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https://www.readbyqxmd.com/read/28227783/tooth-separation-from-dental-model-using-segmentation-field
#1
Hao Wang, Zhongyi Li, Hao Wang, Zhongyi Li, Zhongyi Li, Hao Wang
Tooth segmentation on dental model is an essential step of computer-aided-design systems for orthodontic virtual treatment planning. However, efficiently identifying cutting boundary to separate tooth from dental model still remains a challenge, due to various geometrical shapes of teeth, complex tooth arrangements and varying degrees of crowding problem. Most segmentation approaches presented before are not able to achieve a balance between fine segmentation results and simple operating procedure. In this article, we present a novel and efficient framework that achieves tooth segmentation based on the segmentation field...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227539/robot-assisted-assessment-of-wrist-proprioception-does-wrist-proprioceptive-acuity-follow-weber-s-law
#2
Sara Contu, Francesca Marini, Leonardo Cappello, Lorenzo Masia, Sara Contu, Francesca Marini, Leonardo Cappello, Lorenzo Masia, Lorenzo Masia, Sara Contu, Leonardo Cappello, Francesca Marini
Proprioception is essential for planning and controlling limb posture and movement. In our recent work, we introduced a standardized robot-aided method for measuring proprioceptive discrimination thresholds at the wrist to obtain reliable and accurate measures of proprioceptive acuity. Weber's law defines discrimination thresholds as a constant ratio between the just noticeable difference and the reference or standard stimulus. Reporting Weber's fractions thus provides the possibility of comparing results with the reports of others collected worldwide...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227423/dynamic-mapping-of-ventricular-function-from-cardiovascular-magnetic-resonance-imaging
#3
Maria Panayiotou, Peter Mountney, Alexander Brost, Daniel Toth, Tom Jackson, Jonathan M Behar, Christopher A Rinaldi, R James Housden, Kawal S Rhode, Maria Panayiotou, Peter Mountney, Alexander Brost, Daniel Toth, Tom Jackson, Jonathan M Behar, Christopher A Rinaldi, R James Housden, Kawal S Rhode, Alexander Brost, Tom Jackson, Maria Panayiotou, Christopher A Rinaldi, Jonathan M Behar, R James Housden, Kawal S Rhode, Daniel Toth, Peter Mountney
Heart failure is associated with substantial mortality and morbidity and remains the most common diagnosis in older patients. Based on experimental electrophysiologic studies, cardiac resynchronization therapy (CRT) for heart failure results in a maximum resynchronization effect when applied to the most delayed left ventricular (LV) site. Current clinical practice is to identify the optimal site using separate visualisation of scar and activation information. These must be mentally mapped into 3D, which is challenging and time-consuming for the electrophysiologist...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227351/video-based-depression-detection-using-local-curvelet-binary-patterns-in-pairwise-orthogonal-planes
#4
Anastasia Pampouchidou, Kostas Marias, Manolis Tsiknakis, Panagiotis Simos, Fan Yang, Guillaume Lemaitre, Fabrice Meriaudeau, Anastasia Pampouchidou, Kostas Marias, Manolis Tsiknakis, Panagiotis Simos, Fan Yang, Guillaume Lemaitre, Fabrice Meriaudeau, Fabrice Meriaudeau, Guillaume Lemaitre, Manolis Tsiknakis, Kostas Marias, Anastasia Pampouchidou, Panagiotis Simos, Fan Yang
Depression is an increasingly prevalent mood disorder. This is the reason why the field of computer-based depression assessment has been gaining the attention of the research community during the past couple of years. The present work proposes two algorithms for depression detection, one Frame-based and the second Video-based, both employing Curvelet transform and Local Binary Patterns. The main advantage of these methods is that they have significantly lower computational requirements, as the extracted features are of very low dimensionality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226796/sample-size-determination-for-bci-studies-how-many-subjects-and-trials
#5
Filip Melinscak, Luis Montesano, Filip Melinscak, Luis Montesano, Filip Melinscak, Luis Montesano
Sample sizes and, consequently, statistical power have a large influence on the reliability of statistical results, but they are often neglected when planning and reporting studies of brain-computer interfaces (BCIs). This may be in part due to the limitations of classical power calculations, which do not apply to nested experimental designs, that are usually employed in BCI research. In this paper we introduce the methodology of simulation-based sample size determination (SSD) for the planning of BCI studies...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226732/lung-tumor-boundary-tracking-in-mri-with-moving-mesh-correspondences-for-adaptive-radio-therapy
#6
Nazanin Tahmasebi, Pierre Boulanger, Kumaradevan Punithakumar, Nazanin Tahmasebi, Pierre Boulanger, Kumaradevan Punithakumar, Kumaradevan Punithakumar, Pierre Boulanger, Nazanin Tahmasebi
Delineation of lung tumor regions from magnetic resonance imaging (MRI) poses many difficulties due to MR signal similarities of the region of interest and surrounding area as well as the influence of respiration. However, accurate segmentation of the tumor region is of utmost importance in planning a radiation therapy since a small error can result in some healthy tissues to receive excessive radiation. This study presents a semi-automated method to delineate lung tumor regions from a sequence of MRIs. The proposed method uses a non-rigid image registration framework to propagate the boundaries of the tumor region in MRI acquired during a radiation treatment stage, given manual segmentation on frames acquired during pretreatment stage...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226705/non-rigid-mri-ct-registration-for-effective-planning-of-prostate-brachytherapy
#7
I Hamdan, G Dardenne, J Bert, D Visvikis, I Hamdan, G Dardenne, J Bert, D Visvikis, I Hamdan, G Dardenne, J Bert, D Visvikis
Prostate brachytherapy is an intraoperative radiotherapy technique for irradiating prostate tumors by placing radioactive sources inside the prostate. CT image is used to calculate a personalized dose distribution (PDD) while the MRI is used to visualize the tumor and the organs at risk. Therefore, a registration of preoperative MRI and CT is essential since it could improve the overall precision of the treatment planning, the placement of radioactive sources inside the prostate as well as the visualization of the dose distribution with respect to the tumor...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226465/in-silico-pre-clinical-trials-for-implantable-cardioverter-defibrillators
#8
Zhihao Jiang, Houssam Abbas, Kuk Jin Jang, Marco Beccani, Jackson Liang, Sanjay Dixit, Rahul Mangharam, Zhihao Jiang, Houssam Abbas, Kuk Jin Jang, Marco Beccani, Jackson Liang, Sanjay Dixit, Rahul Mangharam, Jackson Liang, Marco Beccani, Sanjay Dixit, Rahul Mangharam, Houssam Abbas, Zhihao Jiang, Kuk Jin Jang
Regulatory authorities require that the safety and efficacy of a new high-risk medical device be proven in a Clinical Trial (CT), in which the effects of the device on a group of patients are compared to the effects of the current standard of care. Phase III trials can run for several years, cost millions of dollars, and expose patients to an unproven device. In this paper, we demonstrate how to use a large group of synthetic patients based on computer modeling to improve the planning of a CT so as to increase the chances of a successful trial for implantable cardioverter defibrillators (ICDs)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226252/linkage-of-traffic-crash-and-hospitalization-records-with-limited-identifiers-for-enhanced-public-health-surveillance
#9
Sarah Conderino, Lawrence Fung, Slavenka Sedlar, Jennifer M Norton
BACKGROUND: Motor vehicle traffic (MVT) crashes kill or seriously injure approximately 4250 people in New York City (NYC) each year. Traditionally, NYC surveillance practices use hospitalization and crash data separately to monitor trends in MVT-related injuries, but key information linking crash circumstances to health outcomes is lost when analyzing these data sources in isolation. Our objective was to match crash reports to hospitalization records to create a traffic injury surveillance dataset that can be used to describe crash circumstances and related injury outcomes...
February 19, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28225420/committee-opinion-no-690-summary-carrier-screening-in-the-age-of-genomic-medicine
#10
(no author information available yet)
Carrier screening, whether targeted or expanded, allows individuals to consider their range of reproductive options. Ultimately, the goal of genetic screening is to provide individuals with meaningful information that they can use to guide pregnancy planning based on their personal values. Ethnic-specific, panethnic, and expanded carrier screening are acceptable strategies for prepregnancy and prenatal carrier screening. Because all of these are acceptable strategies, each obstetrician-gynecologist or other health care provider or practice should establish a standard approach that is consistently offered to and discussed with each patient, ideally before pregnancy...
March 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28225312/perspectives-on-learning-and-clinical-practice-improvement-for-diabetes-in-the-hospital-a-review-of-educational-interventions-for-providers
#11
Ariana Pichardo-Lowden, Paul Haidet, Guillermo E Umpierrez
BACKGROUND: The management inpatient hyperglycemia and diabetes requires expertise among many healthcare providers. There is limited evidence about how education for healthcare providers can result in optimization of clinical outcomes. The purpose of this critical review of the literature is to examine methods and outcomes related to educational interventions regarding the management of diabetes and dysglycemia in the hospital setting. This report provides recommendations to advance learning, curricular planning and clinical practice...
February 22, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28225040/vulnerability-of-the-british-swine-industry-to-classical-swine-fever
#12
Thibaud Porphyre, Carla Correia-Gomes, Margo E Chase-Topping, Kokouvi Gamado, Harriet K Auty, Ian Hutchinson, Aaron Reeves, George J Gunn, Mark E J Woolhouse
Classical swine fever (CSF) is a notifiable, highly contagious viral disease of swine which results in severe welfare and economic consequences in affected countries. To improve preparedness, it is critical to have some understanding of how CSF would spread should it be introduced. Based on the data recorded during the 2000 epidemic of CSF in Great Britain (GB), a spatially explicit, premises-based model was developed to explore the risk of CSF spread in GB. We found that large outbreaks of CSF would be rare and generated from a limited number of areas in GB...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224099/using-quality-improvement-methods-to-increase-use-of-pain-prevention-strategies-for-childhood-vaccination
#13
Jennifer Verrill Schurman, Amanda D Deacy, Rebecca J Johnson, Jolynn Parker, Kristi Williams, Dustin Wallace, Mark Connelly, Lynn Anson, Kevin Mroczka
AIM: To increase evidence-based pain prevention strategy use during routine vaccinations in a pediatric primary care clinic using quality improvement methodology. METHODS: Specific intervention strategies (i.e., comfort positioning, nonnutritive sucking and sucrose analgesia, distraction) were identified, selected and introduced in three waves, using a Plan-Do-Study-Act framework. System-wide change was measured from baseline to post-intervention by: (1) percent of vaccination visits during which an evidence-based pain prevention strategy was reported as being used; and (2) caregiver satisfaction ratings following the visit...
February 8, 2017: World Journal of Clinical Pediatrics
https://www.readbyqxmd.com/read/28222941/diabetes-and-lifetime-risk-of-stroke-and-subtypes-in-an-urban-middle-aged-population
#14
Tanvir Chowdhury Turin, Tomonori Okamura, Nahid Rumana, Arfan Raheen Afzal, Makoto Watanabe, Aya Higashiyama, Yoko M Nakao, Michikazu Nakai, Misa Takegami, Kunihiro Nishimura, Yoshihiro Kokubo, Akira Okayama, Yoshihiro Miyamoto
AIMS: Lifetime risk (LTR) is defined as the cumulative probability of developing a disease in one's remaining lifetime from a given index age. The impact of diabetes on the LTR of stroke events in Asians, where stroke incidence is higher than for Westerners, has not been estimated yet. These estimates can be useful for diabetes knowledge translation activities. METHODS: All participants who were stroke-free at baseline in the Suita Study, a cohort study of cardiovascular diseases in Japan, were included in the study sample...
February 10, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28222778/sample-size-considerations-for-trials-using-cerebral-white-matter-hyperintensity-progression-as-an-intermediate-outcome-at-1%C3%A2-year-after-mild-stroke-results-of-a-prospective-cohort-study
#15
Francesca M Chappell, Maria Del Carmen Valdés Hernández, Stephen D Makin, Kirsten Shuler, Eleni Sakka, Martin S Dennis, Paul A Armitage, Susana Muñoz Maniega, Joanna M Wardlaw
BACKGROUND: White matter hyperintensities (WMHs) are commonly seen on in brain imaging and are associated with stroke and cognitive decline. Therefore, they may provide a relevant intermediate outcome in clinical trials. WMH can be measured as a volume or visually on the Fazekas scale. We investigated predictors of WMH progression and design of efficient studies using WMH volume and Fazekas score as an intermediate outcome. METHODS: We prospectively recruited 264 patients with mild ischaemic stroke and measured WMH volume, Fazekas score, age and cardiovascular risk factors at baseline and 1 year...
February 21, 2017: Trials
https://www.readbyqxmd.com/read/28222736/implementing-guidelines-and-training-initiatives-to-improve-cross-cultural-communication-in-primary-care-consultations-a-qualitative-participatory-european-study
#16
E Teunissen, K Gravenhorst, C Dowrick, E Van Weel-Baumgarten, F Van den Driessen Mareeuw, T de Brún, N Burns, C Lionis, F S Mair, C O'Donnell, M O'Reilly-de Brún, M Papadakaki, A Saridaki, W Spiegel, C Van Weel, M Van den Muijsenbergh, A MacFarlane
BACKGROUND: Cross-cultural communication in primary care is often difficult, leading to unsatisfactory, substandard care. Supportive evidence-based guidelines and training initiatives (G/TIs) exist to enhance cross cultural communication but their use in practice is sporadic. The objective of this paper is to elucidate how migrants and other stakeholders can adapt, introduce and evaluate such G/TIs in daily clinical practice. METHODS: We undertook linked qualitative case studies to implement G/TIs focused on enhancing cross cultural communication in primary care, in five European countries...
February 10, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28222713/the-mental-health-status-of-refugees-and-asylum-seekers-attending-a-refugee-health-clinic-including-comparisons-with-a-matched-sample-of-australian-born-residents
#17
Frances Shawyer, Joanne C Enticott, Andrew A Block, I-Hao Cheng, Graham N Meadows
BACKGROUND: The aim of this study was to survey refugees and asylum-seekers attending a Refugee Health Service in Melbourne, Australia to estimate the prevalence of psychiatric disorders based on screening measures and with post-traumatic stress disorder (PTSD) specifically highlighted. A secondary aim was to compare the prevalence findings with Australian-born matched comparators from the 2007 National Survey of Mental Health and Well-Being. METHODS: We conducted a cross-sectional survey of 135 refugees and asylum-seeker participants using instruments including Kessler-10 (K10) and PTSD-8 to obtain estimates of the prevalence of mental disorders...
February 21, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28222682/a-statistical-method-utilizing-information-of-imported-cases-to-estimate-the-transmissibility-for-an-influenza-pandemic
#18
Ka Chun Chong, Benny Chung Ying Zee, Maggie Haitian Wang
BACKGROUND: In a new influenza pandemic, travel data such as arrival times of cases seeded by the originating country can be regarded as a combination of the epidemic size and the mobility networks of infections connecting the originating country with other regions. It can be a complete and timely source for estimating the basic reproduction number (R 0 ), a key indicator of disease transmissibility. METHOD: In this study, we developed a likelihood-based method using arrival times of infected cases in different countries to estimate R 0 for influenza pandemics...
February 21, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28222351/the-land-morphology-approach-to-flood-risk-mapping-an-application-to-portugal
#19
N S Cunha, M R Magalhães, T Domingos, M M Abreu, C Küpfer
In the last decades, the increasing vulnerability of floodplains is linked to societal changes such as population density growth, land use changes, water use patterns, among other factors. Land morphology directly influences surface water flow, transport of sediments, soil genesis, local climate and vegetation distribution. Therefore, the land morphology, the land used and management directly influences flood risks genesis. However, attention is not always given to the underlying geomorphological and ecological processes that influence the dynamic of rivers and their floodplains...
February 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28221991/detecting-clinically-meaningful-shape-clusters-in-medical-image-data-metrics-analysis-for-hierarchical-clustering-applied-to-healthy-and-pathological-aortic-arches
#20
Jan L Bruse, Maria A Zuluaga, Abbas Khushnood, Kristin McLeod, Hopewell N Ntsinjana, Tain-Yen Hsia, Maxime Sermesant, Xavier Pennec, Andrew M Taylor, Silvia Schievano
OBJECTIVE: Today's growing medical image databases call for novel processing tools to structure the bulk of data and extract clinically relevant information. Unsupervised hierarchical clustering may reveal clusters within anatomical shape data of patient populations as required for modern Precision Medicine strategies. Few studies have applied hierarchical clustering techniques to three-dimensional patient shape data and results depend heavily on the chosen clustering distance metrics and linkage functions...
February 16, 2017: IEEE Transactions on Bio-medical Engineering
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