Rotational electrical impedance tomography using electrodes with limited surface coverage provides window for multimodal sensing
Rotational electrical impedance tomography using electrodes with limited surface coverage provides window for multimodal sensing
Electrical impedance tomography (EIT) is an imaging method that could become a valuable tool in multimodal applications. One challenge in simultaneous multimodal imaging is that typically the EIT electrodes cover a large portion of the object surface. This paper investigates the feasibility of rotational EIT (rEIT) in applications where electrodes cover only a limited angle of the surface of the object. In the studied rEIT, the object is rotated a full 360◦ during a set of measurements to increase the information content of the data. We call this approach Limited Angle Full Revolution rEIT (LAFR-rEIT). We test LAFR-rEIT setups in two-dimensional geometries with computational and experimental data. We use up to 256 rotational measurement positions, which requires a new way to solve the forward and inverse problem of rEIT. For this, we provide a modification, available for EIDORS, in the supplementary material. The computational results demonstrate that LAFR-rEIT with eight electrodes produce the same image quality as conventional 16-electrode rEIT, when data from an adequate number of rotational measurement positions are used. Both computational and experimental results indicate that the novel LAFR-rEIT provides good EIT with setups with limited surface coverage and a small number of electrodes.
Ulkoasu |
2742003 |
---|---|
Kieli |
englanti |
Aiheet |
213 Electronic, automation and communications engineering, electronics
213 Electronic, automation and communications engineering, electronicsHae aiheistaHae kaikista tiedoista |