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https://www.readbyqxmd.com/read/28102968/thoracic-ultrasound-recognition-of-competence-a-position-paper-of-the-thoracic-society-of-australia-and-new-zealand
#1
Jonathan P Williamson, Scott H Twaddell, Y C Gary Lee, Matthew Salamonsen, Mark Hew, David Fielding, Phan Nguyen, Daniel Steinfort, Peter Hopkins, Nicola Smith, Christopher Grainge
The ability to perform bedside thoracic ultrasound is increasingly recognized as an essential skill for thoracic clinicians, extending the clinical examination and aiding diagnostic and therapeutic procedures. Thoracic ultrasound reduces complications and increases success rates when used prior to thoracentesis or intercostal chest tube insertion. It is increasingly difficult to defend performing these procedures without real or near-real time image guidance. To assist thoracic physicians and others achieve and demonstrate thoracic ultrasound competence, the Interventional Pulmonology Special Interest Group (IP-SIG) of the Thoracic Society of Australia and New Zealand (TSANZ) has developed a new pathway with four components: (i) completion of an approved thoracic ultrasound theory and hands-on teaching course...
February 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28102956/experimental-verification-of-4d-monte-carlo-simulations-of-dose-delivery-to-a-moving-anatomy
#2
Sara Gholampourkashi, Miro Vujicic, Jason Belec, Joanna E Cygler, Emily Heath
PURPOSE: To evaluate a novel 4D Monte Carlo simulation tool by comparing calculations to physical measurements using a respiratory motion phantom. METHODS: We used a dynamic Quasar phantom in both stationary and breathing states (sinusoidal motion of amplitude of 1.8 cm and period of 3.3 s) for dose measurements on an Elekta Agility linear accelerator. Gafchromic EBT3 film and the RADPOS 4D dosimetry system were placed inside the lung insert of the phantom to measure dose profiles and point-dose values at the center of the spherical tumor inside the insert...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102946/a-portal-dosimetry-dose-prediction-method-based-on-collapsed-cone-algorithm-using-the-clinical-beam-model
#3
J Martínez Ortega, N Gómez González, P Castro Tejero, M Pinto Monedero, N B Tolani, L Núñez Martín, R Sánchez Montero
PURPOSE: Amorphous silicon electronical portal imaging devices (EPIDs) are widely used for dosimetric measurements in Radiation Therapy. The purpose of this work was to determine if a portal dose prediction method can be utilized for dose map calculations based on the linear accelerator model within a commercial treatment planning system (Pinnacle(3) v8.0 m). METHODS: The method was developed for a 6 MV photon beam on the Varian Clinac 21-EX, at a nominal dose rate of 400 MU/min...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102942/a-platform-independent-method-to-reduce-ct-truncation-artifacts-using-discriminative-dictionary-representations
#4
Yang Chen, Adam Budde, Ke Li, Yinsheng Li, Jiang Hsieh, Guang-Hong Chen
PURPOSE: When the scan field of view (SFOV) of a CT system is not large enough to enclose the entire cross-section of the patient, or the patient needs to be positioned partially outside the SFOV for certain clinical applications, truncation artifacts often appear in the reconstructed CT images. Many truncation artifact correction methods perform extrapolations of the truncated projection data based on certain a priori assumptions. The purpose of this work was to develop a novel CT truncation artifact reduction method that directly operates on DICOM images...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102924/current-practices-related-to-family-presence-during-acute-deterioration-in-adult-emergency-department-patients
#5
Megan J Youngson, Judy Currey, Julie Considine
AIMS: To explore the characteristics and interactions of clinicians, patients and family members during management of the deteriorating adult patient in the Emergency Department. BACKGROUND: Previous research into family presence during resuscitation has identified many positive outcomes when families are included. However, over that last three decades the epidemiology of acute clinical deterioration has changed, with a decrease in in-hospital cardiac arrests and an increase in acute clinical deterioration...
January 19, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28102912/different-spatio-temporal-eeg-features-drive-the-successful-decoding-of-binaural-and-monaural-cues-for-sound-localization
#6
Adam Bednar, Francis M Boland, Edmund C Lalor
The human ability to localize sound is essential for monitoring the environment and helps us to analyze complex auditory scenes. Although the acoustic cues mediating sound localization have been established, it remains unknown how these cues are represented in human cortex. In particular, it is still a point of contention whether binaural and monaural cues are processed by the same or distinct cortical networks. In this study, participants listened to a sequence of auditory stimuli from different spatial locations while we recorded their neural activity using electroencephalography (EEG)...
January 19, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28102897/controls-on-methane-occurrences-in-shallow-aquifers-overlying-the-haynesville-shale-gas-field-east-texas
#7
Jean-Philippe Nicot, Toti Larson, Roxana Darvari, Patrick Mickler, Michael Slotten, Jordan Aldridge, Kristine Uhlman, Ruth Costley
Understanding the source of dissolved methane in drinking-water aquifers is critical for assessing potential contributions from hydraulic fracturing in shale plays. Shallow groundwater in the Texas portion of the Haynesville Shale area (13,000 km(2) ) was sampled (70 samples) for methane and other dissolved light alkanes. Most samples were derived from the fresh water bearing Wilcox formations and show little methane except in a localized cluster of 12 water wells (17% of total) in a approximately 30 × 30 km(2) area in Southern Panola County with dissolved methane concentrations less than 10 mg/L...
January 19, 2017: Ground Water
https://www.readbyqxmd.com/read/28102840/cancer-associated-fibroblasts-enact-field-cancerization-by-promoting-extratumoral-oxidative-stress
#8
Jeremy Soon Kiat Chan, Ming Jie Tan, Ming Keat Sng, Ziqiang Teo, Terri Phua, Chee Chong Choo, Liang Li, Pengcheng Zhu, Nguan Soon Tan
Histological inspection of visually normal tissue adjacent to neoplastic lesions often reveals multiple foci of cellular abnormalities. This suggests the presence of a regional carcinogenic signal that spreads oncogenic transformation and field cancerization. We observed an abundance of mutagenic reactive oxygen species in the stroma of cryosectioned patient tumor biopsies, indicative of extratumoral oxidative stress. Diffusible hydrogen peroxide (H2O2) was elevated in the conditioned medium of cultured skin epithelia at various stages of oncogenic transformation, and H2O2 production increased with greater tumor-forming and metastatic capacity of the studied cell lines...
January 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28102833/a-multimodal-approach-to-estimating-vigilance-using-eeg-and-forehead-eog
#9
Wei-Long Zheng, Baoliang Lu
OBJECTIVE: Covert aspects of ongoing user mental states provide key context information for user-aware human computer interactions. In this paper, we focus on the problem of estimating the vigilance of users using EEG and EOG signals. APPROACH: The PERCLOS index as vigilance annotation is obtained from eye tracking glasses. To improve the feasibility and wearability of vigilance estimation devices for real-world applications, we adopt a novel electrode placement for forehead EOG and extract various eye movement features, which contain the principal information of traditional EOG...
January 19, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28102827/a-low-cost-scalable-current-sensing-digital-headstage-for-high-channel-count-%C3%A2%C2%B5ecog
#10
Michael Trumpis, Michele Insanally, Jialin Zou, Ashraf ElSharif, Ali Ghomashchi, N Sertac Artan, Robert Froemke, Jonathan Viventi
OBJECTIVE: High channel count electrode arrays allow for the monitoring of large-scale neural activity at high spatial resolution. Implantable arrays featuring many recording sites require compact, high bandwidth front-end electronics. In the present study, we investigated the use of a small, light weight, and low cost digital current-sensing integrated circuit for acquiring cortical surface signals from a 61-channel micro-electrocorticographic (��ECoG) array. APPROACH: We recorded both acute and chronic ��ECoG signal from rat auditory cortex using our novel digital current-sensing headstage...
January 19, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28102826/ceramic-particle-engulfment-by-fibroblasts-does-not-alter-at-all-cell-behavior
#11
Pierre-Antoine Faye, Olivier Roualdes, Fabrice Rossignol, Daniel Jean Hartmann, Alexis Desmoulière
Despite many studies, the impact of ceramic particles on cell behavior remains still unclear. The aim of the present study was to investigate the effects of ceramic nano-sized particles on fibroblastic cells. Fibroblasts (dermal fibroblasts freshly isolated from skin samples and WI26 fibroblastic cells) were cultured in monolayer in the presence of alumina or cerium-zirconia particles (��� 50 nm diameter) at two concentrations (100 or 500 ��g.mL-1). Fluorescent alumina particles were also used. Cell morphology, cytoplasmic ceramic incorporation using confocal and transmission electron microscopy, and migration using silicon insert, were analyzed...
January 19, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28102741/tutorial-on-biostatistics-linear-regression-analysis-of-continuous-correlated-eye-data
#12
Gui-Shuang Ying, Maureen G Maguire, Robert Glynn, Bernard Rosner
PURPOSE: To describe and demonstrate appropriate linear regression methods for analyzing correlated continuous eye data. METHODS: We describe several approaches to regression analysis involving both eyes, including mixed effects and marginal models under various covariance structures to account for inter-eye correlation. We demonstrate, with SAS statistical software, applications in a study comparing baseline refractive error between one eye with choroidal neovascularization (CNV) and the unaffected fellow eye, and in a study determining factors associated with visual field in the elderly...
January 19, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28102696/compression-forces-used-in-the-norwegian-breast-cancer-screening-program
#13
Gunvor G Waade, Nataliia Moshina, Sofie Sæbuødegård, Peter Hogg, Solveig Hofvind
OBJECTIVES: Compression is used in mammography to reduce breast thickness, which is claimed to improve image quality and reduce radiation dose. In the XXX Breast Cancer Screening Program (XBCSP), the recommended range of compression force for full field digital mammography is 11-18 kg (108-177 Newton [N]). This is the first study to investigate the compression force used in the program. METHODS: The study included information from 17,951 randomly selected women screened with FFDM at 14 breast centres in the XBCSP, January-March 2014...
January 19, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28102640/activated-macrophages-as-key-mediators-of-capsule-formation-on-adipose-constructs-in-tissue-engineering-chamber-models
#14
Weiqing Zhan, Feng Lu
In plastic and reconstructive field, it would be much beneficial to fabricate an engineered adipose tissue substitute allowing reliable and complete fat tissue regeneration. Tissue engineering chamber (TEC) holds the promise to optimize an adipogenic configuration that is efficacious as well as reproducible. A frequently occurring complication involves the adipose tissue flap encapsulation and, effectively, its shielding, by a thick fibrous membrane, which hinders development into the proliferative stage. The reason for the deposition of the collagen capsule remains unclear...
January 19, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28102618/commentary-beyond-more-of-the-same-sustaining-the-benefits-of-preschool-education-reflections-on-bierman-et%C3%A2-al-2016
#15
Deborah A Phillips
Preschool education is now firmly linked to two aspirational purposes: as the first step on a trajectory of academic and life success for all children and as wise economic policy for the nation. Both purposes are grounded in an assumption that the early developmental boost children receive from preschool will produce lasting impacts. However, efforts to identify enduring impacts of contemporary preschool programs have produced mixed evidence, leading the field to acknowledge that we have yet to adequately understand the essential conditions and processes in early education classrooms that increase the odds that children will flourish in school and thrive in their adult lives...
February 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28102580/the-sliding-context-of-health-the-challenges-faced-by-patients-with-heart-failure-from-the-perspective-of-patients-health-care-providers-and-family-members
#16
Parvin Mangolian Shahrbabaki, Esmat Nouhi, Majid Kazemi, Fazlollah Ahmadi
AIMS AND OBJECTIVES: The aim of this study was to understand the challenges faced by patients with heart failure. BACKGROUND: Heart failure is a clinical syndrome that is increasing across the globe. People affected with it, encounter various problems that reduce their quality of life and well-being. Therefore, identifying the challenges faced by patients with heart failure is necessary for health care and treatment plans. DESIGN: This study was performed using the qualitative research approach and content analysis method...
January 19, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28102563/multiscale-modeling-methods-in-biomechanics
#17
REVIEW
Pinaki Bhattacharya, Marco Viceconti
More and more frequently, computational biomechanics deals with problems where the portion of physical reality to be modeled spans over such a large range of spatial and temporal dimensions, that it is impossible to represent it as a single space-time continuum. We are forced to consider multiple space-time continua, each representing the phenomenon of interest at a characteristic space-time scale. Multiscale models describe a complex process across multiple scales, and account for how quantities transform as we move from one scale to another...
January 19, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28102515/attention-deficit-hyperactivity-disorder-adhd-and-obesity-update-2016
#18
REVIEW
Samuele Cortese, Luca Tessari
While psychiatric comorbidities of attention-deficit/hyperactivity disorder (ADHD) have been extensively explored, less attention has been paid to somatic conditions possibly associated with this disorder. However, mounting evidence in the last decade pointed to a possible significant association between ADHD and certain somatic conditions, including obesity. This papers provides an update of a previous systematic review on the relationship between obesity and ADHD (Cortese and Vincenzi, Curr Top Behav Neurosci 9:199-218, 2012), focusing on pertinent peer-reviewed empirical papers published since 2012...
January 2017: Current Psychiatry Reports
https://www.readbyqxmd.com/read/28102442/seasonal-differences-in-thermal-sensation-in-the-outdoor-urban-environment-of-mediterranean-climates-the-example-of-athens-greece
#19
Areti Tseliou, Ioannis X Tsiros, Marialena Nikolopoulou
Outdoor urban areas are very important for cities and microclimate is a critical parameter in the design process, contributing to thermal comfort which is important for urban developments. The research presented in this paper is part of extensive field surveys conducted in Athens aimed at investigating people's thermal sensation in a Mediterranean city. Based on 2313 questionnaires and microclimatic data the current work focuses on the relative frequencies of people's evaluation of the thermal along with the sun and wind sensations between two seasons trying to identify the seasonal differences in thermal sensation...
January 19, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28102384/predicting-point-defect-equilibria-across-oxide-hetero-interfaces-model-system-of-zro2-cr2o3
#20
Jing Yang, Mostafa Youssef, Bilge Yildiz
We present a multi-scale approach to predict equilibrium defect concentrations across oxide/oxide hetero-interfaces. There are three factors that need to be taken into account simultaneously for computing defect redistribution around the hetero-interfaces: the variation of local bonding environment at the interface as epitomized in defect segregation energies, the band offset at the interface, and the equilibration of the chemical potentials of species and electrons via ionic and electronic drift-diffusion fluxes...
January 19, 2017: Physical Chemistry Chemical Physics: PCCP
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