PARTICLE DYNAMICS OF MONO-DOMAIN PARTICLES IN MAGNETIC PARTICLE IMAGING

被引：0

作者：

Weizenecker, Juergen ^{[1
]}

Gleich, Bernhard ^{[2
]}

Rahmer, Juergen ^{[2
]}

Borgert, Joern ^{[2
]}

机构：

[1] Univ Appl Sci, Dept Elect Engn, Moltkestr 30, D-76133 Karlsruhe, Germany

[2] Philips Res Europe Hamburg, D-22335 Hamburg, Germany

来源：

MAGNETIC NANOPARTICLES: PARTICLE SCIENCE, IMAGING TECHNOLOGY, AND CLINICAL APPLICATIONS | 2010年

关键词：

SIMULATION; SYSTEMS;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this report we present a detailed model of Brownian, Neel and combined rotation of magnetic mono domain particles in Magnetic Particle Imaging (MPI)(5). The magnetization and rotational movement is predicted using a set of Langevin equations. The stochastic differential equations were solved numerically and applied to MPI for a simple sequence. At 25 kHz and with moderate anisotropies, the Neel rotation dominates the signal. Nevertheless, the Brownian motion modulates the signal in a model of combined motion.

引用

页码：3 / 15

页数：13

共 13 条

[1] Thermally activated processes in magnetic systems consisting of rigid dipoles: equivalence of the Ito and Stratonovich stochastic calculus [J].

Berkov, DV ;

Gorn, NL .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (13) :L281-L287

[2] THERMAL FLUCTUATIONS OF A SINGLE-DOMAIN PARTICLE [J].

BROWN, WF .

PHYSICAL REVIEW, 1963, 130 (05) :1677-+

[3]

Coffey W. T., 2004, The Langevin Equation

[4]

Engel A, 2004, PHYS REV E, V70, DOI 10.1103/PhysRevE.70.051107

[5] Tomographic imaging using the nonlinear response of magnetic particles [J].

Gleich, B ;

Weizenecker, R .

NATURE, 2005, 435 (7046) :1214-1217

[6]

Kloeden P. E., 1999, NUMERICAL SOLUION ST, DOI DOI 10.1007/978-3-662-12616-5

[7] Trajectory analysis for magnetic particle imaging [J].

Knopp, T. ;

Biederer, S. ;

Sattel, T. ;

Weizenecker, J. ;

Gleich, B. ;

Borgert, J. ;

Buzug, T. M. .

PHYSICS IN MEDICINE AND BIOLOGY, 2009, 54 (02) :385-397

[8]

Knopp T, 2010, BILDVERARBEITUNG MED, P1

[9] On the interpretations of Langevin stochastic equation in different coordinate systems [J].

Martínez, E ;

López-Díaz, L ;

Torres, L ;

Alejos, O .

PHYSICA B-CONDENSED MATTER, 2004, 343 (1-4) :252-256

[10] DEMAGNETIZING FACTORS OF THE GENERAL ELLIPSOID [J].

OSBORN, JA .

PHYSICAL REVIEW, 1945, 67 (11-1) :351-357

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