Xia Li1, 2, JuCheng Zhang1, WenLong Xu1, XiaoFang Liu1, 2, BingQiao Xu1
1China Jiliang University, Hangzhou, Zhejiang, China; 2Zhejiang University, Hangzhou, Zhejiang, China
This work presents the electromagnetic properties of Koch fractal-shaped alternating impedance microstrip coil for ultra high field MRI. Based on the fractal theory, a first order Koch geometry microstrip coil was modeled and simulated. A conventional and two alternating impedance microstrip line coil was also simulated for comparison. Results indicate that, narrowing the width of high impedance sections will enhance magnetic field quantity but lead to less homogeneity. The Koch fractal-shaped alternating impedance microstrip coil shows less discontinuous of electric field at the joints of high-low impedance sections and lower electric field emission. The magnetic field peak of Koch fractal-shaped alternating impedance microstrip coil was found to be broadened, which gives a more uniform magnetic field distribution.
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