Imaging of regional conductivity change using planar EIT system

Зохиогч:  Ц.Мөнх-эрдэнэ

Хамтран зохиогч:

Үйл явц: Бичиж хэвлүүлсэн

Бүтээлийн товч тайлбар:

Electrical impedance tomography (EIT) produces non-invasive 2D cross sectional images of the admittivity distribution from 3D electrically conducting objects. EIT imaging has numerous applications in areas such as industry, geophysics, biomedicine, and so on. For instance, in industry it is used for control and analysis of industrial processes such as separation, mixing, or transportation of uids in vessels or pipes (Holden et al 1998); (Wang and Yin 2001), as well as crack detection and its unique determination (Alessandrini and Diaz Valenzuela 1996); (Kim and Seo 1996). In geophysics it is used to search for underground anomalies via resistivity or impedance, such as in the search for ground water (Nobes 1996). In the eld of biomedicine, EIT imaging plays an especially signi cant role. In EIT image, when the anomaly is away from measurement electrodes the reconstruction image is blurred and information of shape very weak. Most of conventional approaches are based on ill-conditioned matrix, therefore it is sensitive to geometry, measurement errors and so on. Moreover 3D case computation of reconstruction is really time consuming job. Furthermore in reality most observing domains in 3D, hence only measure the voltage 1D on boundary measurement, sometimes can not be sucient information to reconstruct. Because theoretically, the current and voltage boundary data are determined in continuous space. But in reality, it is impossible to place the electrodes continuously, which requires
that in nitely many electrodes should be placed on the boundary. This means the measurement data always lose information of the voltage distributions. Therefore to measure in boundary surface is reasonable,
which is 2D. We develop a new approach to reconstruct projection image from 3D to 2D. The main goal of EIT is to know interior admittivity distribution, which is depending of time, frequency and its position. Hence
we consider time di erence and frequency di erence admittivity imaging in section 3 and section 4. Applications of those di erence image technique for tumor detection, lung monitoring, cell crowing motion or shrinking motion and so on.

Хэвлүүлсэн газар: Korea, Seoul

Хэвлүүлсэн огноо: 2012/06/13

Хуудасний тоо: 200

Түлхүүр үг: #projection image reconstruction #application of EIT #Electrical impedance tomography


Бүтээл нэмсэн:Ц.Мөнх-эрдэнэ

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