Simulation and Verification of Magnetic Field Gradient Waveforms in the Presence of a Metallic Vessel in Magnetic Resonance Imaging
作者： Frédéric G. Goora , Han Hui , Bruce G. Colpitts , Bruce J. Balcom
DOI: 10.1109/TMAG.2012.2196051
关键词: Physics of magnetic resonance imaging 、 Electromagnetic coil 、 Magnetostatics 、 Eddy current 、 Magnetic field 、 Magnetic energy 、 Electromagnet 、 Computational physics 、 Physics 、 Superconducting magnet 、 Nuclear magnetic resonance
摘要: We present simulation and experimental results regarding the generation of eddy currents due to switched magnetic field gradients during use metallic vessels in high-pressure resonance imaging (MRI) applications. The induced result a corruption applied gradient as experienced by object being imaged. Simulations using CST EM Studio™ have revealed spatial distribution temporal evolution currents, resulting fields, their dependence on vessel material orientation gradient. been compared measured data with excellent agreement. Agreement between simulated permits increasingly sophisticated models be developed such that reliably guide design improved metal vessels.
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