

ARTIFACT; IMAGE PROCESSING; MODEL; MATHEMATICAL; PHASE IMAGING; VASCULAR STUDIES; VELOCITY STUDIES;

D O I：

10.1002/jmri.1880050217

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 theoretical framework for understanding acceleration-induced errors in phase-contrast magnetic resonance velocity measurements has been developed. An important result of this framework is the interpretation of acceleration-induced velocity errors as displacement artifacts due to the delay between velocity and spatial encoding. A rotating-disk phantom was used to confirm the theoretically predicted displacement times (the difference between theory and experiment was 8.2%). Errors were also observed in velocity profiles measured in regions of fluid acceleration downstream from a step stenosis. The magnitude of these errors could be predicted and corrected by using the analytic framework.

引用

页码：207 / 215

页数：9

共 24 条

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