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https://www.readbyqxmd.com/read/28528467/changes-in-deviation-of-absorbed-dose-to-water-among-users-by-chamber-calibration-shift
#1
Tetsurou Katayose, Hidetoshi Saitoh, Mitsunobu Igari, Weishan Chang, Shimpei Hashimoto, Mie Morioka
PURPOSE: The JSMP01 dosimetry protocol had adopted the provisional (60)Co calibration coefficient [Formula: see text], namely, the product of exposure calibration coefficient N C and conversion coefficient k D,X. After that, the absorbed dose to water D w standard was established, and the JSMP12 protocol adopted the [Formula: see text] calibration. In this study, the influence of the calibration shift on the measurement of D w among users was analyzed. MATERIALS AND METHODS: The intercomparison of the D w using an ionization chamber was annually performed by visiting related hospitals...
May 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28527818/predictors-associated-with-increased-prevalence-of-abdominal-aortic-aneurysm-in-chinese-patients-with-atherosclerotic-risk-factors
#2
W Li, S Luo, J Luo, Y Liu, B Ning, W Huang, L Xue, J Chen
OBJECTIVE/BACKGROUND: Epidemiological screening studies have demonstrated that the prevalence of abdominal aortic aneurysm (AAA) of Asian origin appears to be low and so increases uncertainty about the cost effectiveness of screening for AAAs in Chinese people. Some studies have demonstrated a higher prevalence of AAA in patients with atherosclerotic risk factors. The purpose of the study was to determine the prevalence of AAA and to explore the high risk group of AAA in Chinese patients with atherosclerotic risk factors...
May 17, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28527790/visual-cortex-signals-a-mismatch-between-regularity-of-auditory-and-visual-streams
#3
Michael Andric, Ben Davis, Uri Hasson
Understanding how humans code for and respond to environmental uncertainty/regularity is a question shared by current computational and neurobiological approaches to human cognition. To date, studies investigating neurobiological systems that track input uncertainty have examined responses to uni-sensory streams. It is not known, however, whether there exist brain systems that combine information about the regularity of input streams presented to different senses. We report an fMRI study that aimed to identify brain systems that relate statistical information across sensory modalities...
May 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28527773/prevalence-management-and-long-term-6-year-outcomes-of-atrial%C3%A2-fibrillation-among-patients-receiving-drug-eluting-coronary-stents
#4
Hyo-In Choi, Jung-Min Ahn, Se Hun Kang, Pil Hyung Lee, Soo-Jin Kang, Seung-Whan Lee, Young-Hak Kim, Cheol Whan Lee, Seong-Wook Park, Duk-Woo Park, Seung-Jung Park
OBJECTIVES: This study sought to investigate the incidence, management, and clinical relevance of atrial fibrillation (AF) during and after percutaneous coronary intervention (PCI) with drug-eluting stents (DES) and evaluate outcomes of different antithrombotic strategies. BACKGROUND: Uncertainty exists regarding the optimal antithrombotic strategy in patients with AF who are undergoing PCI with DES. METHODS: Using a consecutive series of 10,027 patients who underwent DES implantation between 2003 and 2011, we evaluated the overall prevalence and clinical impact of AF...
May 11, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28527687/cost-effectiveness-analysis-of-typhoid-conjugate-vaccines-in-five-endemic-low-and-middle-income-settings
#5
Marina Antillón, Joke Bilcke, A David Paltiel, Virginia E Pitzer
BACKGROUND: Typhoid fever remains endemic in low- and middle-income countries. Programmatic use of existing vaccines is limited, but upcoming typhoid conjugate vaccines (TCVs) could warrant wider use. We evaluated the cost-effectiveness of five TCV delivery strategies in three urban areas (Delhi and Kolkata, India and Nairobi, Kenya) and two rural settings (Lwak, Kenya and Dong Thap, Vietnam) with varying incidence. METHODS AND FINDINGS: We evaluated routine infant vaccination with and without catch-up campaigns among older individuals...
May 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28527657/clinical-outcomes-and-cost-effectiveness-of-brief-guided-parent-delivered-cognitive-behavioural-therapy-and-solution-focused-brief-therapy-for-treatment-of-childhood-anxiety-disorders-a-randomised-controlled-trial
#6
Cathy Creswell, Mara Violato, Hannah Fairbanks, Elizabeth White, Monika Parkinson, Gemma Abitabile, Alessandro Leidi, Peter J Cooper
BACKGROUND: Half of all lifetime anxiety disorders emerge before age 12 years; however, access to evidence-based psychological therapies for affected children is poor. We aimed to compare the clinical outcomes and cost-effectiveness of two brief psychological treatments for children with anxiety referred to routine child mental health settings. We hypothesised that brief guided parent-delivered cognitive behavioural therapy (CBT) would be associated with better clinical outcomes than solution-focused brief therapy and would be cost-effective...
May 17, 2017: Lancet Psychiatry
https://www.readbyqxmd.com/read/28527605/analysis-of-gafchromic-ebt3-film-calibration-irradiated-with-gamma-rays-from-different-systems-gamma-knife-and-cobalt-60-unit
#7
Monsen Najafi, Ghazale Geraily, Alireza Shirazi, Mahbod Esfahani, Javad Teimouri
In recent years, Gafchromic films are used as an advanced instrument for dosimetry systems. The EBT3 films are a new generation of Gafchromic films. Our main interest is to compare the response of the EBT3 films exposed to gamma rays provided by the Theratron 780C as a conventional radiotherapy system and the Leksell Gamma Knife as a stereotactic radiotherapy system (SRS). Both systems use Cobalt-60 sources, thus using the same energy. However, other factors such as source-to-axis distance, number of sources, dose rate, direction of irradiation, shape of phantom, the field shape of radiation, and different scatter contribution may influence the calibration curve...
May 17, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28527533/global-regional-and-national-burden-of-cardiovascular-diseases-for-10-causes-1990-to-2015
#8
Gregory A Roth, Catherine Johnson, Amanuel Abajobir, Foad Abd-Allah, Semaw Ferede Abera, Gebre Abyu, Muktar Ahmed, Baran Aksut, Tahiya Alam, Khurshid Alam, François Alla, Nelson Alvis-Guzman, Stephen Amrock, Hossein Ansari, Johan Ärnlöv, Hamid Asayesh, Tesfay Mehari Atey, Leticia Avila-Burgos, Ashish Awasthi, Amitava Banerjee, Aleksandra Barac, Till Bärnighausen, Lars Barregard, Neeraj Bedi, Ezra Belay Ketema, Derrick Bennett, Gebremedhin Berhe, Zulfiqar Bhutta, Shimelash Bitew, Jonathan Carapetis, Juan Jesus Carrero, Deborah Carvalho Malta, Carlos Andres Castañeda-Orjuela, Jacqueline Castillo-Rivas, Ferrán Catalá-López, Jee-Young Choi, Hanne Christensen, Massimo Cirillo, Leslie Cooper, Michael Criqui, David Cundiff, Albertino Damasceno, Lalit Dandona, Rakhi Dandona, Kairat Davletov, Samath Dharmaratne, Prabhakaran Dorairaj, Manisha Dubey, Rebecca Ehrenkranz, Maysaa El Sayed Zaki, Emerito Jose A Faraon, Alireza Esteghamati, Talha Farid, Maryam Farvid, Valery Feigin, Eric L Ding, Gerry Fowkes, Tsegaye Gebrehiwot, Richard Gillum, Audra Gold, Philimon Gona, Rajeev Gupta, Tesfa Dejenie Habtewold, Nima Hafezi-Nejad, Tesfaye Hailu, Gessessew Bugssa Hailu, Graeme Hankey, Hamid Yimam Hassen, Kalkidan Hassen Abate, Rasmus Havmoeller, Simon I Hay, Masako Horino, Peter J Hotez, Kathryn Jacobsen, Spencer James, Mehdi Javanbakht, Panniyammakal Jeemon, Denny John, Jost Jonas, Yogeshwar Kalkonde, Chante Karimkhani, Amir Kasaeian, Yousef Khader, Abdur Khan, Young-Ho Khang, Sahil Khera, Abdullah T Khoja, Jagdish Khubchandani, Daniel Kim, Dhaval Kolte, Soewarta Kosen, Kristopher J Krohn, G Anil Kumar, Gene Kwan, Dharmesh Kumar Lal, Anders Larsson, Shai Linn, Alan Lopez, Paulo A Lotufo, Hassan Magdy Abd El Razek, Reza Malekzadeh, Mohsen Mazidi, Toni Meier, Kidanu Gebremariam Meles, George Mensah, Atte Meretoja, Haftay Mezgebe, Ted Miller, Erkin Mirrakhimov, Shafiu Mohammed, Andrew E Moran, Kamarul Imran Musa, Jagat Narula, Bruce Neal, Frida Ngalesoni, Grant Nguyen, Carla Makhlouf Obermeyer, Mayowa Owolabi, George Patton, João Pedro, Dima Qato, Mostafa Qorbani, Kazem Rahimi, Rajesh Kumar Rai, Salman Rawaf, Antônio Ribeiro, Saeid Safiri, Joshua A Salomon, Itamar Santos, Milena Santric Milicevic, Benn Sartorius, Aletta Schutte, Sadaf Sepanlou, Masood Ali Shaikh, Min-Jeong Shin, Mehdi Shishehbor, Hirbo Shore, Diego Augusto Santos Silva, Eugene Sobngwi, Saverio Stranges, Soumya Swaminathan, Rafael Tabarés-Seisdedos, Niguse Tadele Atnafu, Fisaha Tesfay, J S Thakur, Amanda Thrift, Roman Topor-Madry, Thomas Truelsen, Stefanos Tyrovolas, Kingsley Nnanna Ukwaja, Olalekan Uthman, Tommi Vasankari, Vasiliy Vlassov, Stein Emil Vollset, Tolassa Wakayo, David Watkins, Robert Weintraub, Andrea Werdecker, Ronny Westerman, Charles Shey Wiysonge, Charles Wolfe, Abdulhalik Workicho, Gelin Xu, Yuichiro Yano, Paul Yip, Naohiro Yonemoto, Mustafa Younis, Chuanhua Yu, Theo Vos, Mohsen Naghavi, Christopher Murray
BACKGROUND: The burden of cardiovascular diseases (CVDs) remains unclear in many regions of the world. OBJECTIVES: The GBD (Global Burden of Disease) 2015 study integrated data on disease incidence, prevalence, and mortality to produce consistent, up-to-date estimates for cardiovascular burden. METHODS: CVD mortality was estimated from vital registration and verbal autopsy data. CVD prevalence was estimated using modeling software and data from health surveys, prospective cohorts, health system administrative data, and registries...
May 15, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28527455/uncertainty-quantification-and-propagation-of-errors-of-the-lennard-jones-12-6-parameters-for-n-alkanes
#9
Richard A Messerly, Thomas A Knotts, W Vincent Wilding
Molecular simulation has the ability to predict various physical properties that are difficult to obtain experimentally. For example, we implement molecular simulation to predict the critical constants (i.e., critical temperature, critical density, critical pressure, and critical compressibility factor) for large n-alkanes that thermally decompose experimentally (as large as C48). Historically, molecular simulation has been viewed as a tool that is limited to providing qualitative insight. One key reason for this perceived weakness in molecular simulation is the difficulty to quantify the uncertainty in the results...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28527314/accuracy-and-precision-of-thickness-determination-from-position-averaged-convergent-beam-electron-diffraction-patterns-using-a-single-parameter-metric
#10
J A Pollock, M Weyland, D J Taplin, L J Allen, S D Findlay
Position-averaged convergent beam electron diffraction patterns are formed by averaging the transmission diffraction pattern while scanning an atomically-fine electron probe across a sample. Visual comparison between experimental and simulated patterns is increasingly being used for sample thickness determination. We explore automating the comparison via a simple sum square difference metric. The thickness determination is shown to be accurate (i.e. the best-guess deduced thickness generally concurs with the true thickness), though factors such as noise, mistilt and inelastic scattering reduce the precision (i...
May 10, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28527301/exploration-of-dietary-patterns-and-alcohol-consumption-in-pregnant-women-in-the-uk-a-mixed-methods-study
#11
Victoria Coathup, Lesley Smith, Mary Boulton
BACKGROUND: fetal Alcohol Spectrum Disorders is a term used to describe a range of physical, cognitive and behavioural deficits in the offspring of women who drank alcohol during pregnancy. A growing body of evidence suggests alcohol consumption in the presence of poor maternal nutrition may increase the risk of harm to the developing fetus. OBJECTIVE: to investigate relationships between maternal dietary patterns and alcohol consumption, and explore which factors influence women's decisions about what to eat and drink during pregnancy...
April 27, 2017: Midwifery
https://www.readbyqxmd.com/read/28527145/an-appraisal-of-indonesia-s-immense-peat-carbon-stock-using-national-peatland-maps-uncertainties-and-potential-losses-from-conversion
#12
REVIEW
Matthew Warren, Kristell Hergoualc'h, J Boone Kauffman, Daniel Murdiyarso, Randall Kolka
BACKGROUND: A large proportion of the world's tropical peatlands occur in Indonesia where rapid conversion and associated losses of carbon, biodiversity and ecosystem services have brought peatland management to the forefront of Indonesia's climate mitigation efforts. We evaluated peat volume from two commonly referenced maps of peat distribution and depth published by Wetlands International (WI) and the Indonesian Ministry of Agriculture (MoA), and used regionally specific values of carbon density to calculate carbon stocks...
December 2017: Carbon Balance and Management
https://www.readbyqxmd.com/read/28526667/patient-centered-decision-support-formative-usability-evaluation-of-integrated-clinical-decision-support-with-a-patient-decision-aid-for-minor-head-injury-in-the-emergency-department
#13
Edward R Melnick, Erik P Hess, George Guo, Maggie Breslin, Kevin Lopez, Anthony J Pavlo, Fuad Abujarad, Seth M Powsner, Lori A Post
BACKGROUND: The Canadian Computed Tomography (CT) Head Rule, a clinical decision rule designed to safely reduce imaging in minor head injury, has been rigorously validated and implemented, and yet expected decreases in CT were unsuccessful. Recent work has identified empathic care as a key component in decreasing CT overuse. Health information technology can hinder the clinician-patient relationship. Patient-centered decision tools to support the clinician-patient relationship are needed to promote evidence-based decisions...
May 19, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28526329/a-behaviour-change-intervention-to-reduce-sedentary-time-in-people-with-chronic-obstructive-pulmonary-disease-protocol-for-a-randomised-controlled-trial
#14
Sonia Wing Mei Cheng, Jennifer Alison, Sarah Dennis, Emmanuel Stamatakis, Lissa Spencer, Renae McNamara, Susan Sims, Zoe McKeough
INTRODUCTION: Replacing sedentary behaviour with light intensity physical activity (ie, activities classified as less than three metabolic equivalents, such as slow-paced walking) may be a more realistic strategy for reducing cardiometabolic risk in people with chronic obstructive pulmonary disease than only aiming to increase levels of moderate-vigorous intensity physical activity. Behaviour change interventions to reduce sedentary behaviour in people with chronic obstructive pulmonary disease have not yet been developed or tested...
May 16, 2017: Journal of Physiotherapy
https://www.readbyqxmd.com/read/28526285/single-grain-osl-chronologies-for-the-still-bay-and-howieson-s-poort-industries-and-the-transition-between-them-further-analyses-and-statistical-modelling
#15
Zenobia Jacobs, Richard G Roberts
The chronology of the Still Bay (SB) and Howieson's Poort (HP) lithic industries remains an issue of keen interest because of the central role of these two phases of technological and behavioural innovation within the Middle Stone Age of southern Africa. Several dating studies have been conducted on SB and HP sites, including a pair published by the present authors and our colleagues in 2008 and 2013. These reported the results of systematically applying single-grain optically stimulated luminescence (OSL) dating procedures to 10 sites in South Africa, Lesotho and Namibia to constrain the timing of the start and end of the SB and HP and reveal the existence of a gap of several millennia between them...
June 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28525908/mri-based-radiotherapy-planning-method-using-rigid-image-registration-technique-combined-with-outer-body-correction-scheme-a%C3%A2-feasibility-study
#16
Ki Mun Kang, Hoon Sik Choi, Bae Kwon Jeong, Jin Ho Song, In-Bong Ha, Yun Hee Lee, Chul Hang Kim, Hojin Jeong
An alternative pseudo CT generation method for magnetic resonance image (MRI)-based radiotherapy planning was investigated in the work. A pseudo CT was initially generated using the rigid image registration between the planning MRI and previously acquired diagnostic CT scan. The pseudo CT generated was then refined to have the same morphology with that of the referenced planning image scan by applying the outer body correction scheme. This method was applied to some sample of brain image data and the feasibility of the method was assessed by comparing dosimetry results with those from the current gold standard CT-based calculations...
May 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28525814/risk-assessment-of-triclosan-in-the-global-environment-using-a-probabilistic-approach
#17
Jiahua Guo, Hisato Iwata
The occurrence of antimicrobial agent triclosan (TCS) in the global aquatic and terrestrial environment is an emerging concern. While risk assessment for TCS is available in certain countries, no studies have attempted to assess the risk of TCS worldwide. This could be due to lack of method to characterize the global exposure. The present study therefore proposed a probabilistic-based approach to approximate the percent-ranked measured environmental concentrations (MECs) by estimating exposure concentration distribution (ECD) for different environmental compartments on a global scale, incorporating approximate 1200 single MECs...
May 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28525711/protein-partial-molar-volumes-in-multi-component-solutions-from-the-perspective-of-inverse-kirkwood-buff-theory
#18
Cesar Calero-Rubio, Curtis M Strab, Gregory V Barnett, Christopher J Roberts
Inverse Kirkwood-Buff (KB) solution theory can be used to relate macroscopic quantities with molecular scale interactions and correlation functions, in the form of KB integrals. Protein partial specific volumes (<HAT>V</HAT>2) from high-precision density measurements can be used to quantify solvent-solute and solute-solute KB integrals. Currently, general expressions for <HAT>V</HAT>2 as a function of co-solute concentration (c3) have been provided for only binary and ternary solutions...
May 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28525493/influence-of-myelography-and-postmyelographic-ct-on-therapeutic-decisions-in-degenerative-diseases-of-the-cervical-spine
#19
Thomas Westermaier, Christina Doerr, Christian Stetter, Thomas Linsenmann, Stefan Koehler, Joerg Eriskat, Laszlo Solymosi, Ralf-Ingo Ernestus
STUDY DESIGN: A retrospective analysis of clinical records and radiologic imaging by 3 independent reviewers to assess the indication for surgical treatment with and without myelography and postmyelographic computed tomography (MCT). OBJECTIVE: To evaluate whether myelography and MCT obtained in addition to magnetic resonance imaging (MRI) influence therapeutic decisions in degenerative diseases of the cervical spine. SUMMARY OF BACKGROUND DATA: MRI has become the standard examination in spinal diseases...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28524677/experimental-demonstration-of-uncertainty-relations-for-the-triple-components-of-angular-momentum
#20
Wenchao Ma, Bin Chen, Ying Liu, Mengqi Wang, Xiangyu Ye, Fei Kong, Fazhan Shi, Shao-Ming Fei, Jiangfeng Du
The uncertainty principle is considered to be one of the most striking features in quantum mechanics. In the textbook literature, uncertainty relations usually refer to the preparation uncertainty which imposes a limitation on the spread of measurement outcomes for a pair of noncommuting observables. In this work, we study the preparation uncertainty for the angular momentum, especially for spin-1/2. We derive uncertainty relations encompassing the triple components of angular momentum and show that, compared with the relations involving only two components, a triple constant 2/sqrt[3] often arises...
May 5, 2017: Physical Review Letters
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