The effct of finire element mesh density on the measurement electrode voltage is analysed by using comsol. Considering the simulation data of Positive problem, we analysized the Astringency of conjugate gradient method.Using image reconstruction algorithm,by setting the conditionst of iteration stopping, we assessment the ability to distinguish respectively for the individual imaging object and a two imaging objecthe. Combined with the structure property of human chest tissue, we establish the precise simulation model of chest. Different image reconstruction by the conjugate gradient method based on a prion informations is also illustrated%利用Comsol软件分析有限元剖分的疏密对测量电极电压的影响,针对正问题仿真数据,对共轭梯度法收敛性进行分析,利用图像重建算法,采用设定的迭代停止条件分别针对单个成像对象和两个成像对象进行分辨能力的评估.结合人体胸部组织的结构特征,建立精确的胸部仿真模型.重点对基于先验信息的共轭梯度方法对不同情况的图像重建进行说明.
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