Alzheimer's disease (AD) is a progressive and irreversible brain degenerative disorder. Mild cognitive impairment (MCI) clinical precursor of AD. Although some treatments can delay its progression, no effective cures are available for Accurate early-stage diagnosis AD vital the prevention intervention progression. Hippocampus one first affected regions in To help diagnosis, shape volume hippocampus often measured using structural magnetic resonance imaging (MRI). However, these features...

This paper presents the development of a new electrical impedance tomography system for online measurement two-phase flows with axial velocities up to 10 ms/sup -1/. The is designed in modular fashion and can consist several data acquisition modules computing modules. module includes voltage controlled current source direct-current-restoration circuit, an equal-width pulse synthesizer unit synchronized digital demodulation unit. A concept switching scheme developed enhance ac coupling speed....

Abstract Objective. Electrical impedance tomography (EIT) generates cross-sectional images through non-invasive measurements from surface electrodes. While above 200 kHz can reveal intracellular properties, most existing EIT are published at frequencies below kHz. When exceed kHz, the accuracy of declines due to influence distributed circuit parameters such as parasitic capacitance, on-resistance switch and series inductance, with a more significant impact on larger impedance. To overcome...

An electrical impedance tomography (EIT) system based on frequency division multiplexing (FDM) is proposed for real-time lung physiological imaging. The FDM technique allows the integration of 13 dedicated voltage sensing channels by combining data on-chip and sharing ADC to alleviate area penalty caused multi-channel. EIT system-on-chip (SoC) following features. 1) Early I/Q demodulation relax bandwidth requirement analog front end minimize impact motion artifacts dc electrode offset. 2)...

The advantages of noninvasive, fast speed, low-cost, and nonionizing radiation hazard have made electrical impedance tomography (EIT) an attractive imaging technology in geological, medical, industrial applications. However, the EIT image has low spatial resolution due to limited number independent measurements soft-field property. Focused on fact that, some applications, conductivity variation exists only part sensing field, this paper proposes a new strategy enhance quality by restricting...

In recent decades, rapid urbanization has been linked to negative impacts on people’s mental health. However, the healing potential of urban parks as central features cityscapes not fully explored from perspective audio-visual integration. This gap limits designers’ ability leverage parks’ systems their full potential. To address this gap, study used Mindwave monitoring and recovery component scale evaluate function in Chengdu, specifically focusing Based scene combination samples collected...

Electrical-impedance tomography (EIT) has been reported as the only viable wearable real-time method for lung imaging [1]. Previous EIT chips generally employ Time-Division Multiplexing (TDM) or active electrode to facilitate multi-channel read-out [2]–[4], and support a large number of electrodes by sharing maximum 6 parallel readout channels per chip. In this paper, we present an EIT-SoC with following features: 1) early demodulation relax bandwidth requirement analog front-end, minimize...

Lane detection is very important for self-driving vehicles. In recent years, computer stereo vision has been prevalently used to enhance the accuracy of lane systems. This paper mainly presents a multiple algorithm developed based on optimised dense disparity map estimation, where information obtained at time tn utilised optimise process estimation t <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">n</sub> (n ≥ 0). achieved by estimating road...

Abstract Objective. Impedance pneumography (IP) has provided static assessments of subjects’ breathing patterns in previous studies. Evaluating the feasibility and limitation ambulatory IP based respiratory monitoring needs further investigation on clinically relevant exercise designs. The aim this study was to evaluate capacity an advanced monitoring, its predictive value independent ventilatory quantification during cardiopulmonary testing (CPET). Approach. 35 volunteers were examined with...

An electrical impedance tomography (EIT) sensor's model for analyses of the behaviour coupling circuits and electrode–electrolyte interface is presented. With transient time model, a novel switching scheme, termed over-zero (OZS) was designed to eliminate both dc offset potential charged residual measurements. The effects in conventional OZS were simulated. Both simulations revealed that can be dramatically reduced by employment scheme. technique has been used fast system achieve speed more...

Computed tomography (CT) technology is a classic medical diagnostic tool. The extraction of ts image information has great clinical significance. With the study CT boundary contour extraction, an improved OTSU's method which combines adaptive threshold segmentation with edge detection invented. This can calculate optimal automatically, simply and quickly. And extracted outline clear accurate. proposed been coded in MATLAB tested by sets images. results show that strong robustness be applied...

This paper aims to present a proof-of-concept for novel piezoelectric motor using single-phase driving signal. The stator is constructed by bonding Terfenol-D plate and ceramic (PZT) onto the outer surface of metal base. PZT based on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>d</mml:mi></mml:mrow><mml:mrow><mml:mn>31</mml:mn></mml:mrow></mml:msub></mml:math> effect used simultaneously excite two in-plane bending modes stator. Similarly, can also be...

Electrical Impedance Tomography (EIT) is a kind of functional imaging technology which has great potential for tumor diagnosis, and physiological process monitoring. This article introduces prototype design semi-parallel EIT data acquisition system with the purpose ease hardware upgrades scalability. The consists one control module an expandable number independent front-end modules. Compared most existing systems, newly developed features symmetric parallel signal conditional circuits. All...

As the Golden Standard for clinical pulmonary function examination, spirometer examination requires a facemask and nose clip to be worn. It generally takes half an hour or more examine one patient. In addition, it needs operator having rich experiences patients cooperate well. A convenient effective evaluation tool is strongly demanded in routine examination. Existing research results suggest that, thoracic impedance varies with vital capacity shows good correlation capacity. Thoracic...

This paper reported an ultrasonic motor using the 1st longitudinal and 2nd torsional (L-T) modes. The stator slots were useful to tune resonance frequencies increased L-T displacements largely. By cutting slots, which determined number of oscillators, whole was changed into independent vibrators. more vibrators, bigger power it outputs. possessing different vibrators can realize frequency tuning by increasing outer diameter. Piezoelectric elements pasted on surface metal substrate. hybrid...