Bartłomiej Grychtol

Documents:

  • 2014-04-24
    On April 24–26 2014, the 15th International Conference on Biomedical Applications of Electrical Impedance Tomography (EIT 2014) takes place at the Glen House Resort in Gananoque, Canada. Exciting developments are taking place in EIT: developments in hardware, software, and reconstruction algorithms, and new clinical applications and better understanding of the current ones. This paper introduces this fascinating conference.

  • 2014-04-24
    Electrical impedance tomography (EIT) creates tomographic images from surface electrical stimulation and measurement. Many research and commercial devices have been made, with correspondingly many data formats, which negatively impacts the ability to share data. To address this issue, we have developed the OEIT data format, an XMLbased flexible container format for EIT data. We describe its features and structure.

  • 2014-04-24
    Image reconstruction in electrical impedance tomography is sensitive to errors in the (forward) model of the measurement system. We propose a new approach, based on the GREIT algorithm, where the reconstruction matrix is trained on real rather than simulated data, obviating the need for an accurate numerical forward model. We observe a substantial improvement in image quality, particularly for changes close to the boundary.

  • 2014-04-24
    The electrical resistivity distribution at the base of La Soufrière of Guadeloupe lava dome is reconstructed by using transmission electrical resistivity data obtained by injecting an electric current between pairs of electrodes on opposing sides of the volcano. The data are inverted to perform a slice electrical resistivity tomography (SERT). The resulting image shows the presence of highly conductive regions separated by resistive ridges.

  • 2014-04-25
    This paper presents a new image reconstruction technique for 3D EIT based on the extension of the 2D GREIT method. Key aspects include the expansion of optimization targets and set of desired images to cover multiple planes. Results show the reduction off-plane interference seen in 2D reconstruction. The selection of target planes is also found to be highly significant to the image.

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