RECONSTRUCTION OF MICROWAVE ABSORPTION PROPERTIES IN HETEROGENEOUS TISSUE FOR MICROWAVE-INDUCED THERMO-ACOUSTIC TOMOGRAPHY

• DOI: 10.2528/pier12062704
• Publication Date: 2014-01-13T09:23:53Z
• Authors: Jinguo Wang; Zhiqin Zhao; Jian Song; Xiaozhang Zhu; Zai-Ping Nie; Qing Huo Liu
• Keywords: 0206 medical engineering; 02 engineering and technology

Aiming to efficiently overcome the acoustic refraction and accurately reconstruct microwave absorption properties in heterogeneous tissue, an iterative reconstruction method is proposed for microwave-induced thermo-acoustic tomography (MITAT) system.Most current imaging methods MITAT assume that sound velocity (SV) distribution obeys a simple Gaussian distribution.In real problem, biological tissue may have several different inclusions with SV this case, must be taken into account.The consisted of engine time reversal mirror (TRM), fast marching (FMM) simultaneous algebraic technique (SART).This utilizes TRM, FMM SART estimate solve phase distortion problem caused by effect needs little prior knowledge tissue.The has great advantages both spatial resolution contrast tumors acoustically medium.Some numerical simulation results are given demonstrate excellent performance method.