融入颅骨电阻率非均匀分布信息的电阻抗断层成像方法

摘要

An electrical impedance tomography imaging method incorporated with inhomogeneously-distributed skull resistivity was put forward in the paper, which made use of the anatomical information segmented from brain CT as well as the statistical parameter model of the diploe thickness and skull resistivity to establish a two dimensional brain finite element model containing inhomogeneously-distributed skull resistivity. A novel damped least squares incorporated with this model was used for simulation studies. According to the preliminary simulation experimental results, this imaging method showed its effectiveness in improved quality of reconstructed images and enhanced positioning accuracy of the imaging target.%本文提出一种融入颅骨电阻率非均匀分布信息的电阻抗断层成像方法.利用头部CT数据提供的解剖结构信息以及颅骨板障层厚度同颅骨电阻率的统计参数模型建立包含颅骨电阻率非均匀分布的头部二维有限元模型,并将模型引入阻尼最小二乘成像算法.初步仿真实验表明该方法提高了重构图像的质量和成像目标的定位精度.