Referenced MR thermometry using three-echo phase-based fat water separation method

被引：7

作者：

Hofstetter, Lorne W. ^{[1
]}

Yeo, Desmond T. B. ^{[2
]}

Dixon, W. Thomas ^{[3
]}

Marinelli, Luca ^{[2
]}

Foo, Thomas K. ^{[2
]}

机构：

[1] Univ Utah, Dept Radiol, Salt Lake City, UT 84132 USA

[2] GE Global Res, Niskayuna, NY USA

[3] Emory Univ, Dept Radiol, Atlanta, GA USA

来源：

MAGNETIC RESONANCE IMAGING | 2018年 / 49卷

关键词：

MR thermometry; Temperature mapping; Chemical shift imaging; Fat-referenced; PROTON CHEMICAL-SHIFT; SUSCEPTIBILITY CHANGES; DIXON TECHNIQUE; TEMPERATURE; BREAST; FEASIBILITY; RESPIRATION; ERRORS;

D O I：

10.1016/j.mri.2018.01.002

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 three-point image reconstruction method for internally referenced MR thermometry was developed. The technique exploits the fact that temperature-induced changes in the water resonance frequency are small relative to the chemical shift difference between water and fat signals. This property enabled the use of small angle approximations to derive an analytic phase-based fat-water separation method for MR thermometry. Ethylene glycol and cream cool-down experiments were performed to validate measurement technique. Over a cool-down temperature range of 20 degrees C, maximum deviation between probe and MR measurement (averaged over 1.3 cm(3) region surrounding probe) was 0.6 degrees C and 1.1 degrees C for ethylene glycol and cream samples, respectively.

引用

页码：86 / 93

页数：8

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