IEEE Trans Biomed Eng. 2014 Feb;61(2):254-63. doi: 10.1109/TBME.2013.2288133.
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.
脑电阻抗断层成像（EIT）是一种新兴的监测脑损伤的方法。为了有效地评估脑 EIT 系统和重建算法，我们开发了一种新型的头模，具有逼真的解剖结构和空间变化的颅骨电阻率。头模由三层组成，分别代表头皮、颅骨和脑组织。制作过程包括 3D 打印解剖几何形状以创建模具，然后进行铸造，以确保几何精度和电阻率分布的准确性。我们评估了幻影的准确性和稳定性。结果表明，头模具有较高的几何精度、准确的颅骨电阻率值以及随时间和频率域的良好稳定性。对头模和计算机模拟进行的实验阻抗重建结果表明，对于相同的扰动物体，结果具有一致性。总之，这种新型头模可以为脑 EIT 研究提供更准确的测试平台。
