Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Tadesse Yontan PDF A APPROVED.pdf (5.68 MB)

ETD Abstract Container

Abstract Header

The Electromagnetic Simulation of Birdcage Coils for MRI based on Finite Element Method

Tadesse, Yonatan Abebe
http://rave.ohiolink.edu/etdc/view?acc_num=ysu1484137190762487

Abstract Details

2016, Master of Science in Engineering, Youngstown State University, Department of Electrical and Computer Engineering.
Radio frequency birdcage coils are widely used in clinical magnetic resonance imaging. In order to effectively design a birdcage coil, optimum capacitance calculation on the rungs or end rings is critical. Several methods are discussed in this thesis to calculate the capacitance. The first method is called lumped circuit element method, which is a commonly used technique to calculate the capacitance and resonant modes. However, the RF coil design begins to fail under quasi-static assumption as the frequency increases. Therefore, to accurately determine the capacitance, we use frequency domain analysis method for both the low-pass and high-pass birdcage coils in COMSOL Multiphysics. Modeling the birdcage coil in a 3D simulation environment helps to analyze the electromagnetic field and absorbed power in the volume of interest, such as field homogeneity, circularity, and specific absorption rate (SAR). In order to verify the optimal capacitance value, a computer program (Birdcage Builder) is used based on the model designed. Four frequencies are considered for the simulation, 64 MHz, 127.5 MHz, 170 MHz and 200 MHz corresponding to 1.5 T, 3 T, 4 T and 4.7 T MRI systems respectively.
Lin Sun, PhD (Advisor)
Philip Munro, PhD (Committee Member)
Frank Li, PhD (Committee Member)
67 p.
Electrical Engineering
Birdcage Coil; Radio Frequency; Low-pass; High-pass; Field homogeneity; Specific Absorption Rate; Optimal Capacitance; Current distribution

Recommended Citations

Citations

  • Tadesse, Y. A. (2016). The Electromagnetic Simulation of Birdcage Coils for MRI based on Finite Element Method [Master's thesis, Youngstown State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1484137190762487

    APA Style (7th edition)

  • Tadesse, Yonatan. The Electromagnetic Simulation of Birdcage Coils for MRI based on Finite Element Method. 2016. Youngstown State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ysu1484137190762487.

    MLA Style (8th edition)

  • Tadesse, Yonatan. "The Electromagnetic Simulation of Birdcage Coils for MRI based on Finite Element Method." Master's thesis, Youngstown State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1484137190762487

    Chicago Manual of Style (17th edition)

ysu1484137190762487
4,960
© 2016, all rights reserved.
This open access ETD is published by Youngstown State University and OhioLINK.