A New Head Phantom With Realistic Shape and Spatially Varying Skull Resistivity Distribution

作者：Jianbo Li, Meng‐Xing Tang, Xiuzhen Dong, Chi Tang, Meng Dai, Geng Liu, Xuetao Shi, Bin Yang, Canhua Xu, Feng Fu, Fusheng You · 发表于：IEEE Transactions on Biomedical Engineering · 年份：2013 · DOI：10.1109/tbme.2013.2288133 · 被引用次数：30 · 研究领域：Electrical and Bioimpedance Tomography、Microwave Imaging and Scattering Analysis、Microfluidic and Bio-sensing Technologies

Brain electrical impedance tomography (EIT) is an emerging method for monitoring brain injuries. To effectively evaluate brain EIT systems and reconstruction algorithms, we have developed a novel head phantom that features realistic anatomy and spatially varying skull resistivity. The head phantom was created with three layers, representing scalp, skull, and brain tissues. The fabrication process entailed 3-D printing of the anatomical geometry for mold creation followed by casting to ensure high geometrical precision and accuracy of the resistivity distribution. We evaluated the accuracy and stability of the phantom. Results showed that the head phantom achieved high geometric accuracy, accurate skull resistivity values, and good stability over time and in the frequency domain. Experimental impedance reconstructions performed using the head phantom and computer simulations were found to be consistent for the same perturbation object. In conclusion, this new phantom could provide a more accurate test platform for brain EIT research.