Video and audio processing in paediatrics: a review.

abstract：:This paper introduces a new clinical distortion index able to measure the decrease in diagnostic content in compressed echocardiograms. It is calculated using cardiologists' answers to a clinical testbed composed of two types of tests: one blind and the other semi-blind. This index may be used to compare clinical perf...

journal_title：Physiological measurement

authors： Alesanco A,Hernández C,Portolés A,Ramos L,Aured C,García M,Serrano P,García J

更新日期：2009-05-01 00:00:00

abstract：OBJECTIVE:This paper aims to report on the accuracy of estimating sleep stages using a wrist-worn device that measures movement using a 3D accelerometer and an optical pulse photoplethysmograph (PPG). APPROACH:Overnight recordings were obtained from 60 adult participants wearing these devices on their left and right w...

journal_title：Physiological measurement

authors： Beattie Z,Oyang Y,Statan A,Ghoreyshi A,Pantelopoulos A,Russell A,Heneghan C

更新日期：2017-10-31 00:00:00

abstract：OBJECTIVE:Accurate bladder size estimation is an important clinical parameter that assists physicians, enabling them to provide better treatment for patients who are suffering from urinary incontinence. Electrical impedance tomography (EIT) is a non-invasive medical imaging method that estimates organ boundaries assumi...

journal_title：Physiological measurement

authors： Konki SK,Khambampati AK,Sharma SK,Kim KY

更新日期：2020-12-18 00:00:00

abstract：:The ability to predict if an atrial fibrillation (AF) episode terminates spontaneously or not through non-invasive techniques is a challenging problem of great clinical interest. This fact could avoid useless therapeutic interventions and minimize the risks for the patient. The present work introduces a robust AF pred...

journal_title：Physiological measurement

authors： Alcaraz R,Rieta JJ

更新日期：2008-01-01 00:00:00

abstract：:Virtual shunt describes the overall loss of O2 content between the alveolar gas and arterial blood. Clinicians indirectly estimate the magnitude of the virtual shunt by monitoring peripheral blood oxygen saturation (SpO2) using non-invasive pulse oximetry. An inherent limitation of this method is the variable precisio...

journal_title：Physiological measurement

authors： Karlen W,Petersen CL,Dumont GA,Ansermino JM

更新日期：2015-05-01 00:00:00

abstract：:This paper discusses some important issues for the design of electrical impedance measurement systems intended for body fluid shift monitoring, in particular during dialysis treatments. We have studied two common signal generation systems: digital synthesis and carrier recovery. We have found that in prolonged measure...

journal_title：Physiological measurement

authors： Lozano A,Rosell J,Pallás-Areny R

更新日期：1995-11-01 00:00:00

abstract：:Electrical impedance tomography (EIT) has the potential to become a new tool for bedside monitoring of regional lung ventilation. The aim of our study was to assess the reproducibility of regional lung ventilation distribution determined by EIT during mechanical ventilation under identical ventilator settings. The exp...

journal_title：Physiological measurement

authors： Frerichs I,Schmitz G,Pulletz S,Schädler D,Zick G,Scholz J,Weiler N

更新日期：2007-07-01 00:00:00

abstract：:Neuromagnetic recordings were used to check if electrical stimulation of the auditory nerve in cochlear-implant patients activates cortical auditory areas in a similar manner as acoustic stimulation in normal hearing subjects or whether the excitation processes are different. The waveform of the evoked magnetic field ...

journal_title：Physiological measurement

authors： Pelizzone M

更新日期：1993-11-01 00:00:00

abstract：:Part I of this series showed that the five-element circuit model accurately mimics impedances measured using multi-frequency electrical impedance myography (MFEIM), focusing on changes brought on by disease. This paper addresses two requirements which must be met if the method is to qualify for clinical use. First, th...

journal_title：Physiological measurement

authors： Shiffman CA,Rutkove SB

更新日期：2013-02-01 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：: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：:Obesity is a major health issue in both developed and developing countries. The balance between energy intake and exercise is important, and measurements of both energy intake and energy expenditure are required. Many studies have attempted to monitor energy intake via wearable technology, but no standard methods have...

journal_title：Physiological measurement

authors： Tamura T

更新日期：2019-09-03 00:00:00

abstract：OBJECTIVE:Manganese (Mn) is a neurotoxin. However, the impact of elevated, chronic Mn exposure is not well understood, partially due to the lack of a cumulative exposure biomarker. To address this gap, our group developed a compact in vivo neutron activation analysis (IVNAA) system to quantify Mn concentration in bone ...

journal_title：Physiological measurement

authors： Liu Y,Rolle-McFarland D,Mostafaei F,Zhou Y,Li Y,Zheng W,Wells E,Nie LH

更新日期：2018-03-23 00:00:00

abstract：:We used the finite element (FE) method to estimate the spatial sensitivity of a needle electrode for bioimpedance measurements. This current conducting needle with an insulated shaft was inserted in a saline solution and the current was measured at the neutral electrode. Model resistance and reactance were calculated ...

journal_title：Physiological measurement

authors： Høyum P,Kalvøy H,Martinsen ØG,Grimnes S

更新日期：2010-10-01 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：:The paper describes the development of an electrical impedance tomography (EIT) system for gynecologic research. The GIT (gynecological impedance tomography) system has 48 electrodes and is embedded on a small space (30 mm diameter and 20 mm height) inside of the vaginal probe. The system provides real-time (one shot ...

journal_title：Physiological measurement

authors： V A C,Y V G,A V K,S A S,T S T

更新日期：2012-05-01 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：:Cardiac output (CO) monitoring is not only essential for critically ill patients in the hospital, but also for patients at home and those undergoing cardiopulmonary exercise testing. However, CO is difficult to monitor during daily activities and exercise. In this paper, we aim at developing a novel CO estimation meth...

journal_title：Physiological measurement

authors： Wang L,Poon CC,Zhang YT

更新日期：2010-05-01 00:00:00

abstract：:In electrical impedance tomography (EIT) two-dimensional models continue to be applied despite their known inability to provide correct reconstruction. In this paper, a reconstruction algorithm that assumes a translationally invariant conductivity distribution is described. A more precise forward solver is obtained by...

journal_title：Physiological measurement

authors： Jerbi K,Lionheart WR,Vauhkonen PJ,Vauhkonen M

更新日期：2000-02-01 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：:Sedentary behaviour (SB) is associated with a number of adverse health outcomes. Studies that have used ActiGraph monitors to define sedentary time tend to use a threshold of  <100 counts per minute (cpm) for classifying SB; however, this cut-point was not empirically derived for adults. It is not known whether ActiGr...

journal_title：Physiological measurement

authors： Clarke-Cornwell AM,Farragher TM,Cook PA,Granat MH

更新日期：2016-10-01 00:00:00

abstract：:The purpose of this study was to examine the validity and reliability of estimated parameters of the work-time relationship during cross-country ski ergometry using the traditional multi-trial critical power (CP) test and a 3 min 'all-out' test (3MT). Fourteen recreationally active male participants (mean ± SD; age: 2...

journal_title：Physiological measurement

authors： Fukuda DH,Hetrick RP,Kendall KL,Smith-Ryan AE,Jackson ME,Stout JR

更新日期：2014-01-01 00:00:00

abstract：:Current methods for analysing foetal heart rate (FHR) patterns have yet to meet their full potential in the recognition of hypoxia in the foetus. Following the recent suggestion that fractal analysis can be applied to FHR recordings, the current paper describes a method for distinguishing two simultaneous fractal dime...

journal_title：Physiological measurement

authors： Gough NA

更新日期：1993-08-01 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：: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：:This paper presents the design, construction and testing of a device to measure pressure-volume loops in the left ventricle of conscious, ambulatory rats. Pressure is measured with a standard sensor, but volume is derived from data collected from a tetrapolar electrode catheter using a novel admittance technique. Ther...

journal_title：Physiological measurement

authors： Raghavan K,Feldman MD,Porterfield JE,Larson ER,Jenkins JT,Escobedo D,Pearce JA,Valvano JW

更新日期：2011-06-01 00:00:00

abstract：:Cycling on an ergometer is one effective means of measuring cardiovascular function while applying stress on the heart. Bathing in a hot water bath applies a low stress to the heart. The electrocardiograms of a healthy adult male (aged 35 at the start of study) were recorded while taking a hot water bath with no elect...

journal_title：Physiological measurement

authors： Ishijima M,Togawa T

更新日期：1999-11-01 00:00:00

abstract：:High-frequency percussive ventilation (HFPV) may be defined as flow-regulated time-cycled ventilation that creates controlled pressure and delivers a series of high-frequency subtidal volumes in combination with low-frequency breathing cycles. In recent years, the usefulness of HFPV has been clinically assessed as an ...

journal_title：Physiological measurement

authors： Riscica F,Lucangelo U,Ferluga M,Accardo A

更新日期：2011-06-01 00:00:00

abstract：:Focused impedance measurements (FIM) are used in several fields, and address the problem of measuring the volume impedance of an object within a volume conductor. Several electrode configurations are possible, and these have different properties. Sensitivity fields of four configurations have been investigated. We pre...

journal_title：Physiological measurement

authors： Pettersen FJ,Ferdous H,Kalvøy H,Martinsen ØG,Høgetveit JO

更新日期：2014-06-01 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