Abstract:
:Beat detection is a basic and fundamental step in electrocardiogram (ECG) processing. In many ECG applications strong artifacts from biological or technical sources could appear and cause distortion of ECG signals. Beat detection algorithm desired property is to avoid these distortions and detect beats in any situation. Our developed method is an extension of Christov's beat detection algorithm, which detects beat using combined adaptive threshold on transformed ECG signal (complex lead). Our offline extension adds estimation of independent components of measured signal into the transformation of ECG creating a signal called complex component, which enhances ECG activity and enables beat detection in presence of strong noises. This makes the beat detection algorithm much more robust in cases of unpredictable noise appearances, typical for holter ECGs and telemedicine applications of ECG. We compared our algorithm with the performance of our implementation of the Christov's and Hamilton's beat detection algorithm.
journal_name
Med Eng Physjournal_title
Medical engineering & physicsauthors
Kuzilek J,Lhotska Ldoi
10.1016/j.medengphy.2012.07.017subject
Has Abstractpub_date
2013-06-01 00:00:00pages
704-11issue
6eissn
1350-4533issn
1873-4030pii
S1350-4533(12)00213-5journal_volume
35pub_type
杂志文章abstract::The objective of this work is to develop a robust method for human abdominal aortic aneurysm (AAA) centerline detection that can contribute to the accurate computation of features for the prediction of AAA rupture risk. A semiautomatic algorithm is proposed for detecting the lumen centerline in contrast-enhanced abdom...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2013.03.005
更新日期:2013-09-01 00:00:00
abstract::Quantifying the risk of falling (falls risk) would be helpful in treating people with gait disorders. The gait sensitivity norm (GSN) is a stability measure that correlates well to risk of falling in passive dynamic walkers but has not been evaluated on humans or human-like walking models. We assessed the correlation ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2013.03.018
更新日期:2013-10-01 00:00:00
abstract::In stark contrast to the inspiring functionality of the natural hand, limitations of current upper limb prostheses stemming from marginal feedback control, challenges of mechanical design, and lack of sensory capacity, are well-established. This paper provides a critical review of current sensory systems and the poten...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2005.09.009
更新日期:2006-07-01 00:00:00
abstract::Segmentation of medical images is very important for clinical research and diagnosis, leading to a requirement for robust automatic methods. This paper reports on the combined use of a neural network (a multilayer perceptron, MLP) and active contour model ('snake') to segment structures in magnetic resonance (MR) imag...
journal_title:Medical engineering & physics
pub_type: 临床试验,杂志文章
doi:10.1016/s1350-4533(03)00137-1
更新日期:2004-01-01 00:00:00
abstract::In vivo bone behaviour predictions with respect to altered loading conditions, implants, and endoprostheses are highly desirable to avoid untoward effects such as implant loosening and breakage. This knowledge does not relate only to the result but also to the mechanisms of bone adaptation and bone growth. Since bone ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(94)90014-0
更新日期:1994-01-01 00:00:00
abstract::Cervical spinal instability due to ligamentous injury, degenerated disc and facetectomy is a subject of great controversy. There is no analytical investigation reported on the biomechanical response of cervical spine in these respects. Parametric study on the roles of ligaments, facets, and disc nucleus of human lower...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(01)00036-4
更新日期:2001-04-01 00:00:00
abstract::Taper connections of modular hip prostheses are at risk of fretting and corrosion, which can result in reduced implant survival. The purpose of this study was to identify the minimum torque required to initiate a removal of the passivation layer at the taper interface as a function of assembly force and axial load. Ti...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2014.06.011
更新日期:2014-09-01 00:00:00
abstract::This article investigates whether prediction of subject-specific physiological data is viable through an individualised computational model of a cochlear implant. Subject-specific predictions could be particularly useful to assess and quantify the peripheral factors that cause inter-subject variations in perception. T...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2012.09.001
更新日期:2013-07-01 00:00:00
abstract::An 'instantaneous' optimal filter is presented for improving the signal-to-noise ratio in averaged electrocardiograms (ECGs). The filter design is based on a simple model that accounts for correlation across the ensemble of beats but ignores correlation in time. Another property of the model is that the noise level is...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(96)00069-0
更新日期:1997-04-01 00:00:00
abstract::Rapid fluid administration is the cornerstone of successful trauma resuscitation of patients in a state of shock. Intravenous (IV) fluid delivery is a physical intrusion into a vein which results in a complex interaction between the rigid catheter and the compliant vein. We present an experimental model of IV infusion...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(00)00046-1
更新日期:2000-07-01 00:00:00
abstract::Fitts' Law was extended in the polar coordinate system, and a set of indices for human motion evaluation is proposed. In this paper, the index of difficulty and the index of performance are introduced as the general indices for the quality measure of plane target-to-target movement. As an example, the target-reaching ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(01)00121-7
更新日期:2002-03-01 00:00:00
abstract::Total hip arthroplasty (THA) broaching involves impacting a broach handle with a mallet, facilitating force transmission to progress broaches into the femoral medullary canal. Limited surgical access during direct anterior THAs increases off-axis forces, potentially contributing to tissue damage. The aim was to charac...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2019.12.004
更新日期:2020-02-01 00:00:00
abstract::We adopt the Ensemble Empirical Mode Decomposition (EEMD) method, with an appropriate thresholding on the Intrinsic Mode Functions (IMFs), to denoise the magnetocardiography (MCG) signal. To this end, we discuss the two associated problems that relate to: (i) the amplitude of noise added to the observed signal in the ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2014.06.023
更新日期:2014-10-01 00:00:00
abstract::Schlemm's canal (SC) is a ring structure responsible for maintaining fluid homeostasis in the anterior chamber of the eye by draining aqueous humor (AH) from the trabecular meshwork (TM) into the collecting channel (CC). Obstruction of the AH flow in this conventional pathway leads to an elevation of intraocular press...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2020.12.005
更新日期:2021-02-01 00:00:00
abstract::The incudostapedial joint (ISJ) is a synovial joint connecting the incus and stapes in the middle ear. Mechanical properties of the ISJ directly affect sound transmission from the tympanic membrane to the cochlea. However, how ISJ properties change with frequency has not been investigated. In this paper, we report the...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2018.02.006
更新日期:2018-04-01 00:00:00
abstract::A three-layer artificial neural network was used for adaptive control of gait swing generated by neuromuscular electrical stimulation (NMES) in a spinal cord injured subject. Network inputs consisted of knee and ankle goniometer signals for System 1, and knee and hip angular data for System 2. Controller output was pr...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(96)00030-6
更新日期:1997-01-01 00:00:00
abstract::The prerequisite for the continuous in vivo monitoring of glucose concentration is the development of an implantable glucose sensor with long-term stability. A new enzyme electrode concept featuring fluid-state glucose oxidase modified carbon powder along with a cross-linked glucose oxidase enzyme layer has been devel...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(90)90008-v
更新日期:1994-09-01 00:00:00
abstract::The biomechanical strength of the skeleton, and hence the risk of future fractures, depends on both the bone quantity (assessed in terms of bone mineral density) and bone quality (assessed in terms of the integrity of its internal architecture). Precise methods of measuring the calcium-equivalent density of both the t...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(96)00011-2
更新日期:1996-10-01 00:00:00
abstract::To better understand the mechanisms underlying distal radius fracture we have developed finite element models to predict radius bone strain and fracture strength under loading conditions simulating a fall. This study compares experimental surface strains and fracture loads of the distal radius with specimen-specific f...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2011.07.016
更新日期:2012-04-01 00:00:00
abstract::Despite its medical relevance, accurate recognition of sedentary (sitting and lying) and dynamic activities (e.g. standing and walking) remains challenging using a single wearable device. Currently, trunk-worn wearable systems can differentiate sitting from standing with moderate success, as activity classifiers often...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2014.01.001
更新日期:2014-06-01 00:00:00
abstract::The presented research positively evaluates the vocality of the cough sound by estimating the global cough fundamental frequency or pitch. The fundamental frequency was determined by autocorrelation analysis on both the original time-signal and the linear predicted time-signal. The experimental cough database was regi...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(02)00055-3
更新日期:2002-09-01 00:00:00
abstract::The BION (Bionic Neuron) is a single channel implantable neurostimulator of unique design that can be delivered by injection. The development of the BION injectable neurostimulators exemplifies a challenging, but well posed medical design problem addressed with a successful strategy for prioritizing and resolving the ...
journal_title:Medical engineering & physics
pub_type: 杂志文章,评审
doi:10.1016/j.medengphy.2010.08.010
更新日期:2011-01-01 00:00:00
abstract::Recent approaches to the in vitro experimental study of cardiac fluid mechanics involve the use of whole biological structures to investigate in the lab novel therapeutic approaches for the treatment of heart pathologies. To enhance reliability and repeatability, the influence of the actuation strategy of the experime...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.01.007
更新日期:2016-04-01 00:00:00
abstract::The purpose of this study was to determine the use and feasibility of accelerometry-based monitoring and to examine a discrete multi-resolution signal analysis technique to determine motoric subtypes in patients with DSM-IV delirium. Forty consecutive patients receiving palliative care (23 male, 17 female, mean age+/-...
journal_title:Medical engineering & physics
pub_type: 临床试验,杂志文章
doi:10.1016/j.medengphy.2009.10.012
更新日期:2010-03-01 00:00:00
abstract::Pressure ulcers are a major problem worldwide believed to affect over 5% of all hospital in-patients, and countless others in the community at large. Many types of Patient Support Systems (PSS) are sold as pressure ulcer prevention equipment, but no consensus exists as to their mechanical efficacy. The use of human vo...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(99)00053-3
更新日期:1999-06-01 00:00:00
abstract::Investigations into the effects of sterilization on a new biomechanical pressure sensor are necessary before contemplating in vivo use. Ten, designated Experimental, "K-Scan" digital pressure sensor arrays were sterilized with ethylene oxide gas (EtO), and their ability to accurately and reproducibly measure an applie...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(03)00119-x
更新日期:2003-11-01 00:00:00
abstract::Understanding hip osteoarthritis requires new investigational tools for quantitative studies of biophysical and biomechanical properties as well as for determination of structure. Three new protocols to study pathological changes in cartilage and to measure cartilage thickness in intact human hips are described using ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2019.08.003
更新日期:2019-11-01 00:00:00
abstract::Terahertz pulsed imaging is a spectroscopic imaging modality using pulses of electromagnetic radiation (100 GHz-10 THz), and there has been recent interest in studying biomedical specimens. It is usual to display parametric images derived from the measured pulses. In this work, classification was achieved by applying ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2004.02.011
更新日期:2004-06-01 00:00:00
abstract::Some pulmonary diseases and injuries are believed to correlate with lung viscoelasticity changes. Hence, a better understanding of lung viscoelastic models could provide new perspectives on the progression of lung pathology and trauma. In the presented study, stress relaxation measurements were performed to quantify r...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2015.05.003
更新日期:2015-08-01 00:00:00
abstract::Cerebral autoregulation (CA) is the mechanism that aims to maintain adequate cerebral perfusion during changes in blood pressure (BP). Transfer function analysis (TFA), the most reported method in literature to quantify CA, shows large between-study variability in outcomes. The aim of this study is to investigate the ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.02.001
更新日期:2016-05-01 00:00:00