Correlation between maximal radial muscle displacement and stiffness in gastrocnemius muscle.

abstract：:This paper represents a reconstruction algorithm using a direct sensitivity matrix (DSM) approach for fast 3D image reconstruction in electrical impedance imaging. The boundary element method (BEM) is used in the construction of this matrix. The first images of a conductivity perturbation inside a sphere are reconstru...

journal_title：Physiological measurement

authors： Morucci JP,Granié M,Lei M,Chabert M,Marsili PM

更新日期：1995-08-01 00:00:00

abstract：:Neural gastric electrical stimulation (NGES) is a new method for invoking gastric contractions under microprocessor control. However, optimization of this technique using feedback mechanisms to minimize power consumption and maximize effectiveness has been lacking. The present pilot study proposes a prototype feedback...

journal_title：Physiological measurement

authors： Aelen P,Jurkov A,Aulanier A,Mintchev MP

更新日期：2009-03-01 00:00:00

abstract：:In recent AASM practice, parameter actimetry is cited to measure total sleep time in obstructive sleep apnoea patients, when polysomnography is not available. An actigraph was therefore compared to polysomnographic data in 28 subjects with known sleep disordered breathing. Total sleep time (TST), sleep period time (SP...

journal_title：Physiological measurement

authors： Dick R,Penzel T,Fietze I,Partinen M,Hein H,Schulz J

更新日期：2010-12-01 00:00:00

abstract：OBJECTIVE:Though the mutual influence of cardiovascular and respiratory rhythms in healthy newborns has been documented, its full characterization is still pending. In general, the activity of many physiological subsystems has a well-expressed rhythmic character, and often an interdependency between physiological rhyth...

journal_title：Physiological measurement

authors： Lucchini M,Pini N,Fifer WP,Burtchen N,Signorini MG

更新日期：2018-06-19 00:00:00

abstract：:Several factors affect the viability of biosensor design. A computer-based model is being developed to enable the sources and effect of noise and variability within the sensor to be analysed. The work now presented details the modelling of the biochemical aspect of the biosensor model-the immunoassay. The equilibrium ...

journal_title：Physiological measurement

authors： Keating SM,Flanagan MT

更新日期：2001-08-01 00:00:00

abstract：OBJECTIVE:Eye-tracking devices have become widely used as clinical assessment tools in a variety of applied-scientific fields to measure saccadic eye movements. With the emergence of multiple static and dynamic devices, the concurrent need for algorithm development and validation is paramount. APPROACH:This review ass...

journal_title：Physiological measurement

authors： Stuart S,Hickey A,Vitorio R,Welman K,Foo S,Keen D,Godfrey A

更新日期：2019-02-26 00:00:00

abstract：:The main components responsible for the mechanical behavior of the arterial wall are collagen, elastin, and smooth muscle cells (SMCs) in the medial layer. We determined the structural and mechanical changes in porcine carotid arteries after administration of Triton® X-100, elastase, and collagenase using the inflatio...

journal_title：Physiological measurement

authors： Kochová P,Kuncová J,Svíglerová J,Cimrman R,Miklíková M,Liška V,Tonar Z

更新日期：2012-08-01 00:00:00

abstract：:Acupuncture (ACU) is known to be effective in ischemia treatment, and glutamate (GLU) excitotoxicity is an important factor in neuronal cell death. We observed the effect of ACU on cerebral blood flow (%CBF) and DeltaGLU (the changes in GLU release) in the ischemic stroke rat model of diabetic mellitus (DM). A global ...

journal_title：Physiological measurement

authors： Choi S,Lee GJ,Chae SJ,Kang SW,Yin CS,Lee SH,Choi SK,Park HK

更新日期：2010-05-01 00:00:00

abstract：:A multi-frequency electrical impedance tomography system for cardiopulmonary monitoring has been designed with specialized digital signal processors developed primarily for the telecommunications sector. The system consists of two modules: a scan-head and a base-station. The scan-head, located close to the patient's t...

journal_title：Physiological measurement

authors： Robitaille N,Guardo R,Maurice I,Hartinger AE,Gagnon H

更新日期：2009-06-01 00:00:00

abstract：:The increasing use of EIT in clinical research on severely ill lung patients requires a clarification of the influence of pathologic impedance distributions on the validity of the resulting tomograms. Significant accumulation of low-conducting air (e.g. pneumothorax or emphysema) or well-conducting liquid (e.g. haemat...

journal_title：Physiological measurement

authors： Hahn G,Just A,Dudykevych T,Frerichs I,Hinz J,Quintel M,Hellige G

更新日期：2006-05-01 00:00:00

abstract：:The heart rate responds dynamically to various intrinsic and environmental stimuli. The autonomic nervous system is said to play a major role in this response. Multifractal analysis offers a novel method to assess the response of cardiac interbeat intervals. Twenty-four hour ECG recordings of RR interbeat intervals (o...

journal_title：Physiological measurement

authors： Makowiec D,Rynkiewicz A,Wdowczyk-Szulc J,Zarczyńska-Buchowiecka M,Gałaska R,Kryszewski S

更新日期：2011-10-01 00:00:00

abstract：:When used in large, national surveillance programmes, objective measurement tools provide prevalence estimates of low physical activity guideline compliance and high amounts of sedentary time. There are undoubtedly a plethora of reasons for this but one possible contributing factor is the current lack of behavioural c...

journal_title：Physiological measurement

authors： Loveday A,Sherar LB,Sanders JP,Sanderson PW,Esliger DW

更新日期：2016-10-01 00:00:00

abstract：:The postural stability of 30 normal subjects in the age range 15 to 64 years was measured on five separate occasions, using the sway magnetometry technique, to determine the day-to-day repeatability of this measurement technique. On each occasion the pathlength and area enclosed by movement of the hips in a horizontal...

journal_title：Physiological measurement

authors： Elliott C,Murray A

更新日期：1998-05-01 00:00:00

abstract：:Measurement of the velocity of propagation and attenuation of ultrasound (200 kHz) is believed to be a useful non-invasive technique for assessing the mechanical properties of bone. A new method for the determination of ultrasound velocity and attenuation of longitudinal waves in cortical bone was used in vivo and in ...

journal_title：Physiological measurement

authors： Saulgozis J,Pontaga I,Lowet G,Van der Perre G

更新日期：1996-08-01 00:00:00

abstract：:In this paper we present the T-SCAN technology and its use as a diagnostic tool for breast cancer detection. We show, using theoretical models with simplified geometries, that displaying planar two-dimensional maps of the currents detected at the breast's surface relate to the electric field distribution within the br...

journal_title：Physiological measurement

authors： Assenheimer M,Laver-Moskovitz O,Malonek D,Manor D,Nahaliel U,Nitzan R,Saad A

更新日期：2001-02-01 00:00:00

abstract：:Arterial pCO2 is known to influence cerebral autoregulation but its effect on the dynamic relationship between mean arterial blood pressure (ABP) and mean cerebral blood flow velocity (CBFV), obtained from spontaneous fluctuations in ABP, has not been established. In 16 normal subjects, ABP was measured non-invasively...

journal_title：Physiological measurement

authors： Panerai RB,Deverson ST,Mahony P,Hayes P,Evans DH

更新日期：1999-08-01 00:00:00

abstract：:This study compared sitting time measured by a questionnaire (International Physical Activity Questionnaire; IPAQ) with concurrently measured objective sitting time from an accelerometer-based measure of thigh inclination (activPAL).Adults (n = 69), wore an activPAL for a week, and then completed the long-form 7 d rec...

journal_title：Physiological measurement

authors： Chastin SF,Culhane B,Dall PM

更新日期：2014-11-01 00:00:00

abstract：:The back-projected independent components (BICs) of single-trial, auditory P300 and contingent negative variation (CNV) evoked potentials (EPs) were derived using independent component analysis (ICA) and cluster analysis. The method was tested in simulation including a study of the electric dipole equivalents of the s...

journal_title：Physiological measurement

authors： Jervis B,Belal S,Camilleri K,Cassar T,Bigan C,Linden DE,Michalopoulos K,Zervakis M,Besleaga M,Fabri S,Muscat J

更新日期：2007-08-01 00:00:00

abstract：:Electrical impedance tomography (EIT) could be used as a portable non-invasive means to image the development of ischaemic stroke or haemorrhage. The purpose of this study was to examine if this was possible using time difference imaging, in the anesthetised rat using 40 spring-loaded scalp electrodes with applied con...

journal_title：Physiological measurement

authors： Dowrick T,Blochet C,Holder D

更新日期：2016-06-01 00:00:00

abstract：:If electrical impedance tomography is to be used as a clinical tool, the image reconstruction algorithms must yield accurate images of impedance changes. One of the keys to producing an accurate reconstructed image is the inclusion of prior information regarding the physical geometry of the object. To achieve this, ma...

journal_title：Physiological measurement

authors： Bayford RH,Gibson A,Tizzard A,Tidswell T,Holder DS

更新日期：2001-02-01 00:00:00

abstract：:This observational study investigated digital auscultation for the purpose of assessing the clinical feasibility of monitoring vascular sounds in pregnancy. The study was performed at the Regional Hospital Viborg, Denmark, and included 29 pregnant women, 10 non-pregnant women and 10 male participants. Digital ausculta...

journal_title：Physiological measurement

authors： Riknagel D,Dinesen B,Zimmermann H,Farlie R,Schmidt S,Toft E,Struijk JJ

更新日期：2016-07-01 00:00:00

abstract：:The standard electrocardiogram (ECG) is the most common non-invasive way to study atrial fibrillation (AF). In this respect, previous works have shown that the surface lead V(1) reflects mainly the dominant atrial frequency (DAF) of the right atrium (RA), which has been widely used to study AF. In a similar way, AF or...

journal_title：Physiological measurement

authors： Alcaraz R,Hornero F,Rieta JJ

更新日期：2011-01-01 00:00:00

abstract：:Despite significant advances in adult clinical electrocardiography (ECG) signal processing techniques and the power of digital processors, the analysis of non-invasive foetal ECG (NI-FECG) is still in its infancy. The Physionet/Computing in Cardiology Challenge 2013 addresses some of these limitations by making a set ...

journal_title：Physiological measurement

authors： Behar J,Oster J,Clifford GD

更新日期：2014-08-01 00:00:00

abstract：:The effect of composition on the dielectric properties of hydrogels for biomedical applications is experimentally investigated. The hydrogels, containing hydroxyethylcellulose (HEC), are characterized by means of the impedance spectroscopy technique. The real and imaginary parts of the electrical impedance of the hydr...

journal_title：Physiological measurement

authors： Alexe-Ionescu AL,Barbero G,Freire FC,Merletti R

更新日期：2010-10-01 00:00:00

abstract：:Although cardiac arrhythmias have been studied extensively, little is known about arrhythmic phenomena in the gastrointestinal (GI) system. In this study, we demonstrate for the first time that the onset of GI arrhythmias is associated with statistically significant fluctuations in the information dimension of the ass...

journal_title：Physiological measurement

authors： Irimia A,Wikswo JP Jr

更新日期：2008-05-01 00:00:00

abstract：:The most common method of clinical measurement of arterial blood pressure is by means of the cuff sphygmomanometer. This instrument has provided fundamental quantitative information on arterial pressure in individual subjects and in populations and facilitated estimation of cardiovascular risk related to levels of blo...

journal_title：Physiological measurement

authors： Avolio AP,Butlin M,Walsh A

更新日期：2010-01-01 00:00:00

abstract：OBJECTIVE:Using raw, sub-second-level accelerometry data, we propose and validate a method for identifying and characterizing walking in the free-living environment. We focus on sustained harmonic walking (SHW), which we define as walking for at least 10 s with low variability of step frequency. APPROACH:We utilize th...

journal_title：Physiological measurement

authors： Urbanek JK,Zipunnikov V,Harris T,Fadel W,Glynn N,Koster A,Caserotti P,Crainiceanu C,Harezlak J

更新日期：2018-02-28 00:00:00

abstract：:The point spread function (PSF) is the most widely used tool for quantifying the spatial resolution of imaging systems. However, prerequisites for the proper use of this tool are linearity and space invariance. Because EIT is non-linear it is only possible to compare different reconstruction algorithms using a standar...

journal_title：Physiological measurement

authors： Ider YZ,Eyüboğlu BM,Kuzuoğlu M,Leblebïcïoğlu K,Baysal U,Cağlar BK,Bïrgül O

更新日期：1995-08-01 00:00:00

abstract：:We present an adaptive algorithm for solving the inverse problem in electrical impedance tomography. To strike a balance between the accuracy of the reconstructed images and the computational efficiency of the forward and inverse solvers, we propose to combine an adaptive mesh refinement technique with the adaptive Ka...

journal_title：Physiological measurement

authors： Li T,Isaacson D,Newell JC,Saulnier GJ

更新日期：2014-06-01 00:00:00

abstract：:A gamma fit facilitates smoothing and extrapolation of distorted tracer-dilution curves in blood flow studies. Theoretically based empirical estimators were developed as simple alternatives to direct regression approaches from simulated gamma distributions with a wide range of shape asymmetry. Key curve features of pe...

journal_title：Physiological measurement

authors： Lopatatzidis A,Millard RK

更新日期：2001-11-01 00:00:00