Patient-specific simulations and measurements of the magneto-hemodynamic effect in human primary vessels.


:This paper investigates the main characteristics of the magneto-hemodynamic (MHD) response for application as a biomarker of vascular blood flow. The induced surface potential changes of a volunteer exposed to a 3 T static B0 field of a magnetic resonance imaging (MRI) magnet were measured over time at multiple locations by an electrocardiogram device and compared to simulation results. The flow simulations were based on boundary conditions derived from MRI flow measurements restricted to the aorta and vena cava. A dedicated and validated low-frequency electromagnetic solver was applied to determine the induced temporal surface potential change from the obtained 4D flow distribution using a detailed whole-body model of the volunteer. The simulated MHD signal agreed with major characteristics of the measured signal (temporal location of main peak, magnitude, variation across chest and along torso) except in the vicinity of the heart. The MHD signal is mostly influenced by the aorta; however, more vessels and better boundary conditions are needed to analyze the finer details of the response. The results show that the MHD signal is strongly position dependent with highly variable but reproducibly measurable distinguished characteristics. Additional investigations are necessary before determining whether the MHD effect is a reliable reference for location-specific information on blood flow.


Physiol Meas


Kyriakou A,Neufeld E,Szczerba D,Kainz W,Luechinger R,Kozerke S,McGregor R,Kuster N




Has Abstract


2012-02-01 00:00:00












  • Neural network analysis of oxygenation signals in infants during sleep.

    abstract::The use of artificial neural networks (ANNs) to interpret sleep monitoring signals is described. Recordings from ten infants with apparent life threatening episodes were assigned into training feedforward R-PROP networks. In order to separate good signal from artefact, 60 second time frames of SaO2 and TcPO2 signals w...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Taktak AF,Simpson S,Patel S,Meyer G

    更新日期:2000-08-01 00:00:00

  • An efficient unsupervised fetal QRS complex detection from abdominal maternal ECG.

    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

    pub_type: 杂志文章


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

    更新日期:2014-08-01 00:00:00

  • Restoration of the electrocardiogram during mechanical cardiopulmonary resuscitation.

    abstract:OBJECTIVE:An artefact-free electrocardiogram (ECG) is essential during cardiac arrest to decide therapy such as defibrillation. Mechanical cardiopulmonary resuscitation (CPR) devices cause movement artefacts that alter the ECG. This study analyzes the effectiveness of mechanical CPR artefact suppression filters to rest...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Isasi I,Irusta U,Aramendi E,Idris AH,Sörnmo L

    更新日期:2020-11-06 00:00:00

  • Influence of tidal volume and positive end-expiratory pressure on ventilation distribution and oxygenation during one-lung ventilation.

    abstract:OBJECTIVE:The aim of the study was to explore the feasibility of titrating tidal volume (V T) and positive end-expiratory pressure (PEEP) during one-lung ventilation (OLV) based on ventilation distribution and oxygenation. APPROACH:Twenty-four consecutive patients requiring intubation with a double-lumen tube and subs...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Zhao Z,Wang W,Zhang Z,Xu M,Frerichs I,Wu J,Moeller K

    更新日期:2018-03-29 00:00:00

  • Monitoring of body fluid redistribution using segmental bioimpedance during rotation on a short-radius centrifuge.

    abstract:OBJECTIVE:The creation of artificial gravity on board a space station is one of the promising methods for preventing health problems during space missions; a short-radius centrifuge (SRC) is the model of such a method on Earth. Our goal was to evaluate the sensitivity of bioimpedance polysegmental measurements for moni...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Takhtobina YV,Shchelykalina SP,Smirnov YI,Smirnov AV,Koloteva MI,Vassilieva GY,Nikolaev DV

    更新日期:2020-05-07 00:00:00

  • Quantifying agitation in sedated ICU patients using heart rate and blood pressure.

    abstract::Agitation is a significant problem in the intensive care unit (ICU), affecting 71% of sedated adult patients during 58% of ICU patient-days (Fraser and Riker 2001 NY Health-Syst. Pharm. 20 17-24). Subjective scale-based assessment methods are currently used to assess the level of patient agitation, but are limited in ...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Chase JG,Starfinger C,Lam Z,Agogue F,Shaw GM

    更新日期:2004-08-01 00:00:00

  • A shape-based quality evaluation and reconstruction method for electrical impedance tomography.

    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

    pub_type: 杂志文章


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

    更新日期:2015-06-01 00:00:00

  • The origin of skin-stretch-caused motion artifacts under electrodes.

    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

    pub_type: 杂志文章


    authors: de Talhouet H,Webster JG

    更新日期:1996-05-01 00:00:00

  • Empirical mode decomposition analysis of HRV data from patients undergoing local anaesthesia (brachial plexus block).

    abstract::Spectral analysis of heart rate variability (HRV) is used for the assessment of cardiovascular autonomic control. In this study, a data-driven adaptive technique called empirical mode decomposition (EMD) and the associated Hilbert spectrum has been used to evaluate the effect of local anaesthesia on HRV parameters in ...

    journal_title:Physiological measurement

    pub_type: 临床试验,杂志文章


    authors: Shafqat K,Pal SK,Kumari S,Kyriacou PA

    更新日期:2011-04-01 00:00:00

  • Cardiorespiratory coupling in young healthy subjects.

    abstract:OBJECTIVE:To quantify the presence of cardiorespiratory interaction in a group of 41 healthy subjects performing a subset of the Ewing test battery. APPROACH:We measure the empirical distribution of the cardiorespiratory coupling time (RI), defined as the time from inspiration onset to R peaks in the ECG. The study pr...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Sobiech T,Buchner T,Krzesiński P,Gielerak G

    更新日期:2017-11-30 00:00:00

  • The possible role of the vagal nervous system in the recovery of the blood pressure control after cardiac arrest: a porcine model study.

    abstract::Previous studies have proved that the baroreceptor reflex (baroreflex) control of heart rate can be used for stratification of post-infarction population and, in general, cardiovascular disease populations. Many methods have been proposed to estimate the so-called baroreflex sensitivity (BRS) expressed as ms mmhg-1. M...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Lavanga M,Baselli G,Fumagalli F,Ristagno G,Ferrario M

    更新日期:2017-01-01 00:00:00

  • New porcine test-model reveals remarkable differences between algorithms for spectrophotometrical haemoglobin saturation measurements with VLS.

    abstract:UNLABELLED:The study created an 'ex vivo' model to test different algorithms for measurements of mucosal haemoglobin saturation with visible light spectrophotometry (VLS). The model allowed comparison between algorithms, but it also allowed comparison with co-oximetry using a 'gold standard' method. This has not been d...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Gade J,Greisen G

    更新日期:2016-09-01 00:00:00

  • Photoplethysmography detection of lower limb peripheral arterial occlusive disease: a comparison of pulse timing, amplitude and shape characteristics.

    abstract::The assessment and diagnosis of lower limb peripheral arterial occlusive disease (PAOD) is important since it can lead progressively to disabling claudication, ischaemic rest pain and gangrene. Historically, the first assessment has been palpation of the peripheral pulse since it can become damped, delayed and diminis...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Allen J,Oates CP,Lees TA,Murray A

    更新日期:2005-10-01 00:00:00

  • Electroencephalogram classification in motor-imagery brain-computer interface applications based on double-constraint nonnegative matrix factorization.

    abstract:OBJECTIVE:Brain-computer interfaces (BCIs) are aimed at providing a new way of communication between the human brain and external devices. One of the major tasks associated with the BCI system is to improve classification performance of the motor imagery (MI) signal. Electroencephalogram (EEG) signals are widely used f...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Su J,Yang Z,Yan W,Sun W

    更新日期:2020-08-11 00:00:00

  • Real-time arrhythmia detection with supplementary ECG quality and pulse wave monitoring for the reduction of false alarms in ICUs.

    abstract::False intensive care unit (ICU) alarms induce stress in both patients and clinical staff and decrease the quality of care, thus significantly increasing both the hospital recovery time and rehospitalization rates. In the PhysioNet/CinC Challenge 2015 for reducing false arrhythmia alarms in ICU bedside monitor data, th...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Krasteva V,Jekova I,Leber R,Schmid R,Abächerli R

    更新日期:2016-08-01 00:00:00

  • Predicting clinical ischaemia during awake carotid endarterectomy: use of the SJVO2 probe as a guide to selective shunting.

    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

    pub_type: 临床试验,杂志文章


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

    更新日期:2003-05-01 00:00:00

  • Decomposition method of an electrical bio-impedance signal into cardiac and respiratory components.

    abstract::The paper presents a method for adaptive decomposition of an electrical bio-impedance (BI) signal into two components: cardiac and respiratory. The decomposition of a BI signal is not a trivial process because of the non-stationarity of the signal components and overlapping of their harmonic spectra. An application sp...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Krivoshei A,Kukk V,Min M

    更新日期:2008-06-01 00:00:00

  • Comparison of EPR oximetry and Eppendorf polarographic electrode assessments of rat brain PtO2.

    abstract::EPR oximetry is a promising, relatively non-invasive method for monitoring the partial pressure of oxygen in tissue (PtO2) that has proved useful in following changes under various physiologic and pathophysiologic conditions. Optimal utilization of the method will be facilitated by systematic comparisons with other av...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: O'Hara JA,Khan N,Hou H,Wilmo CM,Demidenko E,Dunn JF,Swartz HM

    更新日期:2004-12-01 00:00:00

  • An electrical impedance tomography system for gynecological application GIT with a tiny electrode array.

    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

    pub_type: 杂志文章


    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

  • Assessment of hepatic fatty infiltration using dual-energy computed tomography: a phantom study.

    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

    pub_type: 杂志文章


    authors: Li JH,Tsai CY,Huang HM

    更新日期:2014-04-01 00:00:00

  • Hidden Markov model-based activity recognition for toddlers.

    abstract:OBJECTIVE:Physical activity has been shown to impact future health outcomes in adults, but little is known about the long-term impact of physical activity in toddlers. Accurately measuring the specific types and amounts of physical activity in toddlers will help us to understand, predict, and better affect their future...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Albert MV,Sugianto A,Nickele K,Zavos P,Sindu P,Ali M,Kwon S

    更新日期:2020-03-06 00:00:00

  • Esophageal temperature monitoring during radiofrequency catheter ablation: experimental study based on an agar phantom model.

    abstract::Although previous studies have established the feasibility of monitoring esophageal temperature during radiofrequency cardiac ablation using an esophageal temperature probe (ETP), some questions remain regarding its efficacy. The aims of this study were to study the effect of the location of the ETP on the temperature...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Rodríguez I,Lequerica JL,Berjano EJ,Herrero M,Hornero F

    更新日期:2007-05-01 00:00:00

  • Generalizability of extracellular-to-intracellular fluid ratio using bio-impedance spectroscopy.

    abstract::Generalizability theory was used to investigate the score consistency of observed extracellular fluid/intracellular fluid (ECF/ICF) ratio measurements for both the global and leg-segmental bio-impedance spectroscopy methods. The test instrument used was a Xitron Hydra ECF/ICF Bio-Impedance Analyzer System, model 4200 ...

    journal_title:Physiological measurement

    pub_type: 杂志文章,随机对照试验


    authors: Turner AA,Lozano-Nieto A,Bouffard M

    更新日期:2006-04-01 00:00:00

  • Triple-frequency method for measuring blood impedance.

    abstract::A method was developed for simultaneously measuring plasma resistance, cell interior resistance and cell membrane capacitance of blood. A three-element circuit model for simulating the impedance of blood was evaluated by comparing measured and calculated impedance frequency curves and was found feasible. The values of...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Zhao TX,Jacobson B,Ribbe T

    更新日期:1993-05-01 00:00:00

  • Combining and benchmarking methods of foetal ECG extraction without maternal or scalp electrode data.

    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

    pub_type: 杂志文章


    authors: Behar J,Oster J,Clifford GD

    更新日期:2014-08-01 00:00:00

  • Use of the discriminant Fourier-derived cepstrum with feature-level post-processing for surface electromyographic signal classification.

    abstract::Myoelectrical pattern classification is a crucial part in multi-functional prosthesis control. This paper investigates a discriminant Fourier-derived cepstrum (DFC) and feature-level post-processing (FLPP) to discriminate hand and wrist motions using the surface electromyographic signal. The Fourier-derived cepstrum t...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Chen X,Zhu X,Zhang D

    更新日期:2009-12-01 00:00:00

  • Age-related changes in pulse risetime measured by multi-site photoplethysmography.

    abstract:OBJECTIVE:It is accepted that changes in the peripheral pulse waveform characteristics occur with ageing. Pulse risetime is one important feature which has clinical value. However, it is unclear how it varies across the full age spectrum from child to senior and for different peripheral measurement sites. The objective...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Allen J,O'Sullivan J,Stansby G,Murray A

    更新日期:2020-08-11 00:00:00

  • The assessment of acute load and contractility changes by left ventricular pressure measurements.

    abstract::The aim of this study was to establish whether analysis of the left ventricular pressure waveform provides indicative information about cardiac load and contractility and to develop an algorithm for computer-based assessment of changes in these variables. In eight healthy standard breed anaesthetized open-chest pigs, ...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Söderqvist E,Hultman J,Källner G,Nowak J,Brodin LA

    更新日期:2006-12-01 00:00:00

  • Cardio-respiratory signal extraction from video camera data for continuous non-contact vital sign monitoring using deep learning.

    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

    pub_type: 杂志文章


    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

  • The physiological impact of the nonlinearity of arterial elasticity in the ambulatory arterial stiffness index.

    abstract::The ambulatory arterial stiffness index (AASI) is claimed to be a new estimator for arterial rigidity. It was recently defined as one minus the slope of the linear regression of systolic to diastolic ambulatory pressure during 24 h. Although several reports testify its clinical relevance, the explanation of how this n...

    journal_title:Physiological measurement

    pub_type: 杂志文章


    authors: Craiem D,Graf S,Salvucci F,Chironi G,Megnien JL,Simon A,Armentano RL

    更新日期:2010-07-01 00:00:00