Spectral analysis of heart rate variability using the integral pulse frequency modulation model.

abstract：:The diagnosis of sleep-disordered breathing (SDB) usually relies on the analysis of complex polysomnographic measurements performed in specialized sleep centers. Automatic signal analysis is a promising approach to reduce the diagnostic effort. This paper addresses SDB and sleep assessment solely based on the analysis...

journal_title：Medical & biological engineering & computing

authors： Kesper K,Canisius S,Penzel T,Ploch T,Cassel W

更新日期：2012-02-01 00:00:00

abstract：:Disturbed cerebrospinal fluid (CSF) dynamics are part of the pathophysiology of normal pressure hydrocephalus (NPH) and can be modified and treated with shunt surgery. This study investigated the contribution of established CSF dynamic parameters to AMP(mean), a prognostic variable defined as mean amplitude of cardiac...

journal_title：Medical & biological engineering & computing

authors： Qvarlander S,Malm J,Eklund A

更新日期：2014-01-01 00:00:00

abstract：:The starting point of this paper is the analysis of the reference problem in intra-cerebral electroencephalographic (iEEG) recordings. It is well accepted that both surface and depth EEG signals are always recorded with respect to some unknown time-varying signal called reference. This article discusses different meth...

journal_title：Medical & biological engineering & computing

authors： Madhu N,Ranta R,Maillard L,Koessler L

更新日期：2012-10-01 00:00:00

abstract：:The use of piezo-resistive uni-axial accelerometer signals in gait analysis is complicated by the fact that the measured signal is composed of different types of acceleration. The aim of the study is to obtain insight into the signal from a tangential accelerometer attached to the thigh during walking. Six subjects wa...

journal_title：Medical & biological engineering & computing

authors： Bussmann JB,Damen L,Stam HJ

更新日期：2000-11-01 00:00:00

abstract：:A computer-assisted human peripheral blood leukocyte image classification method based on Siamese network is proposed. Firstly, a Siamese network with two identical convolutional neural network (CNN) sub-networks and a logistic regression for leukocyte five classification is designed, which can learn not only distingu...

journal_title：Medical & biological engineering & computing

authors： Wang Y,Cao Y

更新日期：2020-07-01 00:00:00

abstract：:Several 3D reconstruction techniques deriving from stereoradiographic DLT have been presented during the last 15 years, but these techniques have usually been limited in accuracy because of the small number of corresponding anatomical landmarks identified on both radiographs. A new technique has recently been proposed...

journal_title：Medical & biological engineering & computing

authors： Mitulescu A,Semaan I,De Guise JA,Leborgne P,Adamsbaum C,Skalli W

更新日期：2001-03-01 00:00:00

abstract：:In this study, the shape and the configuration of smooth muscle cells (SMCs) within the arterial wall are altered to investigate their influence on molecular transport across the media layer of the thoracic aorta wall. In a 2D geometry of the media layer containing SMCs, the finite-element method has been employed to ...

journal_title：Medical & biological engineering & computing

authors： Dabagh M,Jalali P,Sarkomaa P

更新日期：2007-11-01 00:00:00

abstract：:Breast cancer is the most common cancer among women globally, and the number of young women diagnosed with this disease is gradually increasing over the years. Mammography is the current gold-standard technique although it is known to be less sensitive in detecting tumors in woman with dense breast tissue. Detecting a...

journal_title：Medical & biological engineering & computing

authors： Wahab AA,Salim MI,Ahamat MA,Manaf NA,Yunus J,Lai KW

更新日期：2016-09-01 00:00:00

abstract：:Recent clinical evidence has suggested that tasks performed in kneeling or squatting postures place the knee at a higher risk for injury because loads across the knee might overload the ligaments. The objective of this study was to develop a subject-specific model of the knee that is kinematically driven to predict th...

journal_title：Medical & biological engineering & computing

authors： Yang Z,Wickwire AC,Debski RE

更新日期：2010-11-01 00:00:00

abstract：:Respiratory rate (RR) is an important vital sign which can be difficult to measure accurately and unobtrusively in routine clinical practice. Pulse transit time (PTT), on the other hand, is unobtrusive to collect from electrocardiogram (ECG) and photoplethysmogram (PPG) signals. Using PTT is a novel method to estimate...

journal_title：Medical & biological engineering & computing

authors： Ding X,Yan BP,Karlen W,Zhang YT,Tsang HK

更新日期：2020-02-01 00:00:00

abstract：:Instrumentation to measure accurately the stresses at the interface of a residual limb and prosthetic socket has a strong potential for use in prosthetic treatment. As a tool in the clinical setting, the device would allow a clinician to identify sites of excessive loading, information which could then be combined wit...

journal_title：Medical & biological engineering & computing

authors： Sanders JE

更新日期：1995-07-01 00:00:00

abstract：:Calcific aortic valve disease (CAVD) is characterized by calcification accumulation and thickening of the aortic valve cusps, leading to stenosis. The importance of fluid flow shear stress in the initiation and regulation of CAVD progression is well known and has been studied recently using fluid-structure interaction...

journal_title：Medical & biological engineering & computing

authors： Halevi R,Hamdan A,Marom G,Lavon K,Ben-Zekry S,Raanani E,Bluestein D,Haj-Ali R

更新日期：2016-11-01 00:00:00

abstract：:The mechanical impedance of the ankle joint during electrical stimulation of the soleus is studied by applying constant-velocity 10 degrees angular perturbations to the ankle and measuring the resultant torque. Both neurologically intact subjects and spinal cord injured subjects are tested. Lumped, piecewise linear mo...

journal_title：Medical & biological engineering & computing

authors： Flaherty B,Robinson C,Agarwal G

更新日期：1994-05-01 00:00:00

abstract：:Disappointing results for total ankle replacement have been explained by poor knowledge of the mechanics of the intact and replaced joints. Dynamic simulation tools have the capacity to simulate dynamic conditions that occur in human joints. The Working Model 2D tool was used to simulate the mechanics of the intact an...

journal_title：Medical & biological engineering & computing

authors： Leardini A,Moschella D

更新日期：2002-03-01 00:00:00

abstract：:Biomechanical models used to estimate joint loads often predict that antagonistic muscles are inactive or underestimate their contributions [3, 5]. This can result in systematic underestimation of muscle force predictions and joint contact forces. To test the feasibility of employing an empirical co-activation ratio t...

journal_title：Medical & biological engineering & computing

authors： Brookham RL,Dickerson CR

更新日期：2014-03-01 00:00:00

abstract：:The physiological parameters of blood such as extracellular Na(+), K(+), Cl(-), pH, 2,3-DPG and ATP and the complex electrical impedance were measured using whole blood samples from 31 male donors (21 donors form the training set and ten donors were used for testing), on the 0th, 10th and 21st day of blood bank storag...

journal_title：Medical & biological engineering & computing

authors： Ulgen Y,Sezdi M

更新日期：2007-07-01 00:00:00

abstract：:A generic framework for the automated classification of human movements using an accelerometry monitoring system is introduced. The framework was structured around a binary decision tree in which movements were divided into classes and subclasses at different hierarchical levels. General distinctions between movements...

journal_title：Medical & biological engineering & computing

authors： Mathie MJ,Celler BG,Lovell NH,Coster AC

更新日期：2004-09-01 00:00:00

abstract：:The aim of this study was to design a new approach for the acquisition of regional radial strain from the middle portion of the interventricular septum. We designed and wrote a program in Matlab (computer-assisted method) for use on a personal computer so that the septum thickness throughout the cardiac cycle could be...

journal_title：Medical & biological engineering & computing

authors： Moladoust H,Mokhtari-Dizaji M,Ojaghi-Haghighi Z,D'hooge J,Noohi F,Khaledifar A,Khajavi A

更新日期：2007-09-01 00:00:00

abstract：:The aim of the study was to develop a method for investigating how interictal epileptic discharges in temporal epilepsy patients are activated spatially. The activity was measured using magneto-encephalography (MEG). The MEG data were used to produce a current-arrow map that reflected the topographic distribution of t...

journal_title：Medical & biological engineering & computing

authors： Kandori A,Oe H,Miyashita K,Date H,Yamada N,Naritomi H,Chiba Y,Murakami M,Miyashita T,Tsukada K

更新日期：2002-05-01 00:00:00

abstract：:In a computer-aided diagnosis (CAD) system, especially for chest radiograph or chest X-ray (CXR) screening, CXR image view information is required. Automatically separating CXR image view, frontal and lateral can ease subsequent CXR screening process, since the techniques may not equally work for both views. We presen...

journal_title：Medical & biological engineering & computing

authors： Santosh KC,Wendling L

更新日期：2018-08-01 00:00:00

abstract：:Computer-based simulations of human hip joints generally include investigating contacts happening among soft or hard tissues during hip movement. In many cases, hip movement is approximated as rotation about an estimated hip center. In this paper, we investigate the effect of different methods used for estimating hip ...

journal_title：Medical & biological engineering & computing

authors： Arbabi E,Schmid J,Boulic R,Thalmann D,Magnenat-Thalmann N

更新日期：2012-06-01 00:00:00

abstract：:A model which assesses the closed-loop interaction between heart period (HP) and arterial pressure (AP) variabilities and the influence of respiration on both is applied to evaluate the sources of low frequency (LF approximately 0.1 Hz) and high frequency (HF, respiratory rate approximately 0.25 Hz) in conscious dogs ...

journal_title：Medical & biological engineering & computing

authors： Baselli G,Cerutti S,Badilini F,Biancardi L,Porta A,Pagani M,Lombardi F,Rimoldi O,Furlan R,Malliani A

更新日期：1994-03-01 00:00:00

abstract：:This study is based on the hypothesis that the pressure within the arterial network can be usefully decomposed as the sum of a reservoir pressure and an excess pressure. The reservoir pressure waveform is defined to be the same in each vessel but delayed by the wave travel time from the root of the aorta. Using calcul...

journal_title：Medical & biological engineering & computing

authors： Parker KH,Alastruey J,Stan GB

更新日期：2012-04-01 00:00:00

abstract：:Spontaneous activity of specific regions (e.g., the Sinoatrial node, SAN) is essential for the normal activation sequence of the heart and also serve as a primary means of modulating cardiac rate by sympathetic tone and circulating catecholamines. The mechanisms of how a small SAN region can electrically drive a much ...

journal_title：Medical & biological engineering & computing

authors： Joyner RW,Wilders R,Wagner MB

更新日期：2007-02-01 00:00:00

abstract：:Determination of the adequacy of dialysis is a routine but crucial procedure in patient evaluation. The total dialysis dose, expressed as Kt/V, has been widely recognised to be a major determinant of morbidity and mortality in haemodialysed patients. Many different factors influence the correct determination of Kt/V, ...

journal_title：Medical & biological engineering & computing

authors： Fernández EA,Valtuille R,Willshaw P,Perazzo CA

更新日期：2003-07-01 00:00:00

abstract：:A hypothetical neuromusculoskeletal model is developed to simulate human normal walking and its modulated behaviors. A small set of neural periodic patterns drive spinal muscle synergies which in turn lead to specific pattern of muscle activation and supraspinal feedback systems maintain postural balance during walkin...

journal_title：Medical & biological engineering & computing

authors： Jo S

更新日期：2008-02-01 00:00:00

abstract：:Impedance cardiography is a low-cost noninvasive technique, based on monitoring of the thoracic impedance, for estimation of stroke volume (SV). Impedance cardiogram (ICG) is the negative of the first derivative of the impedance signal. A technique for beat-to-beat SV estimation using impedance cardiography and artifi...

journal_title：Medical & biological engineering & computing

authors： Naidu SMM,Pandey PC,Bagal UR,Hardas SP

更新日期：2018-06-01 00:00:00

abstract：:The purpose of this study is to investigate the change in biomechanical milieu following removal of pedicle screws in instrumented single level lumbar arthrodesis. Using a validated finite element (FE) model of the intact lumbar spine (L2-5), two scenarios of L3-4 lumbar fusion were simulated: posterolateral fusion (P...

journal_title：Medical & biological engineering & computing

authors： Kim HJ,Chun HJ,Moon SH,Kang KT,Kim HS,Park JO,Moon ES,Sohn JS,Lee HM

更新日期：2010-07-01 00:00:00

abstract：:It is clinically well-established that minimally invasive subcutaneous continuous glucose monitoring (CGM) sensors can significantly improve diabetes treatment. However, CGM readings are still not as reliable as those provided by standard fingerprick blood glucose (BG) meters. In addition to unavoidable random measure...

journal_title：Medical & biological engineering & computing

authors： Facchinetti A,Del Favero S,Sparacino G,Cobelli C

更新日期：2015-12-01 00:00:00

abstract：:This work addresses the problem of estimating the conduction velocity (CV) of single motor unit (MU) action potentials from surface EMG signals detected with linear electrode arrays during voluntary muscle contractions. In ideal conditions, that is without shape or scale changes of the propagating signals and with add...

journal_title：Medical & biological engineering & computing

authors： Farina D,Muhammad W,Fortunato E,Meste O,Merletti R,Rix H

更新日期：2001-03-01 00:00:00