Analysis of macro- and microstructures of normal and pathological tissues by ultrasonic backscattering techniques.

abstract：:One challenge in the current research of brain-computer interfaces (BCIs) is how to classify time-varying electroencephalographic (EEG) signals as accurately as possible. In this paper, we address this problem from the aspect of updating feature extractors and propose an adaptive feature extractor, namely adaptive com...

journal_title：Medical & biological engineering & computing

authors： Sun S,Zhang C

更新日期：2006-10-01 00:00:00

abstract：:Reactive hyperaemia is the term given to the temporary increase in blood flow that follows release of an occlusion of the arterial supply. Measurement of reactive hyperaemia in the leg below the knee is useful in assessment of the vascular system, as resting flows remain unaffected even in the presence of quite severe...

journal_title：Medical & biological engineering & computing

authors： Smye SW,Bloor MI

更新日期：1994-09-01 00:00:00

abstract：:The changes in the power spectra of single-fibre extracellular action potentials (SFEAPs) generated in an infinite anisotropic frequency-dependent volume conductor, which occurred as a result of alterations in the propagation velocity v and duration T(in) of the intracellular action potential (IAP) were analytically d...

journal_title：Medical & biological engineering & computing

authors： Dimitrov GV,Lateva ZC,Dimitrova NA

更新日期：1992-07-01 00:00:00

abstract：:Photoplethysmography imaging (PPGI) for non-contact monitoring of preterm infants in the neonatal intensive care unit (NICU) is a promising technology, as it could reduce medical adhesive-related skin injuries and associated complications. For practical implementations of PPGI, a region of interest has to be detected ...

journal_title：Medical & biological engineering & computing

authors： Antink CH,Ferreira JCM,Paul M,Lyra S,Heimann K,Karthik S,Joseph J,Jayaraman K,Orlikowsky T,Sivaprakasam M,Leonhardt S

更新日期：2020-12-01 00:00:00

abstract：:One of the most common cancer types among women is breast cancer. Regular mammographic examinations increase the possibility for early diagnosis and treatment and significantly improve the chance of survival for patients with breast cancer. Clustered microcalcifications have been considered as important indicators of ...

journal_title：Medical & biological engineering & computing

authors： Spyrou G,Kapsimalakou S,Frigas A,Koufopoulos K,Vassilaros S,Ligomenides P

更新日期：2006-11-01 00:00:00

abstract：:In cranioplasty, neurosurgeons use bone grafts to repair skull defects. To ensure the protection of intracranial tissues and recover the original head shape for aesthetic purposes, a custom-made pre-fabricated prosthesis must match the cranial incision as closely as possible. In our previous study (Liao et al. in Med ...

journal_title：Medical & biological engineering & computing

authors： Liao YL,Lu CF,Wu CT,Lee JD,Lee ST,Sun YN,Wu YT

更新日期：2013-02-01 00:00:00

abstract：:A thin-walled capsule, modelled as an incompressible liquid droplet contained in a thin flexible membrane, was allowed to adhere onto a rigid substrate. The contact mechanics were formulated, based on linear elasticity, to portray quantitatively the relationships between osmotic inflation, contact area and angle, memb...

journal_title：Medical & biological engineering & computing

authors： Wan KT,Liu KK

更新日期：2001-09-01 00:00:00

abstract：:We introduce a novel method for an automatic classification of subjects to those with or without neuromuscular disorders. This method is based on multiscale entropy of recorded surface electromyograms (sEMGs) and support vector classification. The method was evaluated on a single-channel experimental sEMGs recorded fr...

journal_title：Medical & biological engineering & computing

authors： Istenic R,Kaplanis PA,Pattichis CS,Zazula D

更新日期：2010-08-01 00:00:00

abstract：:A method for making a current-ratio map to determine the ischaemic area of angina pectoris (AP) patients has been developed. This method uses a current-arrow map calculated using a ORS wave from 64-channel magnetocardiogram (MCG) signals. The current-ratio map can be calculated from the ratio of an exercise-induced cu...

journal_title：Medical & biological engineering & computing

authors： Kandori A,Kanzaki H,Miyatake K,Hashimoto S,Itoh S,Tanaka N,Miyashita T,Tsukada K

更新日期：2001-01-01 00:00:00

abstract：:Several recent studies have quantified abnormalities in Parkinsonian gait. However, few studies have attempted to quantify the regularity of body motion during walking in patients with Parkinson's disease. The aim of the paper was to characterise body motion patterns in healthy, elderly subjects and patients with Park...

journal_title：Medical & biological engineering & computing

authors： Sekine M,Akay M,Tamura T,Higashi Y,Fujimoto T

更新日期：2004-01-01 00:00:00

abstract：:Aortic stiffness measurement is well recognized as an independent predictor of cardiovascular mortality and morbidity. Recently, a simple method has been proposed for the evaluation of the local aortic stiffness (AoStiff) using a non-invasive bioelectrical impedance (BI) technique. This approach relies on a novel inte...

journal_title：Medical & biological engineering & computing

authors： Collette M,Lalande A,Willoteaux S,Leftheriotis G,Humeau A

更新日期：2011-04-01 00:00:00

abstract：:During dialysis the ion concentrations in many body fluids change significantly. The influence of these changes on the accuracy of volume measurements with bioimpedance spectroscopy is investigated by the following procedure: Plasma ion concentrations and impedance spectra (5-500 kHz) are measured during six standard ...

journal_title：Medical & biological engineering & computing

authors： Scharfetter H,Wirnsberger GH,Holzer H,Hutten H

更新日期：1997-03-01 00:00:00

abstract：:Cardiac resynchronization therapy (CRT) with biventricular pacing (BV) is an established therapy for heart failure (HF) patients with inter- and intraventricular conduction delay. The aim of this pilot study was to test the feasibility of both transesophageal measurement of left ventricular (LV) electrical delay and t...

journal_title：Medical & biological engineering & computing

authors： Heinke M,Ismer B,Kühnert H,Figulla HR

更新日期：2011-08-01 00:00:00

abstract：:Blood oxygenation level is an important measure that can be used alongside functional magnetic resonance imaging data in order to obtain closer correlates of neuronal activation. A robust estimate of this measure has thus far not been demonstrated. This is mainly due to the lack of knowledge of the underlying paramete...

journal_title：Medical & biological engineering & computing

authors： Dagher J,Du YP

更新日期：2012-05-01 00:00:00

abstract：:Spectral analysis of heart rate variability (HRV) is an accepted method for assessment of cardiac autonomic function and its relationship to numerous disorders and diseases. Various non-parametric methods for HRV estimation have been developed. The spectrum of counts, the instantaneous heart rate spectrum and the inte...

journal_title：Medical & biological engineering & computing

authors： Mitov IP,Daskalov IK

更新日期：1998-09-01 00:00:00

abstract：:The performance of the stimulation coil in a magnetic nerve stimulator can be improved by attaching a ferromagnetic structure to the coil. This reduces heat generation at the coil and increases magnetic field strength for a given unit of current. Some technical aspects of the design of a stimulation coil with a ferrom...

journal_title：Medical & biological engineering & computing

authors： Han BH,Lee SY,Kim JH,Yi JH

更新日期：2003-09-01 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：:The reconstruction of bioluminescence tomography (BLT) is severely ill-posed due to the insufficient measurements and diffuses nature of the light propagation. Predefined permissible source region (PSR) combined with regularization terms is one common strategy to reduce such ill-posedness. However, the region of PSR i...

journal_title：Medical & biological engineering & computing

authors： Yang D,Wang L,Chen D,Yan C,He X,Liang J,Chen X

更新日期：2018-11-01 00:00:00

abstract：:The purpose of the present study is to analyze the prognostic factors of acute leukemia and to construct a decision model based on a causal relationship between the factors of this disease to assist medical specialists. In medical decisions, to reach effective, quick, and reliable results, there is a need for a simple...

journal_title：Medical & biological engineering & computing

authors： Jahangoshai Rezaee M,Sadatpour M,Ghanbari-Ghoushchi N,Fathi E,Alizadeh A

更新日期：2020-11-01 00:00:00

abstract：:The authors have applied estimation theory to the problem of determining primary current distributions from measured neuromagnetic fields. In this procedure, essentially nothing is assumed about the source currents, except that they are spatially restricted to a certain region. Simulation experiments show that the res...

journal_title：Medical & biological engineering & computing

authors： Hämäläinen MS,Ilmoniemi RJ

更新日期：1994-01-01 00:00:00

abstract：:From adult data, it is known that numerous factors, such as age, state of the autonomic nervous system, diurnal rhythms or mean R-R interval mRR, influence heart rate variability (HRV). The aim of this study was the examination of the influence of gestational age, mRR, gender and time of day on fetal HRV. The analysis...

journal_title：Medical & biological engineering & computing

authors： Lange S,Van Leeuwen P,Geue D,Hatzmann W,Grönemeyer D

更新日期：2005-07-01 00:00:00

abstract：:An automatic power-generating system (AGS) which converts kinetic energy into electric energy for quartz watches was tested as a power source for implantable cardiac pacemakers. An automatic power-generating mechanism and a capacitor (0.33 F) were removed from a quartz watch (SEIKO) and encapsulated in a polyvinyl cas...

journal_title：Medical & biological engineering & computing

authors： Goto H,Sugiura T,Harada Y,Kazui T

更新日期：1999-05-01 00:00:00

abstract：:The paper describes the application of new semi-automatic segmentation software to the task of detection of anatomical structures and lesion and their three-dimensional (3D) visualisation in 23 patients with secondary progressive multiple sclerosis (MS). The purpose is to study the correlation between magnetic resonan...

journal_title：Medical & biological engineering & computing

authors： Dastidar P,Heinonen T,Vahvelainen T,Elovaara I,Eskola H

更新日期：1999-01-01 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：:The surface electroenterogram (EEnG) is a non-invasive method of studying myoelectrical bowel activity. However, surface EEnG recordings are contaminated by cardiac activity, respiratory and motion artifacts, and other sources of interference. The aim of this work is to remove the respiration artifact and the very low...

journal_title：Medical & biological engineering & computing

authors： Ye Y,Garcia-Casado J,Martinez-de-Juan JL,Ponce JL

更新日期：2007-06-01 00:00:00

abstract：:To study the effects of the geometrical characteristics of a framing coil on aneurysm thromboembolization efficacy, the hemodynamics in lateral aneurysms filled with coils having a different shape, orientation, and thickness were analyzed using computational fluid dynamics. The aneurysms packed with vortex and cage-sh...

journal_title：Medical & biological engineering & computing

authors： Jeong W,Han MH,Rhee K

更新日期：2013-09-01 00:00:00

abstract：:Measurements of the dielectric properties of healthy and atherosclerotic human artery tissues were made in the frequency range of 100 Hz-100 kHz and temperatures from 22 to 260 degrees C. The temperature dependencies of the dielectric parameters for healthy tissues reveal distinctively the temperature ranges correspon...

journal_title：Medical & biological engineering & computing

authors： Brzeziński J,Oszkinis G,Marzec E

更新日期：2007-06-01 00:00:00

abstract：:This study explores the analysis of a new stent geometry from two typical stents used to treat the coronary artery disease. Two different finite element methods are applied with different boundary conditions to investigate the stenosis region. Computational fluid dynamics (CFD) models including fluid-structure interac...

journal_title：Medical & biological engineering & computing

authors： Simão M,Ferreira JM,Mora-Rodriguez J,Fragata J,Ramos HM

更新日期：2017-06-01 00:00:00

abstract：:Quantitative sensory testing (QST) can provide useful information about the underlying mechanisms involved in chronic pain. However, currently available devices typically employed suffer from operator-dependent effects, or are too cumbersome for routine clinical care. This paper presents the design and initial validat...

journal_title：Medical & biological engineering & computing

authors： Harte SE,Mitra M,Ichesco EA,Halvorson ME,Clauw DJ,Shih AJ,Kruger GH

更新日期：2013-06-01 00:00:00

abstract：:A new method of stimulation of the lower extremities was devised that automatically adjusts the stimulation conditions at any angle of the knee joint. An M-wave is considered to indicate the stimulation conditions, because it is the waveform that results from direct stimulation to the axon of the alpha motor neuron. T...

journal_title：Medical & biological engineering & computing

authors： Tanabe S,Muraoka Y,Tomita Y

更新日期：2004-01-01 00:00:00