Electrical impedance tomography with compensation for electrode positioning variations
| Autor: | G J Daniell, B H Blott, S Meeson |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Materials science
Radiological and Ultrasound Technology business.industry Acoustics Biophysics Iterative reconstruction Models Theoretical Biophysical Phenomena Compensation (engineering) Electrode Electric Impedance Image Processing Computer-Assisted Humans Computer Simulation Radiology Nuclear Medicine and imaging Computer vision Sensitivity (control systems) Artificial intelligence Tomography business Electrodes Electrical impedance tomography Electrical impedance Smoothing |
| Zdroj: | Physics in Medicine and Biology. 43:1731-1739 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/0031-9155/43/6/025 |
| Popis: | Ideally electrical impedance tomography (EIT) should not be oversensitive to electrode positions, but this conflicts with efforts to produce high-resolution images. Two procedures are presented that balance reducing the sensitivity to electrode position errors with generating practicable EIT images. The first provides a criterion based on electrode sensitivity for regularizing the reconstruction through spectral expansion. The main consequences of this are that smoother images are produced and the number of artefacts and their magnitude are generally reduced. The second modification uses the recorded data to compensate for electrode movements that have occurred after the reference data were measured. Image smoothness is used as the criterion for the readjustment. Computer simulation tests have shown that this modification produces improved image fidelity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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