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-shaped coils were modeled using three different coil orientations: transverse, parallel, and orthogonal. The orthogonal orientation of a vortex coil and parallel orientation of a cage-shaped coil showed higher inflow, vorticity, and wall shear stress in the dome region, which provide an unfavorable hemodynamic environment for thromboembolization. Thicker coils also produced unfavorable hemodynamic conditions compared to normal coils having the same shape, orientation, and total coil volume. Though the effects of coil shape and orientation on the hemodynamic parameters of interest were not consistent, the open area at the distal half of the mid-transverse plane of an aneurysm showed significant positive correlation with flow into the dome region and mean vorticity in the dome region. Therefore, blocking the distal mid-transverse plane of an aneurysm using coils would effectively reduce the intra-aneurysmal flow activity and provide a more efficient hemodynamic environment for thromboembolization.
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Jeong W,Han MH,Rhee Kdoi
10.1007/s11517-013-1073-2subject
Has Abstractpub_date
2013-09-01 00:00:00pages
981-90issue
9eissn
0140-0118issn
1741-0444journal_volume
51pub_type
杂志文章abstract：:During scoliosis instrumentation surgery, it is difficult for surgeons fully to track vertebral motion in 3D, because only the posterior elements of the spine are exposed. Different intra-operative modelling approaches are evaluated using a registration technique that matches intra-operative measurements with a 3D pre...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02513328
更新日期：1999-07-01 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：:The boundary-element method (BEM) is widely used for electrocardiogram (ECG) simulation. Its major disadvantage is its perceived inability to deal with the anisotropic electric conductivity of the myocardial interstitium, which led researchers to represent only intracellular anisotropy or neglect anisotropy altogether...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-009-0472-x
更新日期：2009-07-01 00:00:00
abstract：:Classification of cancerous genes from microarray data is an important research area in bioinformatics. Large amount of microarray data are available, but it is very costly to label them. This paper proposes an active learning model, a semi-supervised classification approach, to label the microarray data using which p...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-020-02238-1
更新日期：2020-10-01 00:00:00
abstract：:Peripheral arterial occlusive disease is a serious cardiovascular disorder. The arterial occlusion leads to turbulent flow and arterial sound generation on the inner vessel wall. Stenosis-induced vibro-acoustic waves propagate through the surrounding soft tissues and reach the skin surface. In this study, the feasibil...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-019-01995-y
更新日期：2019-08-01 00:00:00
abstract：:Variations in the amplitude and period of essential and Parkinsonian tremors were studied. It was found that the variations in frequency (or period) were mostly similar to the white noise, with the standard deviation typically less than 10% of the mean, whereas the variations in amplitude were much larger, with standa...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02344710
更新日期：2004-05-01 00:00:00
abstract：:Loop-mediated isothermal amplification or LAMP has been identified to be an efficient technology for point-of-care diagnostics. Paper-based LAMP technique has tremendous potential in replacing the existing tube-based technology as the manufacturing cost of a paper-based device is comparatively lower and easy-to-use. L...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-019-02082-y
更新日期：2020-02-01 00:00:00
abstract：:Magnetic nanoparticles for therapy and diagnosis are at the leading edge of the rapidly developing field of bionanotechnology. In this study, we have theoretically studied motion of magnetic nano- as well as micro-particles in the field of cylindrical Halbach array of permanent magnets. Magnetic flux density was model...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-010-0636-8
更新日期：2010-08-01 00:00:00
abstract：:It is clinically well-established that minimally invasive subcutaneous continuous glucose monitoring (CGM) sensors can significantly improve diabetes treatment. However, CGM readings are still not as reliable as those provided by standard fingerprick blood glucose (BG) meters. In addition to unavoidable random measure...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-014-1226-y
更新日期：2015-12-01 00:00:00
abstract：:A method is presented for automatic analysis of the P-wave, based on lead II of a 12-lead standard ECG, in resting conditions during a routine examination for the detection of patients prone to atrial fibrillation (AF), one of the most prevalent arrhythmias. First, the P-wave was delineated, and this was achieved in t...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02347697
更新日期：2002-01-01 00:00:00
abstract：:OKAS-3D is a further development of the single floating circle target tracker. This tracker consists of a cathode ray tube display, a lens in front of the display and a circular light-sensitive photocell placed in the image field of the lens. A small circular trace generated on the screen is focused around the photoce...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02510786
更新日期：1995-09-01 00:00:00
abstract：:Instrumentation to measure accurately the stresses at the interface of a residual limb and prosthetic socket has a strong potential for use in prosthetic treatment. As a tool in the clinical setting, the device would allow a clinician to identify sites of excessive loading, information which could then be combined wit...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章,评审
doi：10.1007/BF02522507
更新日期：1995-07-01 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
pub_type： 杂志文章
doi：10.1007/s11517-017-1726-7
更新日期：2018-05-01 00:00:00
abstract：:The main constituent of an ultrasound contrast agent (UCA) is gas-filled microbubbles. An average UCA contains billions per ml. These microbubbles are excellent ultrasound scatterers due to their high compressibility. In an ultrasound field they act as resonant systems, resulting in harmonic energy in the backscattere...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-009-0497-1
更新日期：2009-08-01 00:00:00
abstract：:In acute experiments the sciatic nerve of the rat is electrically stimulated to induce fatigue in the medial Gastrocnemius muscle. Fatigue tests are carried out using intermittent stimulation of different compartments (sequential) or a single compartment (synchronous) of the sciatic nerve. The activation of different ...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02530036
更新日期：1997-05-01 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
pub_type： 杂志文章
doi：10.1007/s11517-012-0972-y
更新日期：2013-02-01 00:00:00
abstract：:Full-night polysomnography (PSG) has been recognized as the gold standard test for sleep apnea-hypopnea syndrome (SAHS). However, PSG examinees are physically restrained for the full night by many contact sensors and obtrusive connecting cables, inducing mental stress. We developed a non-contact SAHS diagnostic system...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-015-1370-z
更新日期：2016-05-01 00:00:00
abstract：:Visual inspection of foetal heart rate (FHR) sequences is an important means of foetal well-being evaluation. The application of fractal features for classifying physiologically relevant FHR sequence patterns is reported. The use of fractal features is motivated by the difficulties exhibited by traditional classificat...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02510743
更新日期：1998-03-01 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
pub_type： 杂志文章
doi：10.1007/BF02518911
更新日期：1994-03-01 00:00:00
abstract：:Recent studies were investigated that report spontaneous oscillations of cerebral perfusion in the very low-frequency range (0.01-0.04 Hz), emphasising details of spectral estimation. The effects of different spectral estimation procedures were compared, using simulated and clinical data. It was shown that data detren...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02343541
更新日期：2003-01-01 00:00:00
abstract：:The objective of the present work was to develop automated methods for the compressed tracheal breathing sound analysis. Overnight tracheal breathing sound was recorded from ten apnoea patients. From each patient, three different types of tracheal sound deflection pattern, each of 10 min duration, were visually scored...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-008-0317-z
更新日期：2008-04-01 00:00:00
abstract：:A process is described for the fabrication of silicon-based microelectrodes for neurophysiology using bonded and etched-back silicon-on-insulator (BESOI) wafers. The probe shapes are defined without high levels of boron doping in the silicon; this is considered as a step towards producing probes with active electronic...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02344773
更新日期：2000-03-01 00:00:00
abstract：:The accelerometer is used for mechanomyogram (MMG) recordings of muscle contractions. Although the mechanical characteristics of other MMG transducers have been determined with reference to the accelerometer, mechanical aspects of the accelerometer itself, including the weight of the transducer, have not been verified...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02344888
更新日期：2003-03-01 00:00:00
abstract：:Density assessment and lesion localization in breast MRI require accurate segmentation of breast tissues. A fast, computerized algorithm for volumetric breast segmentation, suitable for multi-centre data, has been developed, employing 3D bias-corrected fuzzy c-means clustering and morphological operations. The full br...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-016-1484-y
更新日期：2017-01-01 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
pub_type： 杂志文章
doi：10.1007/BF02351018
更新日期：2004-01-01 00:00:00
abstract：:Several 3D reconstruction techniques deriving from stereoradiographic DLT have been presented during the last 15 years, but these techniques have usually been limited in accuracy because of the small number of corresponding anatomical landmarks identified on both radiographs. A new technique has recently been proposed...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02344797
更新日期：2001-03-01 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
pub_type： 杂志文章
doi：10.1007/s11517-019-01977-0
更新日期：2019-07-01 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：:A hypothetical neuromusculoskeletal model is developed to simulate human normal walking and its modulated behaviors. A small set of neural periodic patterns drive spinal muscle synergies which in turn lead to specific pattern of muscle activation and supraspinal feedback systems maintain postural balance during walkin...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-007-0277-8
更新日期：2008-02-01 00:00:00
abstract：:Results of self-consistent analyses of cells show the possibility of temperature increases at membranes in response to a single nanosecond, high-voltage pulse, at least over small sections of the membrane. Molecular Dynamics simulations indicate that such a temperature increase could facilitate poration, which is one ...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-011-0745-z
更新日期：2011-06-01 00:00:00
