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 results can describe the structure of the current flow fairly well. By increasing the number of measurements, the estimate can be made more localised. The current distributions may be also used as an interpolation and an extrapolation for the measured field patterns.
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Hämäläinen MS,Ilmoniemi RJdoi
10.1007/BF02512476subject
Has Abstractpub_date
1994-01-01 00:00:00pages
35-42issue
1eissn
0140-0118issn
1741-0444journal_volume
32pub_type
杂志文章abstract：:The aim of the study was to investigate the effect of signal length on the performance of a signal source separation method, independent component analysis (ICA), when extracting the visual evoked potential (EP) lambda wave from saccade-related electro-encephalogram (EEG) waveforms. A method was devised that enabled t...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02348134
更新日期：2002-03-01 00:00:00
abstract：:Osteoporosis is one of the most common diseases that leads to bone fractures. Dual-energy X-ray absorptiometry is currently employed to measure the bone mineral density and to diagnose osteoporosis. Alternatively, the dielectric properties of bones are found to be influenced by bone mineral density; hence, dielectric ...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章,评审
doi：10.1007/s11517-018-1887-z
更新日期：2019-01-01 00:00:00
abstract：:Single-ventricle anomaly is a hereditary heart disease that is characterized by anatomical malformations. The main consequence of this malformation is desaturated blood flow, which without proper treatment increases the risk of death. The classical treatment is based on a three-stage palliative procedure which should ...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-016-1499-4
更新日期：2017-02-01 00:00:00
abstract：:Monitoring upper-limb activity in a free-living environment is important for the evaluation of rehabilitation. This study is a validation of the Strathclyde Upper-Limb Activity Monitor (SULAM) which records the vertical movement and position of each wrist, and assesses bimanual movement. Agreement between the SULAM an...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-007-0233-7
更新日期：2007-10-01 00:00:00
abstract：:The purpose of this study is to investigate the feasibility and performance of a stationary, non-focused dual-sectored tubular transurethral ultrasound applicator for thermal exposure of tissue regions adjacent to the urethra for treatment of stress urinary incontinence (SUI) through acoustic and biothermal simulation...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-020-02152-6
更新日期：2020-06-01 00:00:00
abstract：:Selective laser sintering (SLS) is a solid freeform fabrication technique, developed by Carl Deckard for his master's thesis at the University of Texas, patented in 1989. SLS manufacturing is a technique that produces physical models through a selective solidification of a variety of fine powders. SLS technology is ge...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章,评审
doi：10.1007/s11517-012-1001-x
更新日期：2013-03-01 00:00:00
abstract：:In electrocardiographic imaging (ECGI), one solves the inverse problem of electrocardiography (ECG) to reconstruct equivalent cardiac sources based on the body surface potential measurements and a mathematical model of the torso. Due to attenuation and spatial smoothing within the torso, this inverse problem is ill-po...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-019-02018-6
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abstract：:Self-generated mobility is a major contributor to the physical, emotional, cognitive, and social development of infants and toddlers. When young children have disorders that hinder self locomotion, their development is at risk for delay. Independent mobility via traditional power mobility devices may prevent this dela...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-011-0820-5
更新日期：2011-10-01 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
pub_type： 杂志文章
doi：10.1007/BF02344807
更新日期：2001-03-01 00:00:00
abstract：:Proper alignment of acetabular implantation is necessary for good patient outcomes and preventing complications or additional surgeries in total hip arthroplasty (THA). Rotation of the pelvis in lateral decubitus (LD) is typically not accounted for as surgeons use the surgery table as a reference plane to align implan...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-020-02235-4
更新日期：2020-10-01 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
pub_type： 杂志文章
doi：10.1007/s11517-018-1842-z
更新日期：2018-11-01 00:00:00
abstract：:Artifacts cause distortion and fuzziness in electroencephalographic (EEG) signal and hamper EEG analysis, so it is necessary to remove them prior to the analysis. Particularly, artifact removal becomes a critical issue in experimental protocols with significant inherent recording noise, such as mobile EEG recordings a...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-017-1620-3
更新日期：2017-09-01 00:00:00
abstract：:Left ventricular volume calibration based on the conductance catheter depends on the correct determination of the parallel conductance (Gp). Baan's saline manoeuvre procedure leads to Gp by finding the end-systolic (Ges) and end-diastolic (Ged) conductances, for each beat of the dilution curve rising limb. After plott...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02513284
更新日期：1999-03-01 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
pub_type： 杂志文章
doi：10.1007/s11517-016-1458-0
更新日期：2016-11-01 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
pub_type： 杂志文章
doi：10.1007/BF02513315
更新日期：1999-05-01 00:00:00
abstract：:An eye pointer was developed as a new line-of-sight displacement analyser. It analyses an observer's eye movements and superimposes their line of vision on a TV image which is the same as their view. A newly developed miniature colour field camera and very compact eye-movement sensors are attached to a translucent rei...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02446149
更新日期：1990-07-01 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
pub_type： 杂志文章
doi：10.1007/s11517-010-0653-7
更新日期：2010-11-01 00:00:00
abstract：:This article presents a stimulation control method using a uniaxial gyroscope measuring angular velocity of the shank in the sagittal plane, to control functional electrical stimulation of the triceps surae to improve push-off of stroke subjects during gait. The algorithm is triggered during each swing phase of gait w...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-009-0539-8
更新日期：2009-11-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02510962
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-011-0827-y
更新日期：2011-11-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02351041
更新日期：2005-09-01 00:00:00
abstract：:In three-dimensional reconstruction of the human spine obtained from stereo-radiographic set-ups (two radiographs or more), it is extremely difficult to identify exactly the same landmarks on all radiographs. The effect of these identification errors was investigated with simulations made on points of known three-dime...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02446787
更新日期：1992-11-01 00:00:00
abstract：:Atrial fibrillation (AF) is the most common cardiac arrhythmia with episodes that may terminate spontaneously in the first stages of the disease. On the other hand, when the arrhythmia is not self-terminating, normal sinus rhythm (NSR) restoration use to be required to reduce the risk of stroke and improve cardiac out...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-008-0348-5
更新日期：2008-07-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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更新日期：2020-02-01 00:00:00
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02447101
更新日期：1991-03-01 00:00:00
abstract：:Segmentation and classification of low-quality and noisy ultrasound images is challenging task. In this paper, a new approach is proposed for robust segmentation and classification of carotid artery ultrasound images and consequently, detecting cerebrovascular disease. The proposed technique consists of two phases, in...
journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-007-0189-7
更新日期：2007-06-01 00:00:00
abstract：:Generation of a large number of cells belonging to the cardiac pacemaker system would constitute an important step towards their utilization as a biological cardiac pacemaker system. The aim of the present study was to identify factors, which might induce transformation of a heterogenous population of fetal cardiomyoc...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-007-0164-3
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