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Porcelain of the National Palace Museum / [compiled by the Joint Board of Directors of the National Palace Museum and the National Central Museum]

Electrical impedance tomography (EIT) is a radiation-free and noninvasive medical image reconstruction technique in which a current is injected and the reflected voltage is received through electrodes. EIT electrodes require good connection with the skin for data acquisition and image reconstruction. However, detached electrodes are a common occurrence and cause measurement errors in EIT clinical applications. To address these issues, in this study, we proposed a method for detecting faulty electrodes using the differential voltage value of the detached electrode in an EIT system. Additionally, we proposed the voltage-replace and voltage-shift methods to compensate for invalid data from the faulty electrodes. In this study, we present the simulation, experimental, and in vivo chest results of our proposed methods to verify and evaluate the feasibility of this approach.

Sensors (Basel, Switzerland), 2022-12, Vol.22 (24), p.9575

Compensation for Electrode Detachment in Electrical Impedance Tomography with Wearable Textile Electrodes

Electrical impedance tomography (EIT), a noninvasive and radiation-free medical imaging technique, has been used for continuous real-time regional lung aeration. However, adhesive electrodes could cause discomfort and increase the risk of skin injury during prolonged measurement. Additionally, the conductive gel between the electrodes and skin could evaporate in long-term usage and deteriorate the signal quality. To address these issues, in this work, textile electrodes integrated with a clothing belt are proposed to achieve EIT lung imaging along with a custom portable EIT system. The simulation and experimental results have verified the validity of the proposed portable EIT system. Furthermore, the imaging results of using the proposed textile electrodes were compared with commercial electrocardiogram electrodes to evaluate their performance.

Sensors (Basel, Switzerland), 2021-10, Vol.21 (20), p.6789

Dry Wearable Textile Electrodes for Portable Electrical Impedance Tomography

Handheld ultrasound devices have been widely used for diagnostic applications. The use of the acoustic-field beamforming (AFB) method has been proposed for handheld ultrasound to reduce electricity consumption and avoid battery and unwanted heat issues. However, the image quality, such as the contrast ratio and contrast-to-noise-ratio, are poorer with this technique than with the conventional delay-and-sum method. To address the problems associated with the worse image quality in AFB imaging, in this paper we propose the use of an AFB-based generalized coherence factor (GCF) technique, in which the GCF weighting developed for adaptive beamforming is extended to AFB. Simulation data, experimental results, and in vivo testing verified the efficacy of our proposed AFB-based GCF technique.

Applied sciences, 2022-01, Vol.12 (2), p.560

Acoustic-Field Beamforming-Based Generalized Coherence Factor for Handheld Ultrasound

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Porcelain of the National Palace Museum / [compiled by the Joint Board of Directors of the National Palace Museum and the National Central Museum]

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Compensation for Electrode Detachment in Electrical Impedance Tomography with Wearable Textile Electrodes

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Export record to excel

Dry Wearable Textile Electrodes for Portable Electrical Impedance Tomography

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Acoustic-Field Beamforming-Based Generalized Coherence Factor for Handheld Ultrasound

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