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https://www.readbyqxmd.com/read/28820287/comparison-of-pet-and-ct-radiomics-for-prediction-of-local-tumor-control-in-head-and-neck-squamous-cell-carcinoma
#1
Marta Bogowicz, Oliver Riesterer, Luisa Sabrina Stark, Gabriela Studer, Jan Unkelbach, Matthias Guckenberger, Stephanie Tanadini-Lang
PURPOSE: An association between radiomic features extracted from CT and local tumor control in the head and neck squamous cell carcinoma (HNSCC) has been shown. This study investigated the value of pretreatment functional imaging (18F-FDG PET) radiomics for modeling of local tumor control. MATERIAL AND METHODS: Data from HNSCC patients (n = 121) treated with definitive radiochemotherapy were used for model training. In total, 569 radiomic features were extracted from both contrast-enhanced CT and 18F-FDG PET images in the primary tumor region...
August 18, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28814040/training-wrist-extensor-function-and-detecting-unwanted-movement-strategies-in-an-emg-controlled-visuomotor-task
#2
Mingxing Lyu, Charles Lambelet, Daniel Woolley, Xue Zhang, Weihai Chen, Xilun Ding, Roger Gassert, Nicole Wenderoth
Stroke patients often suffer from severe upper limb paresis. Rehabilitation treatment typically targets motor impairments as early as possible, however, muscular contractions, particularly in the wrist and fingers, are often too weak to produce overt movements, making the initial phase of rehabilitation training difficult. Here we propose a new training tool whereby electromyographic (EMG) activity is measured in the wrist extensors and serves as a proxy of voluntary corticomotor drive. We used the Myo armband to develop a proportional EMG controller which allowed volunteers to perform a simple visuomotor task by modulating wrist extensor activity...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28811508/discrimination-of-plant-root-zone-water-status-in-greenhouse-production-based-on-phenotyping-and-machine-learning-techniques
#3
Doudou Guo, Jiaxiang Juan, Liying Chang, Jingjin Zhang, Danfeng Huang
Plant-based sensing on water stress can provide sensitive and direct reference for precision irrigation system in greenhouse. However, plant information acquisition, interpretation, and systematical application remain insufficient. This study developed a discrimination method for plant root zone water status in greenhouse by integrating phenotyping and machine learning techniques. Pakchoi plants were used and treated by three root zone moisture levels, 40%, 60%, and 80% relative water content. Three classification models, Random Forest (RF), Neural Network (NN), and Support Vector Machine (SVM) were developed and validated in different scenarios with overall accuracy over 90% for all...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28772091/riding-high-into-the-danger-zone-a-review-of-potential-differences-in-chemical-exposures-in-fighter-pilots-resulting-from-high-altitude-and-g-forces
#4
Matthew W Linakis, Kathleen M Job, Xiaoxi Liu, Scott C Collingwood, Heather A Pangburn, Darrin K Ott, Catherine M T Sherwin
When in flight, pilots of high performance aircraft experience conditions unique to their profession. Training flights, performed as often as several times a week, can expose these pilots to altitudes in excess of 15 km (~50,000 ft, with a cabin pressurized to an altitude of ~20,000 ft), and the maneuvers performed in flight can exacerbate the G-forces felt by the pilot. While the pilots specifically train to withstand these extreme conditions, the physiologic stress could very likely lead to differences in the disposition of chemicals in the body, and consequently, dangerously high exposures...
August 3, 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/28769833/possession-zone-as-a-performance-indicator-in-football-the-game-of-the-best-teams
#5
Claudio A Casal, Rubén Maneiro, Toni Ardá, Francisco J Marí, José L Losada
Possession time in football has been widely discussed in research but few studies have analyzed the importance of the field area in which possession occurs. The objective of this study was to identify the existence of significant differences in the field zone of ball possession between successful and unsuccessful teams and to acknowledge if the match status modulates the possession model. To this end, 2,284 attacks were analyzed corresponding to the matches in the final phase of the UEFA Euro 2016 France, recording possession time and field zone in which possession occurred...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28766395/dual-loyalties-everyday-ethical-problems-of-registered-nurses-and-physicians-in-combat-zones
#6
Kristina Lundberg, Sofia Kjellström, Lars Sandman
BACKGROUND: When healthcare personnel take part in military operations in combat zones, they experience ethical problems related to dual loyalties, that is, when they find themselves torn between expectations of doing caring and military tasks, respectively. AIM: This article aims to describe how Swedish healthcare personnel reason concerning everyday ethical problems related to dual loyalties between care and military tasks when undertaking healthcare in combat zones...
January 1, 2017: Nursing Ethics
https://www.readbyqxmd.com/read/28756201/multiple-mild-traumatic-brain-injury-in-the-rat-produces-persistent-pathological-alterations-in-the-brain
#7
Diane M Brooks, Sarjubhai A Patel, Eric D Wohlgehagen, Erin O Semmens, Alan Pearce, Edmond A Sorich, Thomas F Rau
Multiple mild traumatic brain injury (mmTBI), in certain cases, produces persistent symptoms. However, the molecular mechanisms underlying these symptoms remain unclear. Here, we demonstrate extended pathological changes in the rat brain following mmTBI. Using the lateral fluid percussion (LFP) technique we exposed adult male Wistar rats to a mild TBI (mTBI) once a week for four weeks and compared them to surgical shams. At 90days following the last TBI or sham procedure the animals were cognitively tested in the Morris Water Maze (MWM), euthanized, and the brains removed for immunohistochemistry...
July 27, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28752837/an-international-comparison-of-retinopathy-of-prematurity-grading-performance-within-the-benefits-of-oxygen-saturation-targeting-ii-trials
#8
B W Fleck, C Williams, E Juszczak, K Cocker, B J Stenson, B A Darlow, S Dai, G A Gole, G E Quinn, D K Wallace, A Ells, S Carden, L Butler, D Clark, J Elder, C Wilson, S Biswas, A Shafiq, A King, P Brocklehurst, A R Fielder
PurposeTo investigate whether the observed international differences in retinopathy of prematurity (ROP) treatment rates within the Benefits of Oxygen Saturation Targeting (BOOST) II trials might have been caused by international variation in ROP disease grading.MethodsGroups of BOOST II trial ophthalmologists in UK, Australia, and New Zealand (ANZ), and an international reference group (INT) used a web based system to grade a selection of RetCam images of ROP acquired during the BOOST II UK trial. Rates of decisions to treat, plus disease grading, ROP stage grading, ROP zone grading, inter-observer variation within groups and intra-observer variation within groups were measured...
July 28, 2017: Eye
https://www.readbyqxmd.com/read/28745474/the-use-of-metabolic-power-to-assess-physical-demands-in-soccer-how-does-it-differ-from-the-traditional-approach-through-speed-running
#9
Francisco I Martínez-Cabrera, Francisco J Núñez-Sánchez
BACKGROUND: Metabolic power and speed running are in the top-10-ranked variables used to quantify the physical demand in soccer matches or training practices. The purpose of this study were 1) to compare metabolic power (MP) and the traditional approach using speed running during soccer matches in absolute values and 2) in zones of intensity in function of the playing positions. METHODS: Thirty-eight professional soccer players were analysed during 18 friendly matches from 4 preseasons (n=300) and divided into 5 groups of playing positions: central defender (CD) (n=64), wide defender (WD) (n=55), central midfielder (CM) (n=58), wide attacker (WA) (n=70) and attacker (AT) (n=53)...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28737587/the-influence-of-tactical-and-situational-variables-on-offensive-sequences-during-elite-football-matches
#10
Hugo Sarmento, António Figueiredo, Carlos Lago-Peñas, Zoran Milanovic, António Barbosa, Pedro Tadeu, Paul S Bradley
This study examined the influence of tactical and situational variables on offensive sequences during elite football matches. A sample of 68 games and 1694 offensive sequences from the Spanish La Liga, Italian Serie A, German Bundesliga, English Premier League and Champions League were analysed using chi-square and logistic regression analyses. Results revealed that counterattacks (OR=1.44; 95% CI: 1.13 to 1.83; P<0.01) and fast attacks (OR=1.43; 95% CI: 1.11 to 1.85; P<0.01) increased the success of an offensive sequence by 40% compared with positional attacks...
July 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28731534/internal-quality-control-in-an-academic-cytopathology-laboratory-for-the-introduction-of-a-new-reporting-system-for-endometrial-cytology
#11
Niki Margari, Abraham Pouliakis, Dionysios Aninos, Christos Meristoudis, Magdalini Stamataki, Ioannis Panayiotides, Petros Karakitsos
BACKGROUND: To evaluate reproducibility of a reporting system for endometrial cytology. METHODS: Cytologic slides from 49 patients, prepared via liquid based cytology, were blindly examined by five cytopathologists of various experience levels, applying a recently introduced reporting system as previously reported. The agreement among cytopathologists was evaluated via Kappa (κ) statistics and the Kendall's Coefficient of Variation (W); cytologic results were compared with the relevant histologic report...
July 21, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28723819/exploring-game-dynamics-in-padel-implications-for-assessment-and-training
#12
Javier Courel-Ibáñez, Bernardino J Sánchez-Alcaraz Martinez, Diego Muñoz Marín
A better understanding of in-game competition demands potentially improves coaching strategy and quality. However, there is very limited information about game patterns in padel, a very modern racket sport born in the 70'. The purpose of this study was therefore to quantify and classify game dynamics during the match in professional padel players through a multivariate decision tree approach including technical, spatial and effectiveness indicators. The results determined three main game styles strongly defined by the court zone (net, middle and baseline)...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28719491/greater-effect-of-east-vs-west-travel-on-jet-lag-sleep-and-team-sport-performance
#13
Peter M Fowler, Wade Knez, Stephen Crowcroft, Amy E Mendham, Joanna Miller, Charlie Sargent, Shona Halson, Rob Duffield
PURPOSE: Determine the recovery timeline of sleep, subjective jet-lag and fatigue, and team-sport physical performance following east and west long-haul travel. METHODS: Ten, physically-trained males underwent testing at 09:00 (AM) and 17:00 (PM) local time on four consecutive days two weeks prior to outbound travel (BASE), and the first four days following 21 h of outbound (WEST) and return (EAST) air travel across eight time-zones between Australia and Qatar. Data collection included performance (countermovement jump [CMJ], 20-m sprint and Yo-Yo Intermittent Recovery level 1 [YYIR1] test) and perceptual (jet-lag, motivation, perceived exertion and physical feeling) measures...
July 17, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28713762/comparison-of-the-shaping-ability-of-waveone-reciprocating-files-with-or-without-glide-path-in-simulated-curved-s-shaped-root-canals
#14
Ayca Yilmaz, Enver Sedat Kucukay, Murat Istektepe, Selen Nihal Sisli, Handan Ersev, Isil Karagoz-Kucukay
OBJECTIVES: The aim was to compare the shaping ability of WaveOne reciprocating files with or without glide path in simulated curved S-shaped root canals. MATERIALS AND METHODS: Forty ISO #15, 0.02 taper, clear resin Endo Training Bloc-S blocks were studied. The simulated curved S-shaped canals were dyed using ink, preinstrumentation images were scanned, and resin blocks were prepared and divided into Group A: PathFile and WaveOne and Group B: WaveOne. All canals were postoperatively scanned...
June 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28713464/a-rapidly-incremented-tethered-swimming-test-for-defining-domain-specific-training-zones
#15
Dalton M Pessôa Filho, Leandro O C Siqueira, Astor R Simionato, Mário A C Espada, Daniel S Pestana, Fred J DiMenna
The purpose of this study was to investigate whether a tethered-swimming incremental test comprising small increases in resistive force applied every 60 seconds could delineate the isocapnic region during rapidly-incremented exercise. Sixteen competitive swimmers (male, n = 11; female, n = 5) performed: (a) a test to determine highest force during 30 seconds of all-out tethered swimming (Favg) and the ΔF, which represented the difference between Favg and the force required to maintain body alignment (Fbase), and (b) an incremental test beginning with 60 seconds of tethered swimming against a load that exceeded Fbase by 30% of ΔF followed by increments of 5% of ΔF every 60 seconds...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28708868/dynamics-of-tactical-behaviour-in-association-football-when-manipulating-players-space-of-interaction
#16
Angel Ric, Carlota Torrents, Bruno Gonçalves, Lorena Torres-Ronda, Jaime Sampaio, Robert Hristovski
The analysis of positional data in association football allows the spatial distribution of players during matches to be described in order to improve the understanding of tactical-related constraints on the behavioural dynamics of players. The aim of this study was to identify how players' spatial restrictions affected the exploratory tactical behaviour and constrained the perceptual-motor workspace of players in possession of the ball, as well as inter-player passing interactions. Nineteen professional outfield male players were divided into two teams of 10 and 9 players, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28708825/lymphatic-filariasis-patient-identification-in-a-large-urban-area-of-tanzania-an-application-of-a-community-led-mhealth-system
#17
Upendo Mwingira, Maria Chikawe, Wilfred Lazarus Mandara, Hayley E Mableson, Cecilia Uisso, Irene Mremi, Alpha Malishee, Mwele Malecela, Charles D Mackenzie, Louise A Kelly-Hope, Michelle C Stanton
BACKGROUND: Lymphatic filariasis (LF) is best known for the disabling and disfiguring clinical conditions that infected patients can develop; providing care for these individuals is a major goal of the Global Programme to Eliminate LF. Methods of locating these patients, knowing their true number and thus providing care for them, remains a challenge for national medical systems, particularly when the endemic zone is a large urban area. METHODOLOGY/PRINCIPLE FINDINGS: A health community-led door-to-door survey approach using the SMS reporting tool MeasureSMS-Morbidity was used to rapidly collate and monitor data on LF patients in real-time (location, sex, age, clinical condition) in Dar es Salaam, Tanzania...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28705145/texture-based-classification-of-different-single-liver-lesion-based-on-spair-t2w-mri-images
#18
Zhenjiang Li, Yu Mao, Wei Huang, Hongsheng Li, Jian Zhu, Wanhu Li, Baosheng Li
BACKGROUND: To assess the feasibility of texture analysis (TA) based on spectral attenuated inversion-recovery T2 weighted magnetic resonance imaging (SPAIR T2W-MRI) for the classification of hepatic hemangioma (HH), hepatic metastases (HM) and hepatocellular carcinoma (HCC). METHODS: The SPAIR T2W-MRI data of 162 patients with HH (n=55), HM (n=67) and HCC (n=40) were retrospectively analyzed. We used two independent cohorts for training (n = 112 patients) and validation (n = 50 patients)...
July 13, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28699924/position-specific-acceleration-and-deceleration-profiles-in-elite-youth-and-senior-soccer-players
#19
Jeppe F Vigh-Larsen, Ulrik Dalgas, Thomas B Andersen
The purpose of the study was to characterize and compare the position specific activity profiles of young and senior elite soccer players with special emphasis put on accelerations and decelerations. Eight professional senior matches were tracked using the ZXY tracking system and analyzed for number of accelerations and decelerations and running distances within different speed zones. Likewise, four U19- and five U17 matches were analyzed for comparison between youth and senior players. In senior players the total distance (TD) was 10776±107 m with 668±28 and 143±10 m being high-intensity running (HIR) and sprinting, respectively...
April 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28693501/knowledge-and-practice-of-immediate-newborn-care-among-health-care-providers-in-eastern-zone-public-health-facilities-tigray-ethiopia-2016
#20
Abadi Kidanemariam Berhe, Fitiwi Tinsae, Gebremedhin Gebreegziabher
BACKGROUND: According to WHO (2013) report the number of under five-year mortality in Ethiopia was 195,504, out of this 84,437 was from neonatal death and this mortality is related to immediate obstetric and newborn care of babies provided by health care providers; But little was known about the level of knowledge and practice related to immediate newborn care and their associated factors among health care providers generally in Tigray region and specifically in the Eastern Zone so the aim of this study was to assess knowledge and practice of immediate newborn care and associated factors among health care providers in the Eastern zone public health facilities, Tigray, Ethiopia...
July 11, 2017: BMC Pediatrics
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