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Cardiac mapping of electrical impedance tomography by means of a wavelet model

World Journal of Cardiovascular Diseases 2013年第7期3卷 464-470页

作者： Harki Tanaka Neli Regina Siqueira Ortega Andre Hovnanian Carlos Roberto Ribeiro de Carvalho Marcelo Britto Passos Amato Center of engineering Modelling and Applied Social Sciences Federal University of ABC Sao Paulo Brazil Center of Fuzzy Systems in Health School of Medicine University of Sao Paulo Sao Paulo Brazil Respiratory Intensive Care Unit Hospital das Clínicas School of Medicine University of Sao Paulo Sao Paulo Brazil

To improve the identification of cardiac regions in Electrical impedance tomography (eit) pulmonary perfusion images, a model of wavelet transform was developed. The main goal was to generate maps of the heart using eit images in a controlled animal experiment using a healthy pig and in two human volunteers. The model was capable of identifying the heart regions, demonstrated robustness and generated satisfactory results. The pig images were compared to perfusion images obtained using injection of a hypertonic solution and achieved an average area of the ROC curve of 0.88. The human images were qualitatively compared with Computerized Tomography scan (CT-scan) images.

关键词： Electrical Impedance Tomography Heart Image Analysis Image Segmentation Wavelet

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Primary Research of eit Inverse Problem Based on CS （Compressed Sensing） Technique

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Journal of Mathematics and System Science 2013年第1期3卷 41-46页

作者： CHANG Tiantian DAI Meng XU Canhua FU Feng YOU Fusheng DONG Xiuzhen School of Biomedical engineering Fourth Military Medical University Xi 'an 710032 China

eit (electrical impedance tomography) problem should be represented by a group of partial differential equation, in numerical calculation: the nonlinear problem should be linearization approximately, and then linear equations set is obtained, so eit image reconstruct problem should be considered as a classical ill-posed, ill-conditioned, linear inverse problem. Its biggest problem is the number of unknown is much more than the number of the equations, this result in the low imaging quality. Especially, it can not imaging in center area. For this problem, we induce the CS technique into eit image reconstruction algorithm. The main contributions in this paper are: firstly, built up the relationship between CS and eit definitely; secondly, sparse reconstruction is a critical step in CS, built up a general sparse regularization model based on eit; finally, gives out some eit imaging models based on sparse regularization method. For different scenarios, compared with traditional Tikhonov regularization (smooth regularization) method, sparse reconstruction method is not only better at anti-noise, and imaging in center area, but also faster and better resolution.

关键词：企业所得税逆问题 CS Tikhonov正则化技术电阻抗成像非线性问题偏微分方程

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A low noise, high fidelity cross phase modulation in multi-level atomic medium

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Chinese Physics B 2021年第11期30卷 343-347页

作者：王亮伟关佳朱成杰李润兵石兢 Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan UniversityWuhan 430072China School of Physics Science and engineering Tongji UniversityShanghai 200092China School of Physical Science and Technology Soochow UniversitySuzhou 215006China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071China

We develop a hybrid scheme of cross phase modulation based on electromagnetically induced transparency(eit)and active Raman gain(ARG)in a multi-level atomic *** cross phase modulation,with low loss and without noise,is demonstrated in a room-temperature ^(85)Rb *** show that a p radian nonlinear Kerr phase shift of the signal light relative to a reference light is observed when the signal light is modulated by the phase control field with the low light *** also show that the linear and the third-order absorption can be eliminated via the Raman gain,and the phase noise of the signal light can be ignored when the phase control light is applied in this hybrid scheme.

关键词： phase modulation electromagnetically induced transparency nonlinear Kerr phase shift

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原位监测老鼠肿瘤的电穿孔电场分布

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国际医学放射学杂志 2015年第2期 167-167页

作者： M.Kranjc B.Markelc F.Bajd M.emaar I.Sera T.Blagus 李宁 Faculty of Electrical engineering University of Ljubljana Traka 25 SI-1000 Ljubljana Slovenia

摘要目的评估MR电阻抗层析成像(eit)技术原位监测老鼠体内肿瘤电穿孔的电场分布并用于预测可逆性电穿孔肿瘤区域的可靠性。材料与方法所有实验获得机构动物

关键词：电穿孔电转染肿瘤区域原位监测电场分布老鼠

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