Simulation of Electromagnetic Effects in Magnetic Resonance Imaging

In this thesis, these three techniques are used to investigate the interaction between the electromagnetic field and a human head. The FEM finds its efficient application in solving small but very complicated problems. The MoM-based biconjugate fast Fourier transform (BCG-FFT) technique, which dramatically reduces the computational memory requirement and the computational time, is employed to analyze the open RF coils in an MRI system. The FD-TD method, known for its ability to handle large and complex geometries, is applied to shielded birdcage coil analysis. Besides studying the field information inside the human head, the RF coil's resonant frequency shift due to the biological loading and the SNR of RF surface coils are also investigated in this thesis. It is expected that the EM solver can be combined with the heat transform equation to simulate the heating pattern inside biological objects. The EM solver can also be applied together with Bloch's equation to provide more detailed pictures of the NMR phenomenon.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Chen, Ji

Contributors dc:contributor

• Jin, Jianming

• Engineering, Electronics and Electrical

Language dc:language

eng

Identifier

(MiAaPQ)AAI9912211

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/81260