Effect of radiographic landmark identification errors on the accuracy of three-dimensional reconstruction of the human spine.

abstract：:To elucidate the mechanisms of localisation of intimal hyperplasia in anastomosed arteries, the effects of flow disturbances on the transport of low-density lipoproteins (LDLs) from the flowing blood to the wall of end-to-end anastomosed arteries, with and without a moderate stenosis, were studied theoretically by mea...

journal_title：Medical & biological engineering & computing

authors： Wada S,Koujiya M,Karino T

更新日期：2002-09-01 00:00:00

abstract：:In this study, we present finite element analysis models to calculate the increase in intrathoracic volume of pectus excavatum patients after the Nuss procedure. One virtue of our approach is that the measurement of the intrathoracic volume has no time difference and is not affected by postoperative pain, which cannot...

journal_title：Medical & biological engineering & computing

authors： Chang PY,Hsu ZY,Lai JY,Wang CJ,Ching YT

更新日期：2010-02-01 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

authors： Farina D,Muhammad W,Fortunato E,Meste O,Merletti R,Rix H

更新日期：2001-03-01 00:00:00

abstract：:Increasing costs in healthcare have stimulated discussions on whether installation of competent in-house service groups for equipment management could eventually aid in reducing expenditure. In the Federal Republic of Germany, a four-year programme was initiated in 1979 with the purpose of investigating the feasibilit...

journal_title：Medical & biological engineering & computing

authors： Irnich W

更新日期：1989-01-01 00:00:00

abstract：:In this study, we introduce a novel simulation technique to incorporate delineation errors into radiotherapy treatment margins and combine them with organ motion and set-up errors to investigate the cumulative dosimetric effects in different tumour sites. The effects of applying patient realignment correction protocol...

journal_title：Medical & biological engineering & computing

authors： Mzenda B,Hosseini-Ashrafi M,Palmer A,Liu H,Brown DJ

更新日期：2010-07-01 00:00:00

abstract：:An algorithm for determining the frequency and propagation time of the gastric slow wave has been designed for integration into a demand gastric pacing system. The algorithm analyses the serosal activity in both the time and frequency domains, and the results are compared to produce a conclusion only when the values a...

journal_title：Medical & biological engineering & computing

authors： Gray MB,Williams RD,Chen JD

更新日期：2000-01-01 00:00:00

abstract：:Aortic stiffness measurement is well recognized as an independent predictor of cardiovascular mortality and morbidity. Recently, a simple method has been proposed for the evaluation of the local aortic stiffness (AoStiff) using a non-invasive bioelectrical impedance (BI) technique. This approach relies on a novel inte...

journal_title：Medical & biological engineering & computing

authors： Collette M,Lalande A,Willoteaux S,Leftheriotis G,Humeau A

更新日期：2011-04-01 00:00:00

abstract：:Fitting the measured bioimpedance spectroscopy (BIS) data to the Cole model and then extracting the Cole parameters is a common practice in BIS applications. The extracted Cole parameters then can be analysed as descriptors of tissue electrical properties. To have a better evaluation of physiological or pathological p...

journal_title：Medical & biological engineering & computing

authors： Gholami-Boroujeny S,Bolic M

更新日期：2016-04-01 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：: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：: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

authors： Jo S

更新日期：2008-02-01 00:00:00

abstract：:The problem of excess cerebrospinal fluid in the brain (hydrocephalus) is generally managed using a passive pressure or flow regulated mechanical shunt. Despite the success of such devices, they have been plagued with a number of problems. It is desirable to have a shunt valve that responds dynamically to the changing...

journal_title：Medical & biological engineering & computing

authors： Momani L,Al-Nuaimy W,Al-Jumaily M,Mallucci C

更新日期：2011-01-01 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

authors： Potse M,Dubé B,Vinet A

更新日期：2009-07-01 00:00:00

abstract：:Vertebral fractures are common in children with osteogenesis imperfecta (OI). Current imaging methods for fracture detection (X-ray and DXA) use ionising radiation. This pilot study explored whether the alteration in blood flow in vertebral fractures results in skin temperature changes that may be detected using high ...

journal_title：Medical & biological engineering & computing

authors： Fane De Salis A,Saatchi R,Dimitri P

更新日期：2018-09-01 00:00:00

abstract：:While matrix remodeling plays a key role in vascular physiology and pathology, the underlying mechanisms have remained incompletely understood. We studied the remodeling of collagen matrices by individual vascular smooth muscle cells (SMCs), clusters and monolayers. In addition, we focused on the contribution of trans...

journal_title：Medical & biological engineering & computing

authors： van den Akker J,Tuna BG,Pistea A,Sleutel AJ,Bakker EN,van Bavel E

更新日期：2012-07-01 00:00:00

abstract：:Cerebral autoregulation controls cerebral blood flow under changing cerebral perfusion pressure. Standards for measurement and analysis of dynamic cerebral autoregulation (dCA) are lacking. In this study, dCA reproducibility, quantified by intraclass correlation coefficient, is evaluated for different methodological a...

journal_title：Medical & biological engineering & computing

authors： Gommer ED,Shijaku E,Mess WH,Reulen JP

更新日期：2010-12-01 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

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

authors： Song J,Joshi RP,Schoenbach KH

更新日期：2011-06-01 00:00:00

abstract：:The heart rate variability (HRV) is an indicator of the subject homeostasis alterations. For a healthy individual, the HRV shows a nonlinear behavior, thus requiring a nonlinear approach to provide additional information about HRV dynamics. In this work, the nonlinear techniques, central tendency measure (CTM) and sec...

journal_title：Medical & biological engineering & computing

authors： dos Santos L,Barroso JJ,Macau EE,de Godoy MF

更新日期：2015-11-01 00:00:00

abstract：:The aim of this study was to evaluate feasibility and reproducibility of quantitative assessment of colonic morphology on CT colonography (CTC). CTC datasets from 60 patients with optimal colonic distension were assessed using prototype software. Metrics potentially associated with poor endoscopic performance were cal...

journal_title：Medical & biological engineering & computing

authors： Weber CN,Lev-Toaff AS,Levine MS,Sudarsky S,Guendel L,Geiger B,Zafar HM

更新日期：2017-03-01 00:00:00

abstract：:Based on the principle of backscattering of laser radiation from tissues, a non-invasive PC-AT based reflectance imaging technique is developed. The laser beam from a semiconductor laser operating at 670 nm is guided to the tissue site by an optical fibre. The backscattered radiation is collected by another fibre plac...

journal_title：Medical & biological engineering & computing

authors： Shanthi S,Singh M

更新日期：1997-05-01 00:00:00

abstract：:The management of postprandial glucose excursions in type 1 diabetes has a major impact on overall glycaemic control. In this work, we propose and evaluate various mechanistic models to characterize the disposal of meal-attributable glucose. Sixteen young volunteers with type 1 diabetes were subject to a variable-targ...

journal_title：Medical & biological engineering & computing

authors： García-García F,Hovorka R,Wilinska ME,Elleri D,Hernando ME

更新日期：2017-02-01 00:00:00

abstract：:To make picture archiving and communication systems (PACS) a practical reality for small-scale structures, it appears necessary to build a network that integrates and optimises production management, analysis and storage of images, and to include the ability to communicate with other similar remote structures. To solv...

journal_title：Medical & biological engineering & computing

authors： Duchêne J,Lerallut JF,Gong N,Kanz R

更新日期：1993-05-01 00:00:00

abstract：:From adult data, it is known that numerous factors, such as age, state of the autonomic nervous system, diurnal rhythms or mean R-R interval mRR, influence heart rate variability (HRV). The aim of this study was the examination of the influence of gestational age, mRR, gender and time of day on fetal HRV. The analysis...

journal_title：Medical & biological engineering & computing

authors： Lange S,Van Leeuwen P,Geue D,Hatzmann W,Grönemeyer D

更新日期：2005-07-01 00:00:00

abstract：:The fast hybrid operator splitting (HOS) and stable uniformization (UNI) methods have been proposed to save computation cost and enhance stability for Markov chain model in cardiac cell simulations. Moreover, Chen-Chen-Luo's quadratic adaptive algorithm (CCL) combined with HOS or UNI was used to improve the tradeoff b...

journal_title：Medical & biological engineering & computing

authors： Chen XJ,Luo CH,Chen MH

更新日期：2020-09-01 00:00:00

abstract：:In a previous paper we demonstrated that the linear portion of the pressure-velocity loop (PU-loop) corresponding to early systole could be used to calculate the local wave speed. In this paper we extend this work to show that determination of the time at which the PU-loop first deviates from linearity provides a conv...

journal_title：Medical & biological engineering & computing

authors： Khir AW,Swalen MJ,Feng J,Parker KH

更新日期：2007-12-01 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：:Musculoskeletal models have been developed to estimate internal loading on the human skeleton, which cannot directly be measured in vivo, from external measurements like kinematics and external forces. Such models of the shoulder and upper extremity have been used for a variety of purposes, ranging from understanding ...

journal_title：Medical & biological engineering & computing

authors： Bolsterlee B,Veeger DH,Chadwick EK

更新日期：2013-09-01 00:00:00

abstract：:The successful decoding of kinematic variables from spike trains of motor cortical neurons is essential for cortical neural prosthesis. Spike trains from each single unit must be extracted from extracellular neural signals and, thus, spike detection and sorting procedure is indispensable but the detection and sorting ...

journal_title：Medical & biological engineering & computing

authors： Kim KH,Kim SS,Kim SJ

更新日期：2006-03-01 00:00:00

abstract：:Nowadays, acoustic emission (AE) has its applications in various areas, including mechanical, civil, underwater acoustics, and biomedical engineering. It is a non-destructive evaluation (NDE) and a non-intrusive method to detect active damage mechanisms such as crack growth, delamination, and processes such as frictio...

journal_title：Medical & biological engineering & computing

authors： Remya AR,Vishwash B,Lee C,Pai PS,Espinoza Oras AA,Ozevin D,Mathew MT

更新日期：2020-08-01 00:00:00