融入颅骨电阻率非均匀分布信息的电阻抗断层成像方法  

An Electrical Impedance Tomography Imaging Method Incorporated with Inhomogeneously-Distributed Skull Resistivity

作　　者：杨滨[1] 徐灿华[1] 代萌[1] 史学涛[1] 付峰[1] 董秀珍[1] 

机构地区：[1]第四军医大学生物医学工程系,陕西西安710032

出　　处：《中国医疗设备》2015年第8期1-4,8,共5页China Medical Devices

基　　金：军队课题(AWS14C006;CWS12J102);国家自然科学基金(51207161);国家科技支撑计划(2011BAI08B13;2012BAI20B02)

摘　　要：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。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.

关 键 词：电阻抗断层成像 电阻率非均匀分布 模糊C均值聚类 

分 类 号：TM934.7[电气工程—电力电子与电力传动]