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https://www.readbyqxmd.com/read/29238250/influence-of-tennis-racquet-kinematics-on-ball-topspin-angular-velocity-and-accuracy-during-the-forehand-groundstroke
#1
Sunku Kwon, Robin Pfister, Ronald L Hager, Iain Hunter, Matthew K Seeley
Forehand groundstroke effectiveness is important for tennis success. Ball topspin angular velocity (TAV) and accuracy are important for forehand groundstroke effectiveness, and have been extensively studied, previously; despite previous, quality studies, it was unclear whether certain racquet kinematics relate to ball TAV and shot accuracy during the forehand groundstroke. This study evaluated potential relationships between (1) ball TAV and (2) forehand accuracy, and five measures of racquet kinematics: racquet head impact angle (i...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29237955/accelerated-hypofractionation-octa-shot-palliative-radiation-schedule-in-advanced-head-and-neck-carcinoma
#2
Shankar Lal Jakhar, Ramesh Purohit, Akankhsha Solanki, P Murali, Trupti Kothari, Neeti Sharma, Harvinder Singh Kumar
BACKGROUND: Head and neck cancers are attributed to be the most common type of malignancy in the developing countries with most cases presenting in advanced stage. This pilot study was performed to evaluate the effect of an accelerated hypofractionated 4 days schedule (octa shot) in providing palliation to such advanced cases of head and neck cancer. MATERIALS AND METHODS: Twenty-two patients with advanced (Stage VIB-IVB) squamous cell carcinoma of head and neck region were enrolled in the study...
October 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/29237044/comparison-of-molli-shmollli-and-sasha-in-discrimination-between-health-and-disease-and-relationship-with-histologically-derived-collagen-volume-fraction
#3
Nicholas Child, Gonca Suna, Darius Dabir, May-Lin Yap, Toby Rogers, Misha Kathirgamanathan, Eduardo Arroyo-Ucar, Rocio Hinojar, Islam Mahmoud, Christopher Young, Olaf Wendler, Manuel Mayr, Banher Sandhu, Geraint Morton, Marion Muhly-Reinholz, Stefanie Dimmeler, Eike Nagel, Valentina O Puntmann
Aims: To determine the bioequivalence of several T1 mapping sequences in myocardial characterization of diffuse myocardial fibrosis. Methods and results: We performed an intra-individual sequence comparison of three types of T1 mapping sequences [MOdified Look-Locker Inversion recovery (MOLLI), Shortened MOdified Look-Locker Inversion recovery ((sh)MOLLI), and SAturation recovery single-SHot Acquisition (SASHA)]. We employed two model diseases of diffuse interstitial fibrosis [patients with non-ischaemic dilated cardiomyopathy (NIDCM), n = 32] and aortic stenosis [(AS), n = 25)]...
December 11, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29230617/retrospective-review-on-the-outcome-and-safety-of-transscleral-diode-laser-cyclophotocoagulation-in-refractory-glaucoma-in-chinese-patients
#4
Janice J C Cheung, Kenneth K W Li, Samuela W K Tang
PURPOSE: Transscleral cyclodiode laser cyclophotocoagulation (TSCP) is often reserved for treatment of refractory glaucoma. This retrospective study investigates the safety and efficacy of TSCP among the Chinese population. METHODS: A retrospective review was performed on electronic patient records of all patients receiving TSCP between years 2009 to year 2016. Patient demographics, indication for laser, success and response rate, change in intraocular pressure (IOP), number of treatment sessions, laser energy, glaucoma medication, visual acuity, pain symptoms and complication rate were documented...
December 11, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29230526/peripheral-nerve-diffusion-tensor-imaging-dti-normal-values-and-demographic-determinants-in-a-cohort-of-60-healthy-individuals
#5
Moritz Kronlage, Véronique Schwehr, Daniel Schwarz, Tim Godel, Lorenz Uhlmann, Sabine Heiland, Martin Bendszus, Philipp Bäumer
OBJECTIVE: To identify demographic determinants of peripheral nerve diffusion tensor imaging (DTI) and to establish normal values for fractional anisotropy (FA), axial diffusivity (AD), radial diffusivity (RD), and mean diffusivity (MD). METHODS: Sixty subjects were examined at 3 Tesla by single-shot DTI. FA, AD, RD, and MD were collected for the sciatic, tibial, median, ulnar, and radial nerve and were correlated with demographic variables. RESULTS: Mean FA of all nerves declined with increasing age (r = -0...
December 11, 2017: European Radiology
https://www.readbyqxmd.com/read/29227439/assessment-of-masses-of-the-external-ear-with-diffusion-weighted-mr-imaging
#6
Ahmed Abdel Khalek Abdel Razek
PURPOSE: To assess masses of the external ear with diffusion-weighted MR imaging. MATERIAL AND METHODS: Retrospective analysis of 43 consecutive patients with soft tissue mass of the external ear. They underwent single shot diffusion-weighted MR imaging of the ear. The apparent diffusion coefficient (ADC) value of the mass of the external ear was calculated. The final diagnosis was performed by biopsy. The ADC value correlated with the biopsy results. RESULTS: The mean ADC value of malignancy (=27) of external ear (0...
December 7, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29225413/outbreak-of-hospital-infection-from-biofilm-embedded-pan-drug-resistant-pseudomonas-aeroginosa-due-to-a-contaminated-bronchoscope
#7
Nader Alipour, Alper Karagoz, Abbas Taner, Nasrin Gaeini, Nastaran Alipour, Hassan Zeytin, Fatih Yildiz, Riza Durmaz
Background: Colistin-resistant Pseudomonas aeruginosa (P. aeruginosa) has been defined as pandrug-resistant (PDR) strain. Outbreaks of PDR P. aeruginosa especially in pulmonary tract infections due to contaminated bronchoscopes have rarely been reported. The emergence of pandrug-resistant strains in both CF (Cystic Fibrosis) and non-CF clinical isolates over recent years remains of a great concern. Hospital wards contaminated with PDR P. aeruginosa infection, must be shot down until their eradication...
2017: Tap Chi y Hoc du Phong, Journal of Preventive Medicine / Hoi y Hoc du Phong Viet Nam
https://www.readbyqxmd.com/read/29222183/default-neglect-in-attempts-at-social-influence
#8
Julian J Zlatev, David P Daniels, Hajin Kim, Margaret A Neale
Current theories suggest that people understand how to exploit common biases to influence others. However, these predictions have received little empirical attention. We consider a widely studied bias with special policy relevance: the default effect, which is the tendency to choose whichever option is the status quo. We asked participants (including managers, law/business/medical students, and US adults) to nudge others toward selecting a target option by choosing whether to present that target option as the default...
December 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29219935/intrathecal-morphine-for-laparoscopic-segmental-colonic-resection-as-part-of-an-enhanced-recovery-protocol-a-randomized-controlled-trial
#9
Mark V Koning, Aart Jan W Teunissen, Erwin van der Harst, Elisabeth J Ruijgrok, Robert Jan Stolker
BACKGROUND AND OBJECTIVES: Management of postoperative pain after laparoscopic segmental colonic resections remains controversial. We compared 2 methods of analgesia within an Enhanced Recovery After Surgery (ERAS) program. The goal of the study was to investigate whether administration of intrathecal bupivacaine/morphine would lead to an enhanced recovery. METHODS: A single-center, randomized, double-blind controlled trial was performed (NL43488.101.13). Patients scheduled for laparoscopic segmental intestinal resections were considered...
December 6, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29211505/the-effect-of-dietary-nitrate-on-nocturnal-sleep-disordered-breathing-and-arterial-oxygen-desaturation-at-high-altitude
#10
Alexander Patrician, Harald Engan, David Lundsten, Ludger Grote, Helena Vigetun-Haughey, Erika Schagatay
Patrician, Alexander, Harald Engan, David Lundsten, Ludger Grote, Helena Vigetun-Haughey, and Erika Schagatay. The effect of dietary nitrate on nocturnal sleep-disordered breathing and arterial oxygen desaturation at high altitude. High Alt Med Biol 00:000-000, 2017.-Sleep-disordered breathing and fluctuations in arterial oxygen saturation (SaO2) are common during sleep among lowlanders ascending to high altitude. Dietary nitrate (NO3-) supplementation has been shown to lower the O2 consumption in various conditions...
December 6, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29206824/-approach-to-percutaneous-nephrolithotomy-comparison-of-the-procedure-in-a-one-shot-versus-the-sequential-with-metal-dilata
#11
Ismael Sedano-Portillo, Gastón Ochoa-León, Clotilde Fuentes-Orozco, Leire Irusteta-Jiménez, Luis Rodrigo Michel-Espinoza, Marcela Salazar-Parra, Lizbeth Cuesta-Márquez, Alejandro González-Ojeda
INTRODUCTION: Percutaneous nephrolithotomy is an efficient approach for treatment of different types of kidney stones. Various types of access techniques have been described like sequential dilatation and one-shot procedure. OBJECTIVE: To determine the differences in time of exposure to X-rays and hemoglobin levels between techniques. METHODS: Controlled clinical trial. Patients older than 18 years with complex/uncomplicated kidney stones, without urine infection were included...
November 2017: Gaceta Médica de México
https://www.readbyqxmd.com/read/29204497/decreased-risk-of-knee-buckling-with-adductor-canal-block-versus-femoral-nerve-block-in-total-knee-arthroplasty-a-retrospective-cohort-study
#12
Ryan R Thacher, Thomas R Hickernell, Matthew J Grosso, Roshan Shah, Herbert J Cooper, Robert Maniker, Anthony Robin Brown, Jeffrey Geller
Background: Femoral nerve (FNB) and adductor canal blocks (ACB) are used in the setting of total knee arthroplasty (TKA), but neither has been demonstrated to be clearly superior. Although dynamometer studies have shown ACBs spare perioperative quadriceps function when compared to FNBs, ACBs have been widely adopted in orthopaedic surgery without significant evidence that they decrease the risk of perioperative falls. Methods: All patients who received single-shot FNB (129 patients) or ACB (150 patients) at our institution for unilateral primary TKA from April 2014 to September 2015 were retrospectively reviewed for perioperative falls or near-falls during physical therapy and inpatient care...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29202338/cranial-trauma-in-handgun-executions-experimental-data-using-polyurethane-proxies
#13
Seth C Taylor, Elena F Kranioti
Gun violence is a global phenomenon with regional variation in frequency and severity. Handguns are often used in violent deaths such as suicides and homicides. Hence, ballistic trauma is a critical subject of forensic investigations. Trauma patterns are fundamental evidence for the reconstruction of the incident and for the determination of the manner of death. This study investigated the differences in trauma patterns with a series of experiments using six different calibers (.22 LR, .38 Special, .380 ACP, 9×19mm, ...
November 27, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29195423/evaluation-of-an-experimental-electrohydraulic-discharge-device-for-extracorporeal-shock-wave-lithotripsy-pressure-field-of-sparker-array
#14
Guangyan Li, Bret A Connors, Ray B Schaefer, John J Gallagher, Andrew P Evan
In this paper, an extracorporeal shock wave source composed of small ellipsoidal sparker units is described. The sparker units were arranged in an array designed to produce a coherent shock wave of sufficient strength to fracture kidney stones. The objective of this paper was to measure the acoustical output of this array of 18 individual sparker units and compare this array to commercial lithotripters. Representative waveforms acquired with a fiber-optic probe hydrophone at the geometric focus of the sparker array indicated that the sparker array produces a shock wave (P+ ∼40-47 MPa, P- ∼2...
November 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29194738/cardiac-mr-elastography-using-reduced-fov-single-shot-spin-echo-epi
#15
Yi Sui, Shivaram Poigai Arunachalam, Arvin Arani, Joshua D Trzasko, Phillip M Young, James F Glockner, Kevin J Glaser, David S Lake, Kiaran P McGee, Armando Manduca, Phillip J Rossman, Richard L Ehman, Philip A Araoz
PURPOSE: To implement a reduced field of view (rFOV) technique for cardiac MR elastography (MRE) and to demonstrate the improvement in image quality of both magnitude images and post-processed MRE stiffness maps compared to the conventional full field of view (full-FOV) acquisition. METHODS: With Institutional Review Board approval, 17 healthy volunteers underwent both full-FOV and rFOV cardiac MRE scans using 140-Hz vibrations. Two cardiac radiologists blindly compared the magnitude images and stiffness maps and graded the images based on several image quality attributes using a 5-point ordinal scale...
December 1, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29192189/single-shot-structural-analysis-by-high-energy-x-ray-diffraction-using-an-ultrashort-all-optical-source
#16
R Rakowski, G Golovin, J O'Neal, J Zhang, P Zhang, B Zhao, M D Wilson, M C Veale, P Seller, S Chen, S Banerjee, D Umstadter, M Fuchs
High-energy X-rays (HEX-rays) with photon energies on order of 100 keV have attractive characteristics, such as comparably low absorption, high spatial resolution and the ability to access inner-shell states of heavy atoms. These properties are advantageous for many applications ranging from studies of bulk materials to the investigation of materials in extreme conditions. Ultrafast X-ray diffraction allows the direct imaging of atomic dynamics simultaneously on its natural time and length scale. However, using HEX-rays for ultrafast studies has been limited due to the lack of sources that can generate pulses of sufficiently short (femtosecond) duration in this wavelength range...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29191206/optimized-cest-cardiovascular-magnetic-resonance-for-assessment-of-metabolic-activity-in-the-heart
#17
Zhengwei Zhou, Christopher Nguyen, Yuhua Chen, Jaime L Shaw, Zixin Deng, Yibin Xie, James Dawkins, Eduardo Marbán, Debiao Li
BACKGROUND: Previous studies have linked cardiac dysfunction to loss of metabolites in the creatine kinase system. Chemical exchange saturation transfer (CEST) is a promising metabolic cardiovascular magnetic resonance (CMR) imaging technique and has been applied in the heart for creatine mapping. However, current limitations include: (a) long scan time, (b) residual cardiac and respiratory motion, and (c) B0 field variations induced by respiratory motion. An improved CEST CMR technique was developed to address these problems...
November 30, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29189781/observation-of-a-many-body-dynamical-phase-transition-with-a-53-qubit-quantum-simulator
#18
J Zhang, G Pagano, P W Hess, A Kyprianidis, P Becker, H Kaplan, A V Gorshkov, Z-X Gong, C Monroe
A quantum simulator is a type of quantum computer that controls the interactions between quantum bits (or qubits) in a way that can be mapped to certain quantum many-body problems. As it becomes possible to exert more control over larger numbers of qubits, such simulators will be able to tackle a wider range of problems, such as materials design and molecular modelling, with the ultimate limit being a universal quantum computer that can solve general classes of hard problems. Here we use a quantum simulator composed of up to 53 qubits to study non-equilibrium dynamics in the transverse-field Ising model with long-range interactions...
November 29, 2017: Nature
https://www.readbyqxmd.com/read/29170697/effects-of-flexibility-and-balance-on-driving-distance-and-club-head-speed-in-collegiate-golfers
#19
Kelsey J Marshall, Tamra L Llewellyn
Good balance, flexibility, and strength are all required to maintain a steady stance during the kinematic chain to produce successful golf shots. When the body can produce more power, more club head speed is generated. This formation of power translates into greater distance and accuracy. Athletes today are seeking exercise programs to enhance these qualities of their golf swing. The purpose of this study is to investigate the correlations between flexibility and balance with club head speed and driving distance in the golf swing of male and female collegiate golfers...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29165902/multi-contrast-endomyocardial-imaging-by-single-channel-high-resolution-cross-polarization-optical-coherence-tomography
#20
Xinwen Yao, Yu Gan, Yuye Ling, Charles C Marboe, Christine P Hendon
A single-channel high-resolution cross-polarization (CP) optical coherence tomography (OCT) system is presented for multi-contrast imaging of human myocardium in one-shot measurement. The intensity contrast and functional contrasts, including the ratio between the cross- and co- polarization channels as well as the cumulative retardation, are reconstructed from the CP-OCT readout. By comparing the CP-OCT results with histological analysis, it is shown that the system can successfully delineate micro-structures in the myocardium and differentiate the fibrotic myocardium from normal or ablated myocardium based the functional contrasts provided by the CP-OCT system...
November 22, 2017: Journal of Biophotonics
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