TWISTING RADIAL LINES WITH APPLICATION TO ROBUST MAGNETIC-RESONANCE-IMAGING OF IRREGULAR FLOW

被引：52

作者：

JACKSON, JI

NISHIMURA, DG

MACOVSKI, A

机构：

[1] Magnetic Resonance Systems Research Laborarory, Stanford University, Stanford, California, 94305

来源：

MAGNETIC RESONANCE IN MEDICINE | 1992年 / 25卷 / 01期

关键词：

D O I：

10.1002/mrm.1910250113

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 problem with magnetic resonance angiograms of vessels containing irregular flow isthat flow‐induced dephasing can result in voids in the image. These void regionsare susceptible to misinterpretation as regions of stenosis or other vessel pathology. Flow‐induced dephasing can be minimized by using radial lines to cover k space. However, radial lines provide a very nonuniform, and hence, inefficient, coverage of k space. By twisting the outer portions of the radial trajectories, undistorted images of very rapid and turbulent flow can be obtained with a reasonable number of RF excitations. o 1992 Academic Press, Inc. Copyright © 1992 Wiley‐Liss, Inc., A Wiley Company

引用

页码：128 / 139

页数：12

共 11 条

[1] MR ANGIOGRAPHY OF PERIPHERAL, CAROTID, AND CORONARY-ARTERIES [J].

ALFIDI, RJ ;

MASARYK, TJ ;

HAACKE, EM ;

LENZ, GW ;

ROSS, JS ;

MODIC, MT ;

NELSON, AD ;

LIPUMA, JP ;

COHEN, AM .

AMERICAN JOURNAL OF ROENTGENOLOGY, 1987, 149 (06) :1097-1109

[2]

FELBER S R, 1988, Magnetic Resonance Imaging, V6, P46

[3]

JACKSON JI, IEEE T MED IMAGING, V10, P473

[4] IMAGE FORMATION BY INDUCED LOCAL INTERACTIONS - EXAMPLES EMPLOYING NUCLEAR MAGNETIC-RESONANCE [J].

LAUTERBUR, PC .

NATURE, 1973, 242 (5394) :190-191

[5]

LENZ G W, 1987, Magnetic Resonance Imaging, V5, P544, DOI 10.1016/0730-725X(87)90420-6

[6] CAROTID BIFURCATION - MR IMAGING - WORK IN PROGRESS [J].

MASARYK, TJ ;

ROSS, JS ;

MODIC, MT ;

LENZ, GW ;

HAACKE, EM .

RADIOLOGY, 1988, 166 (02) :461-466

[7] MAGNETIC-RESONANCE ANGIOGRAPHY BY SELECTIVE INVERSION RECOVERY USING A COMPACT GRADIENT ECHO SEQUENCE [J].

NISHIMURA, DG ;

MACOVSKI, A ;

JACKSON, JI ;

HU, RS ;

STEVICK, CA ;

AXEL, L .

MAGNETIC RESONANCE IN MEDICINE, 1988, 8 (01) :96-103

[8]

NISHIMURA DG, MAGNET RESON MED, V22, P481

[9]

PAULY JM, 1989, 8TH P P ANN M SOC MA, P28

[10]

SANO K, 1988, 7TH P SOC MAGN RES M, P123

← 1 2 →