Journal
2019 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE (I2MTC)
Volume -, Issue -, Pages 1180-1184Publisher
IEEE
DOI: 10.1109/i2mtc.2019.8826844
Keywords
Electrical Impedance Tomography; 3D image reconstruction; Jacobian matrix; Excitation pattern; Neighboring method
Funding
- National Natural Science Foundation of China [61801013, 61522102]
- China Postdoctoral Science Foundation [2018M640039]
- National Postdoctoral Program for Innovative Talents [BX201700021]
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Electrical impedance tomography (EIT) has been used for breast cancer detection as a complementary technique to mammography and magnetic resonance imaging (MRI). Three-dimensional (3D) EIT is being investigated with the improvement of instrumentation and numerical modeling. In this paper, a hemisphere breast model and a three-layer electrode distribution for 3D EIT are used. The excitation patterns in 3D EIT based on one current source, including the traditional neighboring method and opposite method are discussed and then a s-shaped method is proposed. Numerical experiments are carried out to analyze the singularity of the Jacobian matrix, dynamic range of the measured voltage and image quality, which are obtained by using different excitation methods. The results show that the proposed s-shaped method can provide low dynamic range of the measured voltage and good visual shape reconstruction for breast imaging.
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