Frequency-domain simulation of MR tagging

被引：14

作者：

Crum, WR ^{[1
]}

Berry, E ^{[1
]}

Ridgway, JP ^{[1
]}

Sivananthan, UM ^{[1
]}

Tan, LB ^{[1
]}

Smith, MA ^{[1
]}

机构：

[1] Univ Leeds, Ctr Med Imaging Res, Leeds LS2 9JT, W Yorkshire, England

来源：

JOURNAL OF MAGNETIC RESONANCE IMAGING | 1998年 / 8卷 / 05期

关键词：

MRI; tagging; theory; simulation;

D O I：

10.1002/jmri.1880080507

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：

Simulation of MR images is a useful tool for offline sequence development and as an aid to understanding image formation. One particular application of simulation is MR tagging, which is used for tracking myocardial motion. Simple spatial-domain methods cannot adequately represent effects common in these images, such as motion artifact and signal wrap. An existing frequency-domain model is shown to be inappropriate for tagged images, and an extension based on the Bloch equations and Fourier shift theorem is described to correct this. Software incorporating the new model is used to generate ideal tag intensity profiles and to accurately simulate tagged images. The shifted k-space patterns associated with tagged images, and their dependence on the order of the binomial tagging sequence, are explained. An application of the Fourier shift theorem is suggested that allows more rapid simulation of static tagged images.

引用

页码：1040 / 1050

页数：11

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