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https://www.readbyqxmd.com/read/28432806/rapid-acceptance-testing-of-modern-linac-using-on-board-mv-and-kv-imaging-systems
#1
Sridhar Yaddanapudi, Bin Cai, Taylor Harry, Steven Dolly, Baozhou Sun, Hua Li, Keith Stinson, Camille Noel, Lakshmi Santanam, Todd Pawlicki, Sasa Mutic, S Murty Goddu
PURPOSE: The purpose of this study was to develop a novel process for using on-board MV and kV Electronic Portal Imaging Devices (EPIDs) to perform linac acceptance testing (AT) for two reasons: 1) to standardize the assessment of new equipment performance, and 2) to reduce the time to clinical use while reducing physicist workload. METHODS AND MATERIALS: In this study, Varian TrueBeam linacs equipped with amorphous silicon based EPID (aS1000) were used. The conventional set of AT tests and tolerances were used as a baseline guide...
April 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28432636/what-is-the-current-knowledge-about-the-cardiovascular-risk-for-users-of-cannabis-based-products-a-systematic-review
#2
REVIEW
Emilie Jouanjus, Valentin Raymond, Maryse Lapeyre-Mestre, Valérie Wolff
PURPOSE OF REVIEW: The purpose of the study was to examine the published evidence on the cardiovascular risk related to the use of cannabis-based products by performing a systematic review of recent literature. RECENT FINDINGS: The World Health Organization (WHO) emphasizes that cannabis use represents a risky behavior as it may lead to many adverse effects, and in particular, cardiovascular effects. A systematic review of articles published between January 1, 2011 and May 31, 2016 was performed in agreement with the PRISMA statement...
June 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28432606/neuromuscular-electrostimulation-a-new-therapeutic-option-to-improve-radio-cephalic-arteriovenous-fistula-maturation-in-end-stage-chronic-kidney-disease-patients
#3
Lucia Martinez, Vicent Esteve, Montserrat Yeste, Vicent Artigas, Secundino Llagostera
BACKGROUND: Radio-cephalic arteriovenous fistula (RCAVF) is the gold standard vascular access for end-stage chronic kidney disease patients. Exercises after arteriovenous fistula (AVF) creation improve maturation. No articles are published regarding neuromuscular electrostimulation (NMES) in AVF maturation. OBJECTIVES: To assess the usefulness of a NMES programme on RCAVF maturation process. METHODS: An 8-week single-centre prospective study...
April 21, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28432287/advantages-of-unfair-quantum-ground-state-sampling
#4
Brian Hu Zhang, Gene Wagenbreth, Victor Martin-Mayor, Itay Hen
The debate around the potential superiority of quantum annealers over their classical counterparts has been ongoing since the inception of the field. Recent technological breakthroughs, which have led to the manufacture of experimental prototypes of quantum annealing optimizers with sizes approaching the practical regime, have reignited this discussion. However, the demonstration of quantum annealing speedups remains to this day an elusive albeit coveted goal. We examine the power of quantum annealers to provide a different type of quantum enhancement of practical relevance, namely, their ability to serve as useful samplers from the ground-state manifolds of combinatorial optimization problems...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432182/toward-a-direct-and-scalable-identification-of-reduced-models-for-categorical-processes
#5
Susanne Gerber, Illia Horenko
The applicability of many computational approaches is dwelling on the identification of reduced models defined on a small set of collective variables (colvars). A methodology for scalable probability-preserving identification of reduced models and colvars directly from the data is derived-not relying on the availability of the full relation matrices at any stage of the resulting algorithm, allowing for a robust quantification of reduced model uncertainty and allowing us to impose a priori available physical information...
April 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28431896/pressurized-intraperitoneal-aerosol-chemotherapy-%C3%A2-practical-aspects
#6
M Hübner, F Grass, H Teixeira-Farinha, B Pache, P Mathevet, N Demartines
INTRODUCTION: Pressurized Intraperitoneal Aerosol Chemotherapy (PIPAC) has been introduced as novel treatment for peritoneal carcinomatosis. Only proper patient selection, stringent safety protocol and careful surgery allow for a secure procedure. We hereby report the essentials for safe implementation. METHODS: All consecutive procedures within 20 months after PIPAC implementation were analyzed with regards to practical and surgical aspects. Special emphasis was laid on modifications of technique and safety measures during the implementation process with systematic use of a dedicated checklist...
April 8, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28431687/a-rapid-impregnation-method-for-loading-desired-amounts-of-extractant-on-prepacked-reversed-phase-columns-for-high-performance-liquid-chromatographic-separation-of-metal-ions
#7
Muhammad Ramzan, Dejene Kifle, Grethe Wibetoe
A time-efficient impregnation method for loading extractant onto reversed-phase columns was developed, using di-(2-ethylhexyl) phosphoric acid (HDEHP) as a model extractant. The optimal loading conditions for the impregnation process of a standard analytical scale column was achieved by dissolving an appropriate amount of HDEHP (per void volume) in n-pentane, flushing the column with two void volumes (5mL) of impregnation solution and heating the column for a short time to remove the solvent. The process takes about one hour, a significant time reduction compared to commonly used impregnation methods (17-23h)...
April 7, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28431640/rapid-assessment-of-drugs-of-abuse
#8
Joesph R Wiencek, Jennifer M Colby, James H Nichols
Laboratory testing for drugs of abuse has become standard practice in many settings both forensic and clinical. Urine is the predominant specimen, but other specimens are possible including hair, nails, sweat, and oral fluid. Point-of-care test kits provide for rapid analysis at the site where specimens are collected allowing for immediate action on the results. POCT is based on immunochromatography where the drug in the patient's sample competes with drug and antibody conjugates in the test to develop or block the development of a colored line...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28431587/psychometric-properties-of-the-sdm-q-9-questionnaire-for-shared-decision-making-in-multiple-sclerosis-item-response-theory-modelling-and-confirmatory-factor-analysis
#9
Javier Ballesteros, Ester Moral, Luis Brieva, Elena Ruiz-Beato, Daniel Prefasi, Jorge Maurino
BACKGROUND: Shared decision-making is a cornerstone of patient-centred care. The 9-item Shared Decision-Making Questionnaire (SDM-Q-9) is a brief self-assessment tool for measuring patients' perceived level of involvement in decision-making related to their own treatment and care. Information related to the psychometric properties of the SDM-Q-9 for multiple sclerosis (MS) patients is limited. The objective of this study was to assess the performance of the items composing the SDM-Q-9 and its dimensional structure in patients with relapsing-remitting MS...
April 22, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28431210/exotic-gill-lice-species-copepoda-lernaeopodidae-salmincola-spp-infect-rainbow-trout-oncorhynchus-mykiss-and-brook-trout-salvelinus-fontinalis-in-the-southeastern-united-states
#10
Carlos F Ruiz, Jacob M Rash, Doug A Besler, Jackson R Roberts, Micah B Warren, Cova R Arias, Stephen A Bullard
Salmincola californiensis infected 25 of 31 (prevalence 0.8; intensity 2-35 [mean 6.6 ± standard deviation 7.7; n = 25]) rainbow trout, Oncorhynchus mykiss, from a private trout farm connected to the Watauga River, North Carolina. Salmincola edwardsii infected all of 9 (1.0; 2-43 [9.3 ± 13.0; 9]) brook trout, Salvelinus fontinalis, from Big Norton Prong, a tributary of the Little Tennessee River, North Carolina. Both lernaeopodids are well-known salmonid pathogens but neither is native to, nor has been previously taxonomically confirmed from, the southeastern United States...
April 21, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28431159/likelihood-of-tree-topologies-with-fossils-and-diversification-rate-estimation
#11
Gilles Didier, Marine Fau, Michel Laurin
Since the diversification process cannot be directly observed at the human scale, it has to be studied from the information available, namely the extant taxa and the fossil record. In this sense, phylogenetic trees including both extant taxa and fossils are the most complete representations of the diversification process that one can get. Such phylogenetic trees can be reconstructed from molecular and morphological data, to some extent. Among the temporal information of such phylogenetic trees, fossil ages are by far the most precisely known (divergence times are inferences calibrated mostly with fossils)...
April 18, 2017: Systematic Biology
https://www.readbyqxmd.com/read/28431094/incidence-of-broiler-breast-myopathies-at-2-different-ages-and-its-impact-on-selected-raw-meat-quality-parameters
#12
V A Kuttappan, C M Owens, C Coon, B M Hargis, M Vazquez-Añon
White striping (WS) and woody breast (WB) are 2 poultry meat quality defects that affect the acceptance of raw breast fillets as well as properties of cooked and further processed products. The present study was intended to evaluate the incidence of these conditions in broilers at different ages and to compare the properties of fillets with different degrees of WS and WB. For this study, 1,920 birds were processed, at 6 and 9 wk of age, in a standard commercial inline processing system. After chilling, carcasses were deboned and butterfly fillets were collected and weighed...
April 18, 2017: Poultry Science
https://www.readbyqxmd.com/read/28431030/using-multivariate-base-rates-to-interpret-low-scores-on-an-abbreviated-battery-of-the-delis-kaplan-executive-function-system
#13
Justin E Karr, Mauricio A Garcia-Barrera, James A Holdnack, Grant L Iverson
Objective: Executive function consists of multiple cognitive processes that operate as an interactive system to produce volitional goal-oriented behavior, governed in large part by frontal microstructural and physiological networks. Identification of deficits in executive function in those with neurological or psychiatric conditions can be difficult because the normal variation in executive function test scores, in healthy adults when multiple tests are used, is largely unknown. This study addresses that gap in the literature by examining the prevalence of low scores on a brief battery of executive function tests...
May 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28430780/the-importance-of-standardization-for-biodiversity-comparisons-a-case-study-using-autonomous-reef-monitoring-structures-arms-and-metabarcoding-to-measure-cryptic-diversity-on-mo-orea-coral-reefs-french-polynesia
#14
Emma Ransome, Jonathan B Geller, Molly Timmers, Matthieu Leray, Angka Mahardini, Andrianus Sembiring, Allen G Collins, Christopher P Meyer
The advancement of metabarcoding techniques, declining costs of high-throughput sequencing and development of systematic sampling devices, such as autonomous reef monitoring structures (ARMS), have provided the means to gather a vast amount of diversity data from cryptic marine communities. However, such increased capability could also lead to analytical challenges if the methods used to examine these communities across local and global scales are not standardized. Here we compare and assess the underlying biases of four ARMS field processing methods, preservation media, and current bioinformatic pipelines in evaluating diversity from cytochrome c oxidase I metabarcoding data...
2017: PloS One
https://www.readbyqxmd.com/read/28430507/beating-the-standard-sensitivity-bandwidth-limit-of-cavity-enhanced-interferometers-with-internal-squeezed-light-generation
#15
M Korobko, L Kleybolte, S Ast, H Miao, Y Chen, R Schnabel
The shot-noise limited peak sensitivity of cavity-enhanced interferometric measurement devices, such as gravitational-wave detectors, can be improved by increasing the cavity finesse, even when comparing fixed intracavity light powers. For a fixed light power inside the detector, this comes at the price of a proportional reduction in the detection bandwidth. High sensitivity over a large span of signal frequencies, however, is essential for astronomical observations. It is possible to overcome this standard sensitivity-bandwidth limit using nonclassical correlations in the light field...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430419/prediction-of-hydrolysis-products-of-organic-chemicals-under-environmental-ph-conditions
#16
Caroline Tebes-Stevens, Jay M Patel, W Jack Jones, Eric J Weber
Cheminformatics-based software tools can predict the molecular structure of transformation products using a library of transformation reaction schemes. This paper presents the development of such a library for abiotic hydrolysis of organic chemicals under environmentally relevant conditions. The hydrolysis reaction schemes in the library encode the process science gathered from peer-reviewed literature and regulatory reports. Each scheme has been ranked on a scale of one to six based on the median half-life in a data set compiled from literature-reported hydrolysis rates...
April 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28430045/laparoscopic-sleeve-gastrectomy-changes-in-the-last-decade-differences-in-morbidity-and-weight-loss
#17
Andrea Balla, Silvia Quaresima, Frida Leonetti, Emanuela Paone, Marco Brunori, Teresa Messina, Ardit Seitaj, Alessandro M Paganini
PURPOSE: Aim is to report the learning curve and standardization process of Laparoscopic Sleeve Gastrectomy (LSG), describing the evolution in surgical technique and patient management in the authors' experiences. METHODS: One hundred twenty-seven patients were divided in three Groups (A, B, and C), based on bougie size and technical details, and included 36, 46, and 45 patients, respectively. RESULTS: Mean operative time in Groups A, B, and C was 201...
April 21, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28429642/selected-weight-management-interventions-for-military-populations-in-the-united-states-a-narrative-report
#18
Jessica Murray, Basil H Aboul-Enein, Joshua Bernstein, Joanna Kruk
Overweight and obesity continues to be a significant public health burden in the US and particularly among military personnel. Although the US Department of Defense mandates standardized physical activity requirements for military members, incidence and prevalence of overweight and obesity among military personnel continue to increase. Each military department controls their own interventional strategies for physical fitness and weight control. However, unique challenges such as geographic transients, lack of central standardization and empirical efficacy data across military departments, and chronic stress associated with military service adversely affect program outcomes...
January 1, 2017: Nutrition and Health
https://www.readbyqxmd.com/read/28429609/chemical-evaluation-of-the-rhynchophorus-ferrugineus-larvae-fed-on-different-substrates-as-human-food-source
#19
Annarita Cito, Santi Longo, Giuseppe Mazza, Elena Dreassi, Valeria Francardi
We investigated the chemical composition of the weevil Rhynchophorus ferrugineus larvae, traditionally used as human food in Asia and known worldwide as one of the most significant pest for palm trees. Total fat content and fatty acid composition were analyzed using standard methodologies in (1) weevil larvae reared on apple fruit slices and wild specimens collected from attacked (2) Phoenix canariensis and (3) Syagrus romanzoffiana palm trees. Total fat content was extremely high in all the specimens (ranged between 57...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28429554/is-there-a-practical-role-for-bone-biopsy-in-chronic-kidney-disease
#20
Terrence Diamond, Grahame J Elder
Bone biopsy is currently the only means to accurately assess renal osteodystrophy and responses to therapeutic interventions. With sedation, the technique is relatively painless, and complications are uncommon. Bone biopsy should be considered when the aetiology of symptoms or biochemical abnormalities is in question, and results may lead to changes in therapy. Although it remains prudent to use antiresorptive drugs cautiously in patients with chronic kidney disease (CKD) stages 3a-4 and low bone mineral density, bone biopsy may not be warranted before commencing therapy in these patients...
March 2017: Nephrology
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