26 research outputs found
Singularity image method for electrical impedance tomography of bubbly flows
A singularity image method is applied to the electrical impedance tomography of gasâliquid flows in a two-dimensional circular domain. Algorithms that use analytic complex functions, dipoles and the Milne-Thomson circle theorem are described. Numerical experiments are provided to demonstrate the robustness of this technique. Numerical results show excellent reconstruction properties.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/49106/2/ip3409.pd
Regularizing properties of a truncated newton-cg algorithm for nonlinear inverse problems
Using a priori information to improve on localization of conductivity changes in brain in electrical impedance tomography
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Experimental demonstration of high resolution three-dimensional x-ray holography
Tomographic x-ray holography may make possible the imaging of biological objects at high resolution in three dimensions. We performed a demonstration experiment with soft x-rays to explore the feasibility of this technique. Coherent 3.2-nm undulator radiation was used to record Fourier transform holograms of a microfabricated test object from various illumination angles. The holograms were numerically reconstructed according to the principles of diffraction tomography, yielding images of the object that are well resolved in three dimensions
COMPARISON OF DIRECT DIFFERENTIATION AND ADJOINT VARIABLE METHOD FOR ELECTRICAL IMPEDANCE IMAGING
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Experimental demonstration of high resolution three-dimensional x-ray holography
Tomographic x-ray holography may make possible the imaging of biological objects at high resolution in three dimensions. We performed a demonstration experiment with soft x-rays to explore the feasibility of this technique. Coherent 3.2-nm undulator radiation was used to record Fourier transform holograms of a microfabricated test object from various illumination angles. The holograms were numerically reconstructed according to the principles of diffraction tomography, yielding images of the object that are well resolved in three dimensions