Magnetic field mapping around metal implants using an asymmetric spin-echo MRI sequence

被引：29
作者：
Bartusek, K.
Dokoupil, Z.
Gescheidtova, E.
机构：
[1] Acad Sci Czech Republic, Inst Sci Instruments, Brno 61200, Czech Republic
[2] Brno Univ Technol, Fac Elect Engn & Commun, Brno 61200, Czech Republic
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2006年 / 17卷 / 12期
关键词：
nuclear magnetic resonance; spin echo; MRI; B-0; mapping; dental material;
D O I：
10.1088/0957-0233/17/12/015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Magnetic susceptibility of materials that are used for body implants causes much distortion in MR images. This paper deals with mapping the magnetic field induction in the vicinity of these materials. A modified spin-echo method is used, in which via inserting a time interval of a defined length the range of phase modulation is reduced below the value 2 pi. Even with a large B-0 inhomogeneity it is not necessary to unwrap the phase jumps. The method is suitable for studying the effects of body-implant materials on MR images and for measuring their magnetic susceptibility.
引用
收藏
页码：3293 / 3300
页数：8
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