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Iglesias K K Institute of Social and Preventive Medicine, Lausanne University Hospital, Route de la Corniche 10, Lausanne CH-1010, - - 2014
/st>To better understand the structure of the Patient Assessment of Chronic Illness Care (PACIC) instrument. More specifically to test all published validation models, using one single data set and appropriate statistical tools. /st>Validation study using data from cross-sectional survey. /st>A population-based sample of non-institutionalized adults with diabetes residing in Switzerland ...
Guo Yi - - 2014
A novel approach is presented to automatically segment the left ventricle in fetal echocardiograms. The proposed approach strategically integrates sparse representation, global constraint, and local refinement algorithms into an active appearance model (AAM) framework. In the training stage, we construct an enhanced AAM texture model to deal with the speckle ...
Lee Hyunna - - 2014
In this paper, we propose a fast three-material modeling for electronic cleansing (EC) in computed tomographic colonography. Using a triple arch projection, our three-material modeling provides a very quick estimate of the three-material fractions to remove ridge-shaped artifacts at the T-junctions where air, soft-tissue (ST), and tagged residues (TRs) meet ...
Sousa Clara C REQUIMTE, Microbiology Laboratory, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, R. Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal. Electronic address: - - 2014
In this work we developed and validated a FTIR-ATR (Fourier transform infrared spectroscopy with attenuated total reflectance) based model for typing Acinetobacter baumannii clinical isolates belonging to ST98, ST208 and ST218 included into the worldwide spread clonal complex (CC) 92 and ST103. FTIR-ATR spectra of seventy-seven previously characterized isolates (Multi ...
Warner Joshua D JD Mayo Clinic Department of Biomedical Engineering, Mayo Graduate School, Mayo Medical School and the Mayo Clinic Medical Scientist Training Program, 200 First Street SW, Rochester, MN, 55905, USA, - - 2014
Stereology is a volume estimation method, typically applied to diagnostic imaging examinations in population studies where planimetry is too time-consuming (Chapman et al. Kidney Int 64:1035-1045, 2003), to obtain quantitative measurements (Nyengaard J Am Soc Nephrol 10:1100-1123, 1999, Michel and Cruz-Orive J Microsc 150:117-136, 1988) of certain structures or organs. ...
Jeong Jong Cheol JC Department of Molecular Biosciences and Center for Bioinformatics, The University of Kansas, Lawrence, Kansas, - - 2014
Molecular dynamics (MD) simulation has become one of the key tools to obtain deeper insights into biological systems using various levels of descriptions such as all-atom, united-atom, and coarse-grained models. Recent advances in computing resources and MD programs have significantly accelerated the simulation time and thus increased the amount of ...
Cleynen Alice - - 2014
Change point problems arise in many genomic analyses such as the detection of copy number variations or the detection of transcribed regions. The expanding Next Generation Sequencing technologies now allow to locate change points at the nucleotide resolution. Because of its complexity which is almost linear in the sequence length ...
Zeng Qiang Q Urban Transport Research Center School of Traffic and Transportation Engineering Central South University, Changsha, Hunan 410075, PR China. Electronic address: - - 2014
This study proposes a Bayesian spatial joint model of crash prediction including both road segments and intersections located in an urban road network, through which the spatial correlations between heterogeneous types of entities could be considered. A road network in Hillsborough, Florida, with crash, road, and traffic characteristics data for ...
Rouhani H H Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Movement Analysis and Measurement, ELH 137/ Station 11, CH-1015 Lausanne, Switzerland. Electronic address: - - 2014
This study aims to design a wearable system for kinetics measurement of multi-segment foot joints in long-distance walking and to investigate its suitability for clinical evaluations. The wearable system consisted of inertial sensors (3D gyroscopes and 3D accelerometers) on toes, forefoot, hindfoot, and shank, and a plantar pressure insole. After ...
Parisot Sarah S Biomedical Image Analysis Group, Department of Computing, Imperial College London, UK. Electronic address: - - 2014
In this paper, we present a graph-based concurrent brain tumor segmentation and atlas to diseased patient registration framework. Both segmentation and registration problems are modeled using a unified pairwise discrete Markov Random Field model on a sparse grid superimposed to the image domain. Segmentation is addressed based on pattern classification ...
Wollgarten Markus M Helmholtz Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany. Electronic address: - - 2014
A Bayesian approach to reconstruction and segmentation of tomographic data is outlined and further detailed for the case of absorption tomography. The algorithm allows the quantification of reconstruction errors and segmentation confidence. Calculation results for various experimental settings (number of projections, incident dose, different materials) are shown and discussed.
Slakey Douglas P DP Department of Surgery, Tulane University School of Medicine, 1430 Tulane Avenue, SL22, New Orleans, LA 70112, - - 2014
/st>The purpose of this study was to develop and test a simulation method of conducting investigation of the causality of adverse surgical outcomes. /st>Six hundred and thirty-one closed claims of a major medical malpractice insurance company were reviewed. Each case had undergone conventional root cause analysis (RCA). Claims were categorized ...
Sicsic Jonathan J CERMES3, UMR8211, Inserm U988, Site CNRS, 7, rue Guy Moquet, Villejuif Cedex 94801, - - 2014
/st>Pay-for-performance programmes have been widely implemented in primary care, but few studies have investigated their potential adverse effects on the intrinsic motivation of general practitioners (GPs) even though intrinsic motivation may be a key determinant of quality in health care. Our aim was to compare methods for developing a composite ...
Galinsky Vitaly L VL Center for Scientific Computation in Imaging, University of California at San Diego, La Jolla, CA 92093-0854, USA; Electrical and Computer Engineering Department, University of California at San Diego, La Jolla, CA 92093-0407, USA. Electronic address: - - 2014
Characterization of complex shapes embedded within volumetric data is an important step in a wide range of applications. Standard approaches to this problem employ surface based methods that require inefficient, time consuming, and error prone steps of surface segmentation and inflation to satisfy the uniqueness or stability of subsequent surface ...
Vardhanabhuti Saran S Harvard School of Public Health, 651 Huntington Avenue, Boston, MA 02115, - - 2014
Copy number variants (CNVs) constitute an important class of genetic variants in human genome and are shown to be associated with complex diseases. Whole-genome sequencing provides an unbiased way of identifying all the CNVs that an individual carries. In this paper, we consider parametric modeling of the read depth (RD) ...
Kyaw Thein Aung TA Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie, 514-8507, - - 2014
Various biomechanical investigations have attempted to clarify the aetiology of adjacent segment disease (ASD). However, no biomechanical study has examined in detail the deformation behaviour of the adjacent segments when both pure torque and an angular displacement load are applied to the vertebrae along multiple segments. The purpose of this ...
Dawson S E SE Microbiology and Virology Unit, School of Medicine, University of Manchester, Manchester, - - 2014
In this paper, we demonstrate that Fourier transform infrared (FT-IR) spectroscopy is able to discriminate rapidly between uropathogenic Escherichia coli (UPEC) of key lineages with only relatively simple sample preparation. A total of 95 bacteria from six different epidemiologically important multilocus sequence types (ST10, ST69, ST95, ST73, ST127 and ST131) ...
Selver M Alper MA Department of Electrical and Electronics Engineering, Dokuz Eylül University, İzmir 35160, Turkey. Electronic address: - - 2014
Precise measurements on abdominal organs are vital prior to the important clinical procedures. Such measurements require accurate segmentation of these organs, which is a very challenging task due to countless anatomical variations and technical difficulties. Although, several features with various classifiers have been designed to overcome these challenges, abdominal organ ...
Ringenberg Jordan J EECS Department, College of Engineering, University of Toledo, 2801 W. Bancroft Street, Toledo, OH 43606, United States. Electronic address: - - 2014
This paper presents a fully automatic method to segment the right ventricle (RV) from short-axis cardiac MRI. A combination of a novel window-constrained accumulator thresholding technique, binary difference of Gaussian (DoG) filters, optimal thresholding, and morphology are utilized to drive the segmentation. A priori segmentation window constraints are incorporated to ...
Chen Kan - - 2014
Pulmonary nodules are potential manifestation of lung cancer. Accurate segmentation of juxta-vascular nodules and ground glass opacity (GGO) nodules is an important and active area of research in medical image processing. At present, the classical active contour models (ACM) for segmentation of pulmonary nodules may cause the problem of boundary ...
Papp Dávid D Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 30 Fruit Street, Boston, Massachusetts - - 2014
Purpose: The authors propose a novel optimization model for volumetric modulated arc therapy (VMAT) planning that directly optimizes deliverable leaf trajectories in the treatment plan optimization problem, and eliminates the need for a separate arc-sequencing step.Methods: In this model, a 360° arc is divided into a given number of arc ...
Loizou Christos - - 2014
The robust border identification of atherosclerotic carotid plaque, the corresponding degree of stenosis of the common carotid artery (CCA), and also the characteristics of the arterial wall, including plaque size, composition, and elasticity, have significant clinical relevance for the assessment of future cardiovascular events. To facilitate the follow-up and analysis ...
Akkari Nesrine N Natural History Museum of Denmark (Zoological Museum), University of Copenhagen, Universitetsparken 15, København Ø DK-2100, Denmark. - - 2014
The mismatch between dorsal and ventral trunk features along the millipede trunk was long a subject of controversy, largely resting on alternative interpretations of segmentation. Most models of arthropod segmentation presuppose a strict sequential antero-posterior specification of trunk segments, whereas alternative models involve the early delineation of a limited number ...
Richtsfeld Andreas A Vienna University of Technology, Automation and Control Institute (ACIN), Gusshausstraße 25-29, 1040 Vienna, - - 2014
Object segmentation of unknown objects with arbitrary shape in cluttered scenes is an ambitious goal in computer vision and became a great impulse with the introduction of cheap and powerful RGB-D sensors. We introduce a framework for segmenting RGB-D images where data is processed in a hierarchical fashion. After pre-clustering ...
Ma Da D Centre for Medical Imaging Computing, University College London, London, England, United Kingdom ; Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, England, United - - 2014
Multi-atlas segmentation propagation has evolved quickly in recent years, becoming a state-of-the-art methodology for automatic parcellation of structural images. However, few studies have applied these methods to preclinical research. In this study, we present a fully automatic framework for mouse brain MRI structural parcellation using multi-atlas segmentation propagation. The framework ...
Hunsaker Michael R MR Department of Psychiatry and Behavioral Sciences, University of California, Davis Medical Center, Davis, California, United States of America ; UC Davis MIND Institute; University of California, Davis Medical Center, Davis, California, United States of - - 2014
This report outlines a neuroimaging pipeline that allows a robust, high-throughput, semi-automated, template-based protocol for segmenting the hippocampus in rhesus macaque (Macaca mulatta) monkeys ranging from 1 week to 260 weeks of age. The semiautomated component of this approach minimizes user effort while concurrently maximizing the benefit of human expertise ...
Bersch Sebastian D SD School of Engineering, University of Portsmouth, Anglesea Building, Anglesea Road, Portsmouth PO1 3DJ, UK. - - 2014
It is known that parameter selection for data sampling frequency and segmentation techniques (including different methods and window sizes) has an impact on the classification accuracy. For Ambient Assisted Living (AAL), no clear information to select these parameters exists, hence a wide variety and inconsistency across today's literature is observed. ...
Del-Blanco Carlos R CR Grupo de Tratamiento de Imágenes, E.T.S.I de Telecomunicación, Universidad Politécnica de Madrid, Avenida Complutense 30, Madrid 28040, Spain. - - 2014
Low-cost systems that can obtain a high-quality foreground segmentation almostindependently of the existing illumination conditions for indoor environments are verydesirable, especially for security and surveillance applications. In this paper, a novelforeground segmentation algorithm that uses only a Kinect depth sensor is proposedto satisfy the aforementioned system characteristics. This is achieved ...
Karimi Seemeen S University of California, San Diego, CA, - - 2014
Imaging systems used in aviation security include segmentation algorithms in an automatic threat recognition pipeline. The segmentation algorithms evolve in response to emerging threats and changing performance requirements. Analysis of segmentation algorithms' behavior, including the nature of errors and feature recovery, facilitates their development. However, evaluation methods from the literature ...
Martelli Dario D The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, - - 2014
The aim of this study was to identify the best subset of body segments that provides for a rapid and reliable detection of the transition from steady walking to a slipping event. Fifteen healthy young subjects managed unexpected perturbations during walking. Whole-body 3D kinematics was recorded and a machine learning ...
Huang Lin L Department of Computer Science, Stanford University, Stanford, California, United States of - - 2014
Identity by descent (IBD) inference is the task of computationally detecting genomic segments that are shared between individuals by means of common familial descent. Accurate IBD detection plays an important role in various genomic studies, ranging from mapping disease genes to exploring ancient population histories. The majority of recent work ...
Zhu Xiaofeng X University of North Carolina at Chapel Hill. - - 2014
Direct aperture optimization (DAO) has been used to produce high dosimetric quality intensity-modulated radiotherapy (IMRT) treatment plans with fast treatment delivery by directly modeling the multileaf collimator segment shapes and weights. To improve plan quality and reduce treatment time for our in-house treatment planning system, we implemented a new DAO ...
Jay Chadwick V CV Alaska Science Center, U.S. Geological Survey, Anchorage, Alaska, United States of - - 2014
The Pacific walrus is a large benthivore with an annual range extending across the continental shelves of the Bering and Chukchi Seas. We used a discrete choice model to estimate site selection by adult radio-tagged walruses relative to the availability of the caloric biomass of benthic infauna and sea ice ...
Ye Chuyang C Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, - - 2013
The superior cerebellar peduncles (SCPs) are white matter tracts that serve as the major efferent pathways from the cerebellum to the thalamus. With diffusion tensor images (DTI), tractography algorithms or volumetric segmentation methods have been able to reconstruct part of the SCPs. However, when the fibers cross, the primary eigenvector ...
Deka Lipika L School of Civil and Building Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom. Electronic address: - - 2013
The objective of an accident-mapping algorithm is to snap traffic accidents onto the correct road segments. Assigning accidents onto the correct segments facilitate to robustly carry out some key analyses in accident research including the identification of accident hot-spots, network-level risk mapping and segment-level accident risk modelling. Existing risk mapping ...
Johnson Evan C EC Korey Stringer Institute-Human Performance Laboratory, University of Connecticut, United States. Electronic address: - - 2013
Poor self-regulation of intensity during long distance (Full Iron) triathlon can manifest in adverse discontinuities in performance. Determine if performance and physiological based pacing characteristics over the varied terrain of a triathlon predicted relative bike, run, and/or overall success. Observational study of a random sample of Ironman World Championship athletes. ...
Moniz-Pereira Vera V Universidade de Lisboa, Faculdade de Motricidade Humana, CIPER, LBMF, Lisboa, - - 2013
The purpose of this research was to study the sensitivity of lower limb joint kinematics and kinetics, calculated during different functional tasks (walking, stair descent and stair ascent) in a sample of older adults, to different pose estimation algorithms and models' joint constraints. Three models were developed and optimized differently: ...
Gonçalves Nicolau N Department of Information and Computer Science, Aalto University School of Science, P. O. Box 15400, FI-00076 Aalto, Espoo, - - 2014
The study of brain lesions can benefit from a clear identification of transitions between healthy and pathological tissues, through the analysis of brain imaging data. Current signal processing methods, able to address these issues, often rely on strong prior information. In this article, a new method for tissue segmentation is ...
Rubenstein Lisa - - 2013
/st>Continuous quality improvement (CQI) methods are foundational approaches to improving healthcare delivery. Publications using the term CQI, however, are methodologically heterogeneous, and labels other than CQI are used to signify relevant approaches. Standards for identifying the use of CQI based on its key methodological features could enable more effective learning ...
Liu Xiaobai - - 2013
This work investigates how to automatically parse object trajectories in surveillance videos, which aims at jointly solving three subproblems: 1) spatial segmentation, 2) temporal tracking, and 3) object categorization. We present a novel representation spatiotemporal graph (ST-Graph) in which: 1) Graph nodes express the motion primitives, each representing a short ...
Blay Jean-Yves - - 2013
Soft tissue sarcomas (STS) are a heterogeneous group of cancers comprising over 50 histological subtypes. Current treatment strategies for sarcomas are increasingly adapted to histological and molecular subtype, and several patient- and tumour-related factors influence treatment decision. Seven oncologists specialising in the management of STS, from Europe, the United States ...
Mushtaq Nasir N Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center, 4502 East 41st Street, SAC 1G06, Tulsa, OK 74135, USA. Electronic address: - - 2013
Unlike various research studies conducted to address dependence among smokers, only a few studies have examined smokeless tobacco (ST) dependence. The Fagerström Tolerance Questionnaire (FTQ) and Fagerström Test for Nicotine Dependence (FTND) based scales are the most widely used measures of nicotine dependence for both ST users and smokers. These ...
Weizman Lior - - 2013
Volumetric measurements of plexiform neurofibromas (PNs) are time consuming and error prone, as they require the delineation of the PN boundaries, which is mostly impractical in the daily clinical setup. Accurate volumetric measurements are seldom performed for these tumors mainly due to their great dispersion, size and multiple locations. This ...
Voigt Christian C - - 2013
Bats are important ecosystem service providers, and therefore most relevant for both lowland and highland habitats, particularly in the tropics. Yet, it is poorly understood to what extent they perform large-scale movements, especially movements along mountain slopes. Here, we studied the movement ecology of the potentially migratory species Miniopterus natalensis ...
van Engelen Susanne J P M - - 2013
Degeneration, injury, and surgical interventions may alter the mechanical properties of spinal motion segments, but the quantification of these alterations in vivo is problematic. Manual or instrumented loading of single segments in the intact spine as applied intraoperatively may overestimate the mechanical properties of this segment, because the applied load is ...
Badrinarayanan Vijay - - 2013
We present a novel patch-based probabilistic graphical model for semi-supervised video segmentation. At the heart of our model is a temporal tree structure that links patches in adjacent frames through the video sequence. This permits exact inference of pixel labels without resorting to traditional short time window-based video processing or ...
Jahanbin Arezoo - - 2013
In orthognathic surgery, the surgeon is capable of creating new dimensions to the patient's face. Because a beautiful smile could be related to the divine proportion, the purpose of the current study was to evaluate the changes in the perception of smile after approximating some components of smile to the ...
Ruiz Pujadas Esmeralda - - 2013
We present a novel method to incorporate prior knowledge into normalized cuts. The prior is incorporated into the cost function by maximizing the similarity of the prior to one partition and the dissimilarity to the other. This simple formulation can also be extended to multiple priors to allow the modeling ...
Hao Xiang - - 2013
We present a novel geodesic approach to segmentation of white matter tracts from diffusion tensor imaging (DTI). Compared to deterministic and stochastic tractography, geodesic approaches treat the geometry of the brain white matter as a manifold, often using the inverse tensor field as a Riemannian metric. The white matter pathways ...
Aarnink Saskia H - - 2013
Fiber tractography (FT), which aims to reconstruct the three-dimensional trajectories of white matter (WM) fibers non-invasively, is one of the most popular approaches for analyzing diffusion tensor imaging (DTI) data given its high inter- and intra-rater reliability and scan-rescan reproducibility. The major disadvantage of manual FT segmentations, unfortunately, is that ...
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