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Preliminary simulation studies of the body 's electromagnetic model

Author: HeChaoMing
Tutor: XiaLing
School: Zhejiang University
Course: Biomedical Engineering
Keywords: Human electromagnetic model Simulation Study Gradient coils Human Body Model MR system Numerical simulation Technical Specifications Human Body Boundary conditions Current role
CLC: R318
Type: Master's thesis
Year: 2003
Downloads: 157
Quote: 3
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Abstract


This paper reviews the research progress of electromagnetic fields on neural and cardiac stimulation , focusing in magnetic resonance , this centralized represent electromagnetic physiological stimulation problems exist in the development of the system of the magnetic field of the top technical indicators of the need for this research , and leads the research method ; approach to the study of this subject instant FDTD method introduced , including the analysis of numerical stability and dispersion conditions , highlighting the significance of absorbing boundary conditions and described the theoretical basis of the four types of boundary conditions ; numerical simulation of the four types of boundary conditions , the simulation results are compared ; numerical simulation of the gradient coil excitation do the whole human body model , the distribution of the investigated gradient coils in different cross-sections of the human body average specific absorption rate , and by changing the gradient the position of the coil to examine its impact on the human body ; heart has a larger cross-section induced current peak current sensitivity of the heart area and improve computational efficiency , from the human body model cardiac body segments to intercept , examine gradient coil current effect to the heart of the current distribution , to thereby evaluate the role of the gradient field of cardiac stimulation , the results show that the eddy current generated by the existing technical indicators in the MRI system under the most adverse circumstances is already very close to the abnormal myocardial cell stimulation threshold.

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CLC: > Medicine, health > Basic Medical > Medical science in general > Biomedical Engineering
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