A new FDTD method for the study of MRI pulsed field gradient-induced fields in the human body

被引：0
|
作者：
Crozier, S [1 ]
Zhao, H [1 ]
Feng, L [1 ]
机构：
[1] Univ Queensland, Ctr Magnet Resonance, St Lucia, Qld 4072, Australia
来源：
PROCEEDINGS OF THE 23RD ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-4: BUILDING NEW BRIDGES AT THE FRONTIERS OF ENGINEERING AND MEDICINE | 2001年 / 23卷
关键词：
D O I：
暂无
中图分类号：
R5 [内科学];
学科分类号：
1002 ; 100201 ;
摘要：
In modern MRI, patients are exposed to strong, rapidly switched magnetic field gradients that may be able to elicit nerve stimulation (1-14). This paper provides the numerical results of an investigation into induced current spatial distributions inside human tissue when exposed to these pulsed magnetic field gradients. Conventional FDTD methods are unable to model these effects as the effective frequencies of the input source are less than 100kHz or so, relatively low for FDTD calculations. A new High Definition FDTD variant was developed to operate over this bandwidth and a number of body and gradient models are analysed using the new method.
引用
收藏
页码：2307 / 2310
页数：4
相关论文
共 50 条
  • [1] A new FDTD method for the study of MRI pulsed field gradient-induced fields in the human body
    Crozier, S
    Zhao, HW
    Feng, L
    [J]. ANZIIS 2001: PROCEEDINGS OF THE SEVENTH AUSTRALIAN AND NEW ZEALAND INTELLIGENT INFORMATION SYSTEMS CONFERENCE, 2001, : 7 - 10
  • [2] An FDTD model for calculation of gradient-induced eddy currents in MRI system
    Liu, F
    Crozier, S
    [J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2004, 14 (03) : 1983 - 1989
  • [3] Finite-difference time-domain-based studies of MRI pulsed field gradient-induced eddy currents inside the human body
    Liu, F
    Crozier, S
    Zhao, HW
    Lawrence, B
    [J]. CONCEPTS IN MAGNETIC RESONANCE, 2002, 15 (01): : 26 - 36
  • [4] FDTD method for modelling the electromagnetic field effect on the human body in MRI
    Zhao, HW
    [J]. MICROWAVE AND RADIO FREQUENCY APPLICATIONS, 2003, : 495 - 505
  • [5] An FDTD Model for Calculation of Gradient-Induced Eddy Currents in MRI System (vol 14, pg 1983, 2004)
    Ozakin, M. Burak
    Aksoy, Serkan
    [J]. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2011, 21 (01) : 39 - 39
  • [6] An analysis of the gradient-induced electric fields and current densities in human models when situated in a hybrid MRI-LINAC system
    Liu, Limei
    Trakic, Adnan
    Sanchez-Lopez, Hector
    Liu, Feng
    Crozier, Stuart
    [J]. PHYSICS IN MEDICINE AND BIOLOGY, 2014, 59 (01): : 233 - +
  • [7] An equivalent distributed magnetic current based FDTD method for the calculation of E-fields induced by gradient coils in MRI
    Crozier, S
    Liu, F
    Wei, Q
    [J]. PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7, 2004, 26 : 1124 - 1127
  • [8] On the induced electric field gradients in the human body for magnetic stimulation by gradient coils in MRI
    Liu, F
    Zhao, HW
    Crozier, S
    [J]. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 2003, 50 (07) : 804 - 815
  • [9] CORRECTION OF DISTORTIONS DUE TO THE PULSED MAGNETIC-FIELD GRADIENT-INDUCED SHIFT IN B0 FIELD BY POSTPROCESSING
    JEHENSON, P
    SYROTA, A
    [J]. MAGNETIC RESONANCE IN MEDICINE, 1989, 12 (02) : 253 - 256
  • [10] A new method for studying gradient-induced neutrophil desensitization based on an open microfluidic chamber
    Keenan, Thomas M.
    Frevert, Charles W.
    Wu, Aileen
    Wong, Venus
    Folch, Albert
    [J]. LAB ON A CHIP, 2010, 10 (01) : 116 - 122
12345