IEEE Transactions on Biomedical Engineering
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Methods for onset detection of voluntary motor responses in tremor patients
IEEE Transactions on Biomedical Engineering - Tập 43 Số 2 - Trang 177-188 - 1996
Estimation of neural dynamics from MEG/EEG cortical current density maps: application to the reconstruction of large-scale cortical synchrony
IEEE Transactions on Biomedical Engineering - Tập 49 Số 9 - Trang 975-987 - 2002
There is a growing interest in elucidating the role of specific patterns of neural dynamics-such as transient synchronization between distant cell assemblies-in brain functions. Magnetoencephalography (MEG)/electroencephalography (EEG) recordings consist in the spatial integration of the activity from large and multiple remotely located populations of neurons. Massive diffusive effects and poor si...... hiện toàn bộ
#Electroencephalography #Current density #Large-scale systems #Signal to noise ratio #Inverse problems #Assembly #Magnetoencephalography #Neurons #Signal resolution #Robustness
Deconvolution estimation of motor unit conduction velocity distribution
IEEE Transactions on Biomedical Engineering - Tập 49 Số 9 - Trang 955-962 - 2002
A conduction velocity distribution (CVD) estimator that incorporates volume conductor modeling of the muscle voluntary response is introduced in this paper. The CVD estimates are obtained from two correlation functions, an autocorrelation and a cross, computed from myoelectric signal recorded at the skin surface. The performance of the proposed estimator is evaluated for simulated and experimental...... hiện toàn bộ
#Deconvolution #Muscles #Pediatrics #Delay estimation #Conductors #Skin #Computational modeling #Delay effects #Autocorrelation #Filtering
Matched-filter template generation via spatial filtering: application to fetal biomagnetic recordings
IEEE Transactions on Biomedical Engineering - Tập 49 Số 10 - Trang 1214-1217 - 2002
We have developed a two-step procedure for signal processing of fetal biomagnetic recordings that removes cardiac interference and noise. First, a modified matched filter (MF) is applied to remove maternal cardiac interference; then, a simple signal space projection (SSP) is applied to remove noise. The key difference between our MF and a conventional one is that the interference template and the ...... hiện toàn bộ
#Matched filters #Filtering #Biomagnetics #Interference #Biomedical signal processing #Magnetic separation #Morphology #Noise reduction #Physics #Signal processing
Optimal excitation wavelengths for discrimination of cervical neoplasia
IEEE Transactions on Biomedical Engineering - Tập 49 Số 10 - Trang 1102-1111 - 2002
Fluorescence spectroscopy has shown promise for the in vivo, real-time detection of cervical neoplasia. However, selection of excitation wavelength has in the past been based on in vitro studies and the availability of light sources. The goal of this study was to determine optimal excitation wavelengths for in vivo detection of cervical neoplasia. Fluorescence excitation-emission matrices (EEMs) w...... hiện toàn bộ
#Neoplasms #In vivo #Fluorescence #Sensitivity and specificity #Lesions #Spectroscopy #In vitro #Light sources #Wavelength measurement #Data analysis
A large-scale simulation of the piriform cortex by a cell automaton-based network model
IEEE Transactions on Biomedical Engineering - Tập 49 Số 9 - Trang 921-935 - 2002
An event-driven framework is used to construct a physiologically motivated large-scale model of the piriform cortex containing in the order of 10/sup 5/ neuron-like computing units. This approach is based on a hierarchically defined highly abstract neuron model consisting of finite-state machines. It provides computational efficiency while incorporating components which have identifiable counterpa...... hiện toàn bộ
#Brain modeling #Large-scale systems #Neurons #Computational modeling #Computational efficiency #Electroencephalography #Biological system modeling #Aggregates #Artificial neural networks #Automata
Signal strength versus cuff length in nerve cuff electrode recordings
IEEE Transactions on Biomedical Engineering - Tập 49 Số 9 - Trang 1045-1050 - 2002
When a nerve cuff electrode is used for the recording of signals from peripheral nerves, cuff dimensions have to be chosen. Traditionally, the peak-to-peak amplitude of the single-fiber action potential (SFAP) is optimized through the choice of cuff diameter and cuff length. In this paper, the dependency of the root-mean-square (RMS) value of the nerve signal on the cuff dimensions was studied and...... hiện toàn bộ
#Noise level #Extracellular #Noise reduction #Biomedical electrodes #Conductors #Petroleum #Animals #Humans #Neurofeedback
An inverse design of an open, head/neck RF coil for MRI
IEEE Transactions on Biomedical Engineering - Tập 49 Số 9 - Trang 1024-1030 - 2002
Radio-frequency (RF) coils are a necessary component of magnetic resonance imaging (MRI) systems. When used in transmit operation, they act to generate a homogeneous RF magnetic field within a volume of interest and when in receive operation, they act to receive the nuclear magnetic resonance signal from the RF-excited specimen. This paper outlines a procedure for the design of open RF coils using...... hiện toàn bộ
#Neck #Radio frequency #Coils #Magnetic resonance imaging #Magnetic heads #Nuclear power generation #Magnetic fields #Signal generators #Nuclear magnetic resonance #RF signals
Detection of ECG characteristic points using wavelet transforms
IEEE Transactions on Biomedical Engineering - Tập 42 Số 1 - Trang 21-28 - 1995
Noninvasive myocardial activation time imaging: a novel inverse algorithm applied to clinical ECG mapping data
IEEE Transactions on Biomedical Engineering - Tập 49 Số 10 - Trang 1153-1161 - 2002
Linear approaches like the minimum-norm least-square algorithm show insufficient performance when it comes to estimating the activation time map on the surface of the heart from electrocardiographic (ECG) mapping data. Additional regularization has to be considered leading to a nonlinear problem formulation. The Gauss-Newton approach is one of the standard mathematical tools capable of solving thi...... hiện toàn bộ
#Myocardium #Electrocardiography #Newton method #Least squares methods #Recursive estimation #Iterative algorithms #Heart #Computational modeling #Rhythm #Catheters
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