Noise reduction in magnetocardiography by singular value decomposition and independent component analysis.

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：:Performance evaluations of ion-selective field-effect transistors (ISFETs) have been carried out using both quality-control materials and whole arterial blood samples. Comparison of the results from these evaluations suggests that the whole blood evaluation may be more useful when assessing the value of particular sen...

journal_title：Medical & biological engineering & computing

authors： Thompson JM

更新日期：1990-05-01 00:00:00

abstract：:Trabecular bone has a complicated porous microstructure and consists of interconnected plates and rods known as trabeculae. The microarchitecture of the trabeculae contributes to load distribution capacity and, particularly, the optimal bone strength. Many previous studies have shown that morphological parameters are ...

journal_title：Medical & biological engineering & computing

authors： Basaruddin KS,Takano N,Yoshiwara Y,Nakano T

更新日期：2012-10-01 00:00:00

abstract：:Neuronal excitability is determined in a complex way by several interacting factors, such as membrane dynamics, fibre geometry, electrode configuration, myelin impedance, neuronal terminations[Formula: see text] This study aims to increase understanding in excitability, by investigating the impact of these factors on ...

journal_title：Medical & biological engineering & computing

authors： Tarnaud T,Joseph W,Martens L,Tanghe E

更新日期：2018-09-01 00:00:00

abstract：:The relation is investigated between stimulus frequency, stimulus pulse amplitude and the neural damage induced by continuous stimulation of the cat's sciatic nerve. The chronically implanted electrodes were pulsed continuously and the effects of the electrical stimulation were quantified as the amount of early axonal...

journal_title：Medical & biological engineering & computing

authors： McCreery DB,Agnew WF,Yuen TG,Bullara LA

更新日期：1995-05-01 00:00:00

abstract：:Laser Doppler imaging (LDI) is investigated as a novel method for in vivo ligament tissue blood flow determination. LDI output signal is obtained from surgically exposed rabbit medial collateral ligaments (MCL). The LDI signal is compared with simultaneously determined, coloured microsphere (CM)-derived standardised M...

journal_title：Medical & biological engineering & computing

authors： Bray R,Forrester K,McDougall JJ,Damji A,Ferrell WR

更新日期：1996-05-01 00:00:00

abstract：:The paper explains the application of a genetic algorithm (GA) to the problem of estimating parameters for a kinetic model of a biologically reacting system. It is demonstrated that the GA is a powerful tool for quantifying the kinetic parameters using kinetic data. As the operation of the GA does not depend on the fo...

journal_title：Medical & biological engineering & computing

authors： Park LJ,Park CH,Park C,Lee T

更新日期：1997-01-01 00:00:00

abstract：:Intra-aortic balloon pump (IABP) is normally contraindicated in significant aortic regurgitation (AR). It causes and aggravates pre-existing AR while performing well in the event of mitral regurgitation (MR). Indirect parameters, such as the mean systolic pressure, product of heart rate and peak systolic pressure, and...

journal_title：Medical & biological engineering & computing

authors： Kim CH,Song KS,Trayanova NA,Lim KM

更新日期：2018-05-01 00:00:00

abstract：:To explore the promising therapeutic applications of short nanosecond electric pulses, in vitro and in vivo experiments are highly required. In this paper, an exposure system based on monopole patch antenna is reported to perform in vivo experiments on newborn mice with both monopolar and bipolar nanosecond signals. A...

journal_title：Medical & biological engineering & computing

authors： Merla C,Apollonio F,Paffi A,Marino C,Vernier PT,Liberti M

更新日期：2017-07-01 00:00:00

abstract：:The regulation of cerebral blood flow (CBF) following changes in arterial blood pressure (ABP) and end-tidal pCO2 (EtCO2) are of clinical interest in assessing cerebrovascular reserve capacity. Linear finite-impulse-response modelling is applied to ABP, EtCO2 and CBF velocity (CBFV, from transcranial Doppler measureme...

journal_title：Medical & biological engineering & computing

authors： Simpson DM,Panerai RB,Evans DH,Garnham J,Naylor AR,Bell PR

更新日期：2000-09-01 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：:Instantaneous backflow through central clearance of bileaflet heart valves at the instant of closure is investigated. An Edwards-Duromedics valve in the mitral position is employed to measure the transient pressures near the entrance and exit region in an in vitro flow chamber. A region surrounding the clearance is mo...

journal_title：Medical & biological engineering & computing

authors： Lee CS,Chandran KB

更新日期：1995-05-01 00:00:00

abstract：:The development of computer technology now allows the quick and efficient automatic fluorescence microscopy generation of a large number of images of proteins in specific subcellular compartments using fluorescence microscopy. Digital image processing and pattern recognition technology can easily classify these images...

journal_title：Medical & biological engineering & computing

authors： Zhang X,Zhao SG

更新日期：2019-06-01 00:00:00

abstract：:Functional magnetic resonance imaging (FMRI) is an imaging technique for determining which regions of the brain are activated in response to a stimulus or event. Early FMRI experiment paradigms were based upon those used in positron emission tomography (PET), i.e. employing a block design consisting of extended period...

journal_title：Medical & biological engineering & computing

authors： Burke D,Murphy K,Garavan H,Reilly R

更新日期：2004-09-01 00:00:00

abstract：:Cardiotocography is the most diffused prenatal diagnostic technique in clinical routine. The simultaneous recording of foetal heart rate (FHR) and uterine contractions (UC) provides useful information about foetal well-being during pregnancy and labour. However, foetal electronic monitoring interpretation still lacks ...

journal_title：Medical & biological engineering & computing

authors： Romano M,Bifulco P,Cesarelli M,Sansone M,Bracale M

更新日期：2006-03-01 00:00:00

abstract：:To evaluate the possibility of respiratory-volume measurement using photoplethysmography (PPG), PPG signals from 16 normal volunteers are collected, and the respiratory-induced intensity variations (RIIV) are digitally extracted. The RIIV signals are studied while respiratory volume is varied. Furthermore, respiratory...

journal_title：Medical & biological engineering & computing

authors： Johansson A,Oberg PA

更新日期：1999-01-01 00:00:00

abstract：:Automatic identification of landmarks in cephalometry is very important and useful for orthognathic surgery. A computerised automatic cephalometric analysis system (CACAS), based on image processing, is presented. For an original X-ray image, median filtering and histogram equalisation are used to improve image qualit...

journal_title：Medical & biological engineering & computing

authors： Yang J,Ling X,Lu Y,Wei M,Ding G

更新日期：2001-05-01 00:00:00

abstract：:Dynamic methods in the spectral domain are necessary to analyse biological signals because of the frequently nonstationary character of the signals. The paper presents an adaptive procedure of fitting time-dependent ARMA models to nonstationary signals, which is suitable for on-line calculations. The properties of the...

journal_title：Medical & biological engineering & computing

authors： Schack B,Bareshova E,Grieszbach G,Witte H

更新日期：1995-05-01 00:00:00

abstract：:When the microvascular blood perfusion in human skin is measured by photoplethysmography (PPG), infra-red light (800-960 nm) is normally used as the light source. The PPG signal, which consists of a pulsatile (AC) and a slowly fluctuating (DC) component, was studied at different optical wavelengths utilising optical f...

journal_title：Medical & biological engineering & computing

authors： Lindberg LG,Oberg PA

更新日期：1991-01-01 00:00:00

abstract：:Spinal cord injury patients are under daily risk for developing deep tissue injury which is a severe pressure ulcer that initiates in soft tissues at the bones' proximity. We aimed to formulate a patient-specific biomechanical model that can continuously monitor internal tissue stresses in real time. We adopted a form...

journal_title：Medical & biological engineering & computing

authors： Portnoy S,Vuillerme N,Payan Y,Gefen A

更新日期：2011-04-01 00:00:00

abstract：:Both invasive left-ventricular pressure measurements and non-invasive colour M-mode echographic measurements have shown the existence of intraventricular pressure gradients (IVPGs) during early filling. The mechanisms responsible for these IVPG cannot be completely explained by the experiments. Therefore a one-dimensi...

journal_title：Medical & biological engineering & computing

authors： Verdonck P,Vierendeels J,Riemslagh K,Dick E

更新日期：1999-07-01 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：:The Chinese herb radix Salviae miltiorrhizae (RSM) is used in traditional Chinese medicine as a treatment for cardiovascular and cerebrovascular diseases. Several components of the plant extract from salvia mitorrhiza bunge have been determined previously, one of which is protocatechuic acid (PAC). It has been found, ...

journal_title：Medical & biological engineering & computing

authors： Zhou-Stache J,Buettner R,Artmann G,Mittermayer C,Bosserhoff AK

更新日期：2002-11-01 00:00:00

abstract：:Precise segmentation of stroke lesions from brain magnetic resonance (MR) images poses a challenging task in automated diagnosis. In this paper, we proposed a new method called watershed-based lesion segmentation algorithm (WLSA), which is a novel intensity-based segmentation technique used to delineate infarct lesion...

journal_title：Medical & biological engineering & computing

authors： Subudhi A,Jena S,Sabut S

更新日期：2018-05-01 00:00:00

abstract：:Tooth mobility examination is important in planning dental treatment, as it may give an indication of alveolar bone loss and the condition of the periodontal ligament. In clinical dental diagnosis a manual tooth mobility examination is useful. However, its determination of tooth mobility is subjective and depends on t...

journal_title：Medical & biological engineering & computing

authors： Oka H,Yamamoto T,Saratani K,Kawazoe T

更新日期：1989-01-01 00:00:00

abstract：:In the case of female breast cancer, a breast-conserving excision is often desirable. This surgery is based on preoperatively gathered MRI, mammography, and sonography images. These images are recorded in multiple patient positions, e. g., 2D mammography images in standing position with a compressed breast and 3D MRI ...

journal_title：Medical & biological engineering & computing

authors： Esslinger D,Rapp P,Knödler L,Preibsch H,Tarín C,Sawodny O,Brucker SY,Hahn M

更新日期：2019-07-01 00:00:00

abstract：:We propose a new method for breast X-ray image adaptive enhancement that combines nonsubsampled contourlet transform (NSCT) with the whale optimization algorithm (WOA). First, the mammography X-ray image was processed by histogram equalization to ensure global image contrast. The processed image was then decomposed in...

journal_title：Medical & biological engineering & computing

authors： Zhang CJ,Nie HH

更新日期：2019-10-01 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 aim of this study was the analysis of the mechanical behaviour of a partially porous lumbar custom-made cage by means of a subject-specific finite element analysis (FEA). The cage, made of Ti6Al4V ELI alloy, was produced via electron beam melting (EBM) process and surgically implanted in a female subject, 50 years...

journal_title：Medical & biological engineering & computing

authors： Epasto G,Distefano F,Mineo R,Guglielmino E

更新日期：2019-12-01 00:00:00

abstract：:Whether Fourier transform infra-red spectroscopy with an attenuated total reflection prism could be applied for noninvasive glucose measurement through oral mucosa was evaluated. As a result, the same absorbance peak at 1033 cm-1 as in glucose aqueous solution was found in the absorbance spectra through mucous membran...

journal_title：Medical & biological engineering & computing

authors： Kajiwara K,Uemura T,Kishikawa H,Nishida K,Hashiguchi Y,Uehara M,Sakakida M,Ichinose K,Shichiri M

更新日期：1993-07-01 00:00:00