Dynamic time warping and machine learning for signal quality assessment of pulsatile signals.

abstract：:Pulmonary blood volume increase during systole was measured in patients by analysing chest images obtained during ECG gated radionuclide angiography examination. The difference in the total radiation counts between systole and diastole in regions of interest, which included the lungs and the left ventricle, was measur...

journal_title：Physiological measurement

authors： Nitzan M,Mahler Y,Schechter D,Yaffe S,Bocher M,Chisin R

更新日期：1994-11-01 00:00:00

abstract：:The outside of the skin of the forearm is typically 15 mV more negative than the inside. Stretching the skin causes a reduction in the magnitude of this skin potential V, which we observe as a motion artifact delta V. We seek to determine the origin of this motion artifact by successively stripping 12 layers of the sk...

journal_title：Physiological measurement

authors： de Talhouet H,Webster JG

更新日期：1996-05-01 00:00:00

abstract：OBJECTIVE:Atrial fibrillation (AF) causes marked risk for patients, while silent fibrillation may remain unnoticed if not suspected and screened. Development of comfortable yet accurate beat-to-beat heart rate (HR) monitoring with good AF detection sensitivity would facilitate screening and improve treatment. The purpo...

journal_title：Physiological measurement

authors： Harju J,Tarniceriu A,Parak J,Vehkaoja A,Yli-Hankala A,Korhonen I

更新日期：2018-06-27 00:00:00

abstract：OBJECTIVE:This paper aims to present how physiological signals can be processed based on wavelet decomposition to calculate multiple physiological parameters in real-time on an embedded platform. APPROACH:An ECG and PPG are decomposed to the appropriate scale based on a quadratic spline wavelet base in order to obtain...

journal_title：Physiological measurement

authors： Tang M,Xia P,He Z,Zhao Z,Chen X,Yang T,Zhang Z,Zhan Q,Li X,Fang Z

更新日期：2020-03-06 00:00:00

abstract：:A coordinated study of the dispersal of water between the various body compartments (stomach and gut, blood stream and tissue) and the similar dispersal kinetics of ethanol and its metabolism has been carried out involving two healthy volunteers using flowing afterglow mass spectrometry, FA-MS, and selected ion flow t...

journal_title：Physiological measurement

authors： Spanel P,Wang T,Smith D

更新日期：2005-08-01 00:00:00

abstract：:Stroke is a major cause of disability within the western world. About 20% of strokes are a consequence of atheromatous narrowing of the origin of the internal carotid artery. Carotid endarterectomy has been shown to be an effective treatment for those with symptomatic and severe stenosis, provided the risk of death an...

journal_title：Physiological measurement

authors： Crossman J,Banister K,Bythell V,Bullock R,Chambers I,Mendelow AD

更新日期：2003-05-01 00:00:00

abstract：:A method is described that accounts for multichannel brain field data (EEG) epochs, after transformation into the frequency domain, by a single oscillating dipole source in terms of phase angles. The method produces a potential distribution for each frequency point ('FFT dipole approximation'). These maps can be subje...

journal_title：Physiological measurement

authors： Michel CM,Henggeler B,Brandeis D,Lehmann D

更新日期：1993-11-01 00:00:00

abstract：:Electrical impedance tomography (EIT) is very sensitive to deformations of the medium boundary shape. For lung imaging, breathing and changes in posture move the electrodes and change the chest shape, resulting in image artefacts. Several approaches have been proposed to improve the reconstructed images; most methods ...

journal_title：Physiological measurement

authors： Gómez-Laberge C,Adler A

更新日期：2008-06-01 00:00:00

abstract：:In this study, we designed and tested a new algorithm, which we call the 'restricted parabola', to identify the optimum atrioventricular (AV) delay in patients with biventricular pacemakers. This algorithm automatically restricts the hemodynamic data used for curve fitting to the parabolic zone in order to avoid inadv...

journal_title：Physiological measurement

authors： Dehbi HM,Jones S,Sohaib SM,Finegold JA,Siggers JH,Stegemann B,Whinnett ZI,Francis DP

更新日期：2015-09-01 00:00:00

abstract：:Non-invasive fetal heart rate is of great relevance in clinical practice to monitor fetal health state during pregnancy. To date, however, despite significant advances in the field of electrocardiography, the analysis of abdominal fetal ECG is considered a challenging problem for biomedical and signal processing commu...

journal_title：Physiological measurement

authors： Varanini M,Tartarisco G,Billeci L,Macerata A,Pioggia G,Balocchi R

更新日期：2014-08-01 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：:Electrical impedance tomography (EIT) is a recent imaging technique based on electrical impedance, offering the possibility of measuring pulmonary perfusion. In the present study the influence of several pulmonary haemodynamical parameters on the EIT signal were investigated. First, the influence on the systolic wave ...

journal_title：Physiological measurement

authors： Vonk Noordegraaf A,Kunst PW,Janse A,Marcus JT,Postmus PE,Faes TJ,de Vries PM

更新日期：1998-05-01 00:00:00

abstract：:Although people spend a third of their day engaged in sedentary activities, research on heart activity during sitting is almost nonexistent because of the discomfort experienced when electrocardiogram (ECG) measurement electrodes are attached to the body. Accordingly, in this study, a system was developed to monitor h...

journal_title：Physiological measurement

authors： Lim E,Lee HK,Myoung HS,Lee KJ

更新日期：2015-03-01 00:00:00

abstract：:The relation between the right-side (RS) electrical impedance phase angle (PA) and segmental PA in five configurations at 50 kHz was analyzed in 23 peritoneal dialysis male patients before complete drainage of the abdominal cavity. The impedance vector (Z/H) components were standardized by the height H of the subjects...

journal_title：Physiological measurement

authors： Nescolarde L,Rosell-Ferrer J,Doñate T

更新日期：2008-09-01 00:00:00

abstract：OBJECTIVE:Metal exposures have been linked with many adverse health outcomes affecting nearly every system in the body. Exposure to metals has been tracked primarily using blood. Blood metal concentrations have drawbacks as biomarkers stemming from the metals' short biologic half-lives, shipping and storage requirement...

journal_title：Physiological measurement

authors： Specht AJ,Kponee K,Nkpaa KW,Balcom PH,Weuve J,Nie LH,Weisskopf MG

更新日期：2018-08-31 00:00:00

abstract：:Muscle stiffness is known to vary as a result of a variety of disease states, yet current clinical methods for quantifying muscle stiffness have limitations including cost and availability. We investigated the capability of shear wave elastography (SWE) to measure variations in gastrocnemius shear wave speed induced v...

journal_title：Physiological measurement

authors： Chernak LA,DeWall RJ,Lee KS,Thelen DG

更新日期：2013-06-01 00:00:00

abstract：:Linear methods of reconstruction play an important role in medical electrical impedance tomography (EIT) and there is a wide variety of algorithms based on several assumptions. With the Graz consensus reconstruction algorithm for EIT (GREIT), a novel linear reconstruction algorithm as well as a standardized framework ...

journal_title：Physiological measurement

authors： Antink CH,Pikkemaat R,Malmivuo J,Leonhardt S

更新日期：2015-06-01 00:00:00

abstract：:There are currently no objective means of quantifying chest wall vibrations during manual physiotherapy. The aims of the study were to (i) develop a method to quantify physiotherapy-applied forces and simultaneous changes in respiratory flow and pressure, (ii) assess the feasibility of using this method in ventilated ...

journal_title：Physiological measurement

authors： Gregson RK,Stocks J,Petley GW,Shannon H,Warner JO,Jagannathan R,Main E

更新日期：2007-09-01 00:00:00

abstract：:The purpose of this study was to examine the performance of dual-energy computed tomography (DECT) for the quantification of liver fat content (LFC). We prepared two phantoms: homogenized mixtures of porcine liver and fat and homogeneous mixtures of liver- and fat-equivalent solutions. Tubes containing mixtures with k...

journal_title：Physiological measurement

authors： Li JH,Tsai CY,Huang HM

更新日期：2014-04-01 00:00:00

abstract：:Non-contact vital sign monitoring enables the estimation of vital signs, such as heart rate, respiratory rate and oxygen saturation (SpO2), by measuring subtle color changes on the skin surface using a video camera. For patients in a hospital ward, the main challenges in the development of continuous and robust non-co...

journal_title：Physiological measurement

authors： Chaichulee S,Villarroel M,Jorge J,Arteta C,McCormick K,Zisserman A,Tarassenko L

更新日期：2019-12-02 00:00:00

abstract：:Electroneurograms (ENGs) from the vagus nerve (VN), the splanchnic nerve (SN) and the pancreatic nerve (PN) innervating the pancreas of a dog, were recorded with chronically implanted 33-electrode spiral cuffs (cuff) before and after the pancreas were stimulated with intravenously (i.v.) administered glucose. In the c...

journal_title：Physiological measurement

authors： Rozman J,Zorko B,Bunc M,Mikac U,Tegou E

更新日期：2002-11-01 00:00:00

abstract：:Gastro-oesophageal pH measurements are routinely carried out to quantify and determine if levels of acid reflux are responsible for symptoms. Although considered the 'gold standard', evidence suggests that pH measurements do not correlate well with the degree of oesophagitis seen during endoscopy. In this study the cu...

journal_title：Physiological measurement

authors： Haylett KR,Vales P,Lee SH,McCloy RF

更新日期：2003-11-01 00:00:00

abstract：:Impedance cardiography (ICG) has been proposed to estimate the stroke volume (SV) and cardiac output (CO) in various medical indications. The aim of this study was to explore the reliability of ICG during pregnancy with respect to SV and CO measurements. Blood pressure, heart rate and thoracic impedance were monitored...

journal_title：Physiological measurement

authors： Moertl MG,Schlembach D,Papousek I,Hinghofer-Szalkay H,Weiss EM,Lang U,Lackner HK

更新日期：2012-06-01 00:00:00

abstract：:In this study, we developed a novel technique for estimating non-constrained and cuffless blood pressure (BP) that was based on electrocardiogram (ECG) and ballistocardiogram (BCG). The BCG was non-invasively measured using a common electronic weighing scale when a subject was standing on it. The ECG was measured usin...

journal_title：Physiological measurement

authors： Shin JH,Lee KM,Park KS

更新日期：2009-07-01 00:00:00

abstract：:This study was done to introduce new parameters derived by time frequency analysis of heart rate variability data. Four simulation experiments were carried out to compare the short-time Fourier transform (STFT) analysis method to the traditional overall spectral analysis method. Sinusoidal signals were generated with ...

journal_title：Physiological measurement

authors： Elsenbruch S,Wang Z,Orr WC,Chen JD

更新日期：2000-05-01 00:00:00

abstract：:Using a primary coil that induces eddy currents in a volume conductor, and a pair of secondary coils configured to form a differential transformer, it is possible to measure the conductivity of a volume conductor by the magnetic fields of the induced eddy currents. This method is especially favourable for measuring im...

journal_title：Physiological measurement

authors： Netz J,Forner E,Haagemann S

更新日期：1993-11-01 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

abstract：:This paper describes an open loop feedback intelligent system for neonatal intensive care management. The system provides a tool enabling the user to make the final decision to accept or reject the advice given. The system collects 18 parameters from the bedside monitor and ventilator using a Medical Information Bus (...

journal_title：Physiological measurement

authors： Belal SY,Taktak AF,Nevill A,Spencer A

更新日期：2005-08-01 00:00:00

abstract：OBJECTIVE:Idiopathic pulmonary fibrosis (IPF) is a progressive and fatal disease characterized by excessive deposition of collagen and associated stiffening of lung tissue. While it is known that inflammation and dysfunction of fibroblasts are involved in disease development, it remains poorly understood how cells and ...

journal_title：Physiological measurement

authors： Wellman TJ,Mondoñedo JR,Davis GS,Bates JHT,Suki B

更新日期：2018-06-28 00:00:00

abstract：:False alarm (FA) rates as high as 86% have been reported in intensive care unit monitors. High FA rates decrease quality of care by slowing staff response times while increasing patient burdens and stresses. In this study, we proposed a rule-based and multi-channel information fusion method for accurately classifying ...

journal_title：Physiological measurement

authors： Liu C,Zhao L,Tang H,Li Q,Wei S,Li J

更新日期：2016-08-01 00:00:00