Transient MR elastography (t-MRE) using ultrasound radiation force:: Theory, safety, and initial experiments in vitro

被引：49

作者：

Souchon, Remi ^{[1
,2
]}

Salomir, Rares ^{[1
,2
]}

Beuf, Olivier ^{[2
,3
,4
,5
,6
,7
]}

Milot, Laurent ^{[2
,3
,4
,5
,6
,7
]}

Grenier, Denis ^{[2
,3
,4
,5
,6
,7
]}

Lyonnet, Denis ^{[8
,9
]}

Chapelon, Jean-Yves ^{[1
,2
]}

Rouviere, Olivier ^{[1
,2
,8
,9
]}

机构：

[1] INSERM, U556, F-69424 Lyon 3, France

[2] Univ Lyon, Lyon, France

[3] LRMN, CREATIS, Lyon, France

[4] CNRS, UMR 5220, Lyon, France

[5] INSERM, U630, F-69424 Lyon, France

[6] Univ Lyon 1, F-69365 Lyon, France

[7] INSA, Lyon, France

[8] Univ Lyon 1, Fac Med Lyon Nord, F-69365 Lyon, France

[9] Hop Edouard Herriot, Hosp Civils Lyon, Lyon, France

来源：

MAGNETIC RESONANCE IN MEDICINE | 2008年 / 60卷 / 04期

关键词：

magnetic resonance elastography; shear wave; radiation force; transient; ultrasound;

D O I：

10.1002/mrm.21718

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：

The purpose of our study was to assess the feasibility of using ultrasound radiation force as a safe vibration source for transient MR elastography (t-MRE). We present a theoretical framework to predict the phase shift of the complex MRE signal, the temperature elevation due to ultrasound, and safety indicators (I-SPPA, I-SPTA, MI). Next, we report wave images acquired in porcine liver samples in vitro. MR thermometry was used to estimate the temperature elevation induced by ultrasound. Finally, we discuss the implications of our results with regard to the feasibility of using radiation force for t-MRE in a clinical setting, and a specific echo-planar imaging (EPI) MRE sequence is proposed.

引用

页码：871 / 881

页数：11

共 39 条

[1] Rationale and derivation of Mi and Ti - A review [J].