Lung Ventilation Reconstruction by Electrical Impedance Tomography Based on Physical Information

Chen, X.Y.; Wang, H.X.; Newell, J.C.

doi:10.1109/icmtma.2011.409

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…The cross-section of a subject body has been often simplified as a circular shape (Zhang et al 2012). In the most accurate cases, the torso boundary shape was segmented from a CT scan (Chen et al 2011, Nebuya et al 2015, which was performed by clinicians for other purposes. However, whenever such contour is assumed to be the same for a range of patients a shape mismatch is included in the analysis, introducing artefacts.…”

Section: Discussionmentioning

confidence: 99%

Torso shape detection to improve lung monitoring

et al. 2018

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As a result, the accelerometers are more versatile than bend sensors, which cannot be used on bigger cross-sections. The computational study estimates the optimal number of accelerometers required in order to generate an image reconstruction comparable to the use of a CT scan as the forward model. Furthermore, since the patient position is crucial to monitoring lung ventilation, the orientation of the phantoms is automatically detected by the accelerometer-based method.

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Section: Discussionmentioning

confidence: 99%

Torso shape detection to improve lung monitoring

et al. 2018

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“…Generally [S] T [S] is a singular matrix therefore the matrix has no inverse. The problem can be solved by using the Tikhonov formula for regularization [22]. where  is the parameter of regularisation and I is the identity matrix.…”

Section: Methods 21 Relative Image Reconstruction Methodsmentioning

confidence: 99%

Detection of lung disease using relative reconstruction method in electrical impedance tomography system

et al. 2023

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Lung disease can be diagnosed with the image-based medical devices, including radiography, computed tomography, and magnetic resonance imaging. The devices are very expensive and have negative effects. An alternative device is electrical impedance tomography (EIT). The advantages of EIT arelow cost, fast, real-time, and free radiation, so it is very appropriate to be used as a monitoring device. The relative reconstruction method has succeeded in producing functional images of lung anomalies by simulation. In this study, the relative reconstruction method was used to obtain functional images of four lungs conditions, namely a healthy person, patient with left lung tumor with organized left pleural effusion, one with pulmonary tuberculosis with right pneumothorax and one with pulmonary tuberculosis with left pleural effusion. The relative reconstruction method can be used to obtain functional images of an individual’s lung conditions by using expiratory-respiratory potential data with results that can distinguish between the lungs of a healthy person and a diseased patient, but the position of the lung disease may have less details. The potential data from comparison between the data of a patient and a healthy person can be used as a reference to obtain more accurate functional image information of lung disease.

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“…Reconstruction was done using the relative reconstruction method from FVM forward problem [18], which makes the multifrequency electrical impedance tomography device suitable for breast cancer detection. Relative method assumes that the potential change boundary is a linear function of the change in conductivity [30,31]. The relative reconstruction methods can be written as…”

Section: Methodsmentioning

confidence: 99%

Development of Multi Frequency Electrical Impedance Tomography for Rectangular Geometry by Finite Volume Methods

et al. 2022

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Electrical impedance tomography (EIT) is a non-invasive technique for imaging the electrical conductivity and permittivity in the body by measuring the electrical potential on the surface. One of the EIT applications in the medical field is breast cancer detection. The study proposed a rectangular geometry EIT multi-frequency device based on the Finite Volume Method (FVM) reconstruction method. This device can be used to complement mammography images into dual EIT-mammography modalities. The EIT device built of DDS AD9850 as a programmable multi-frequency sinusoidal generator, AD620 as instrument amplifier, AD536 as an AC converter, and ADS1115 as an ADC 16 bit. These devices can scan at the maximum frequency of 100 kHz. The device has been tested with a phantom of distilled water and carrots in the center and on the sides. The reconstruction methods one step different frequency produces a rectangular geometric image with anomalies in the depth and at the surface clearly.

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Lung Ventilation Reconstruction by Electrical Impedance Tomography Based on Physical Information

Cited by 8 publications

References 8 publications

Torso shape detection to improve lung monitoring

Torso shape detection to improve lung monitoring

Detection of lung disease using relative reconstruction method in electrical impedance tomography system

Development of Multi Frequency Electrical Impedance Tomography for Rectangular Geometry by Finite Volume Methods

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