A novel object-independent "balanced" reference scan for echo-planar imaging

被引：0

作者：

Reeder, SB ^{[1
]}

Faranesh, AZ ^{[1
]}

Atalar, E ^{[1
]}

McVeigh, ER ^{[1
]}

机构：

[1] Johns Hopkins Univ, Sch Med, Baltimore, MD 21205 USA

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1999年 / 9卷 / 06期

关键词：

MRI; EPI; reconstruction; reference scans;

D O I：

10.1002/(SICI)1522-2586(199906)9:6<847::AID-JMRI13>3.3.CO;2-4

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：

Interleaved echo-planar imaging (EPI) is susceptible to significant ghosting artifacts. resulting primarily from system time delays that cause data matrix misregistration, Most EPI applications rely on "reference scans" to measure delays, and post-processing algorithms are used to correct these errors. Unfortunately; delay estimates made with most reference scan techniques are object dependent, since they are biased by magnetic field inhomogeneities and chemical shift. The current work describes the effects of field inhomogeneities and their influence on system time delay estimation. Subsequently, a new, object-independent "balanced" reference method using two readout echo trains is proposed for time delay measurements. (C) 1999 Wiley-Liss, Inc.

引用

页码：847 / 852

页数：6

共 15 条

[11] Quantification and reduction of ghosting artifacts in interleaved echo-planar imaging [J].

Reeder, SB ;

Atalar, E ;

Bolster, BD ;

McVeigh, ER .

MAGNETIC RESONANCE IN MEDICINE, 1997, 38 (03) :429-439

[12]

Reeder SB, 1999, MAGNET RESON MED, V41, P87, DOI 10.1002/(SICI)1522-2594(199901)41:1<87::AID-MRM13>3.0.CO

[13]

2-X

[14] Reduction of geometric and intensity distortions in echo-planar imaging using a multireference scan [J].

Wan, X ;

Gullberg, GT ;

Parker, DL ;

Zeng, GL .

MAGNETIC RESONANCE IN MEDICINE, 1997, 37 (06) :932-942

[15]

ZHOU X, 1996, 4 ANN M ISMRM, P1477

← 1 2 →