Dual frequency electrical impedance tomography to obtain functional image

Sapuan, Imam; Ain, Khusnul; Suryanto, Alif

doi:10.1088/1742-6596/853/1/012002

“…This research requires two currents with a frequency of 10 kHz and 100 kHz. The dual frequencies appertain to the method used to detect abnormalities, which is using functional imagery [28,29]. However, this VCCS can produce stable currents for a wide frequency.…”

Section: Discussionmentioning

confidence: 99%

Anomaly Detection Using Electric Impedance Tomography Based on Real and Imaginary Images

Sapuan

¹

,

Yasin

²

,

Ain

³

et al. 2020

Sensors

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This research offers a method for separating the components of tissue impedance, namely resistance and capacitive reactance. Two objects that have similar impedance or low contrast can be improved through separating the real and imaginary images. This method requires an Electrical Impedance Tomography (EIT) device. EIT can obtain potential data and the phase angle between the current and the potential measured. In the future, the device is very suitable for imaging organs in the thorax and abdomen that have the same impedance but different resistance and capacitive reactance. This device consists of programmable generators, Voltage Controlled Current Source (VCCS), mulptiplexer-demultiplexer potential meters, and phase meters. Data collecting was done by employing neighboring, while reconstruction was used the linear back-projection method from two different data frequencies, namely 10 kHz and 100 kHz. Phantom used in this experiment consists of distillated water and a carrot as an anomaly. Potential and phase data from the device is reconstructed to produce impedance, real, and imaginary images. Image analysis is performed by comparing the three images to the phantom. The experimental results show that the device is reliable.

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“…The relative method has advantages compared to the iterative, namely it is fast and robust. Meanwhile, the weakness is obtaining reference data, but this can be overcome by taking data at a different frequency or time, which is known by the term, data of different frequency or time difference [17]. Therefore, in general, the relative method is used to compare one condition with another, so this method is very appropriate if used to obtain a functional image [16].…”

Section: Bulletin Of Electr Eng and Infmentioning

confidence: 99%

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

Choridah

¹

,

Rulaningtyas

²

,

Muqmiroh

³

et al. 2023

Bulletin EEI

0

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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.

show abstract

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

Choridah

¹

,

Rulaningtyas

²

,

Muqmiroh

³

et al. 2023

Bulletin EEI

0

View full text Add to dashboard Cite

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.

show abstract

Dual frequency electrical impedance tomography to obtain functional image

Cited by 4 publications

References 9 publications

Anomaly Detection Using Electric Impedance Tomography Based on Real and Imaginary Images

Anomaly Detection Using Electric Impedance Tomography Based on Real and Imaginary Images

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

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

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