Adaptive Electric Current Computed Tomography System

该提案旨在继续设计，建造， 电流计算机断层扫描原型的测试 （EECT）系统。 这个系统将电流模式 通过身体表面上的电极阵列，以及 记录这些电极上产生的电压。 从这些 测量电压系统生成并显示 近似重建的电导率内 身体 为了达到理论上预测的 最大信噪比，该系统是自适应的， 感觉到施加到身体上的电流的连续模式 根据先前的电压测量值确定， 优化重构算法 这项拟议中的研究对工程和 医学成像将证明一个自适应系统 可以被建造和制作，以产生图像结构， PI理论预测的分辨率。 长期 影响将是产生更高分辨率的阻抗 成像系统比现有的方法可能。 更高分辨率的系统将产生更强大的诊断 医学工具，以及更有用的成像技术， 无损检测、地球物理勘探和流通 多孔介质。

This proposal seeks to continue the design, construction, and testing of a prototype electric current computed tomography (EECT) system. This system applies patterns of electric current through an array of electrodes on the surface of a body, and records the voltages that result on those electrodes. From these measured voltages the system generates and displays an approximate reconstruction of the electrical conductivity within the body. In order to achieve the theoretically predicted maximum signal-to-noise ratio, this system is adaptive in the sense that the successive patterns of current applied to the body are determined from the previous voltage measurements and the optimization-reconstruction algorithm. The immediate impact of this proposed research on engineering and medical imaging will be the demonstration that an adaptive system can be built and made to yield image constructions that achieve the resolution predicted by the PI's theory. The long term impact will be the creation of higher resolution impedance imaging systems than are possible with existing processes. Higher resolution systems will yield more powerful diagnostic tools in medicine, as well as more useful imaging techniques in nondestructive testing, geophysical exploration, and flow through porous media.