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Knee-to-knee bioimpedance measurements to monitor changes in extracellular fluid in haemodynamic-unstable patients during dialysis

in hemodynamically stable patients. This study aimed at comparing the adequacy of kkBIS with whBIS in respect to continuous monitoring of extracellular fluid volume in hemodynamically unstable HD patients, and the usefulness of kkBIS for detecting the patient’s risk of IDH. The correlation between whBIS and kkBIS on the basis of changes in absolute extracellular resistance (R e ) and R e normalized for ultrafiltration volume (ΔR e /UFV) has been investigated. Finally, volume calculations from both methods were compared and their cumulative changes were

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Enhancing sharp features by locally relaxing regularization for reconstructed images in electrical impedance tomography

EIT data used for validation. Section 4 presents reconstructed images from simulated data, open EIT data and the data for papaya using DeTER. The enhancement in reconstructed images is quantitatively analyzed using Contrast to Noise Ratio (CNR), shape descriptor functions and corresponding correlation coefficients as well as relative size of reconstructed targets. Section 5 draws conclusions based on the results and brings out important implications of DeTER for EIT applications. Method Theoretical background of DeTER EIT estimates internal conductivity

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An efficient and automatic ECG arrhythmia diagnosis system using DWT and HOS features and entropy- based feature selection procedure

order statistics of a signal are not adequate to indicate the nonlinear features of signals, so in this analysis, third and fourth order cumulants, which are the third and fourth order correlation derived from Higher Order Spectrum (HOS) were used. Assume x(n) as a stationary data with discrete-time. The moments of x(n) exist up to the order n. So, the nth order moment function of x(n) is determined by: (1) m n x ( τ 1 , τ 2 , … , τ n − 1

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Possibilities in the application of machine learning on bioimpedance time-series

, Barth RJ, Jr., Rosenkranz KM, et al. The correlation of in vivo and ex vivo tissue dielectric properties to validate electromagnetic breast imaging: initial clinical experience. Physiological Measurement. 2009;30(6):S121-36. 10.1088/0967-3334/30/6/S08 19491436 Halter RJ Zhou T Meaney PM Hartov A Barth RJ Jr Rosenkranz KM et al The correlation of in vivo and ex vivo tissue dielectric properties to validate electromagnetic breast imaging: initial clinical experience Physiological Measurement

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Correlation of rheoencephalography and laser Doppler flow: a rat study

in CBF in the face of changing CPP. Pressure autoregulation can be monitored with ICM+ software [ 2 ]. Few studies have compared results of measurements made with REG to LDF measurements. Our study established a correlation between REG and LDF during transient CO 2 inhalation. The physical basis of REG is that blood and cerebrospinal fluid are better conductors than brain tissue. Consequently, increases in REG amplitude reflect increases in the amount of blood in the brain. The usefulness of REG for neuromonitoring compared to LDF is that (when used to measure

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Investigating the quasi-oscillatory behavior of electrical parameters with the concentration of D-glucose in aqueous solution

present in the system of an aqueous solution of glucose: the water-water, water-glucose and glucose-glucose interactions [ 18 , 19 ]. Therefore, the net polarization must be a function of the compositional concentration of glucose in the system. When an external electric field is applied to the system, the orientations of the molecular dipoles inside it play a pivotal role on the net polarization of the system [ 20 ]. In most of the theoretical models, the multi-body dipole correlations are not clearly explained and the orientations of dipoles relevant to the

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Estimation of body composition and water data depends on the bioelectrical impedance device

using Bland-Altman analyze with limits of agreement [ 28 ]. We applied intraclass correlation coefficient (ICC) to measure the strength of agreement and Pearson’s correlation to assess the association as previously proposed [ 29 , 30 ]. Regression analyze was performed to test the association between agreement with BMI and OH. Statistical significance was considered when p<0.05. Data analyze were performed using MINITAB, version 18. Results A total of 509 subjects were evaluated. Descriptive data are shown in Table 1 . PD (43% ≥60 years old) and HD (23% ≥60

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A new system for measuring electrical conductivity of water as a function of admittance

impedance (Z) in units of (Ohm) and its reciprocal admittance (Y) in units of Siemens (Ohm -1 ). Research concerning the use of admittance is infrequent. An exception is the work presented in [ 6 ] which used the concept of admittance for the first time to determine the conductivity of solid electrolytes. In this paper a new system for measuring the conductivity of water is proposed. The system utilizes the correlation between the conductivity of water and the electrophysical parameters (impedance and admittance). It does not require calibration to a reference sample

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Quantitative evaluation of blood glucose concentration using impedance sensing devices

by the correlation experiments are helpful to calculate the blood glucose concentration if other factors were known to the authors. Also these experiments help to design complex electrode geometries for further experiments [ 8 ]. In the first phase of the correlation experiment, the impedance data were fitted with the independent variables such as glucose concentration (100 to 400 mg/dL) and frequency (100 Hz to 1 MHz) for all the designs to establish the mathematical relationship between glucose concentration and impedance by using LAB Fit curve fitting software

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Cancer detection based on electrical impedance spectroscopy: A clinical study

.25 18.75 These results support the proposed idea of this research that the contralateral sites of body should have the same electrical properties unless there is a malignancy in one of the sites. Discussion In this study, the changes in electrical properties of living tissue were compared contra-laterally. The results illustrate the same behavior and the same linear correlation in contralateral parts of human subjects. This observation suggests that the correlation of electrical properties of one part of the body is the same as its contralateral part

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