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https://www.readbyqxmd.com/read/28087266/assessment-of-sex-differences-in-body-composition-among-adolescents-with-anorexia-nervosa
#1
Jason M Nagata, Neville H Golden, Rebecka Peebles, Jin Long, Stuart B Murray, Mary B Leonard, Jennifer L Carlson
PURPOSE: To compare deficits in fat mass (FM) and lean body mass (LM) among male and female adolescents with anorexia nervosa (AN) and to identify other covariates associated with body composition. METHODS: We retrospectively reviewed electronic medical records of all subjects aged 9-20 years with a Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition diagnosis of AN and dual-energy x-ray absorptiometry scans after initial evaluation at Stanford between March 1997 and February 2011...
January 11, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28081050/white-paper-of-the-society-of-computed-body-tomography-and-magnetic-resonance-on-dual-energy-ct-part-3-vascular-cardiac-pulmonary-and-musculoskeletal-applications
#2
Carlo N De Cecco, U Joseph Schoepf, Lynne Steinbach, Daniel T Boll, W Dennis Foley, Ravi K Kaza, David N Bolus, Desiree E Morgan, Dushyant V Sahani, William P Shuman, Marilyn J Siegel, Terri J Vrtiska, Benjamin M Yeh, Lincoln L Berland
This is the third of a series of 4 white papers that represent Expert Consensus Documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its Task Force on dual-energy computed tomography. This paper, part 3, describes computed tomography angiography and thoracic, cardiac, vascular, and musculoskeletal clinical applications. At the end of the discussion of each application category (vascular, cardiac, pulmonary, and musculoskeletal), we present our consensus opinions on the current clinical utility of the application and opportunities for further research...
January 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28080065/level-spectrum-and-charge-relaxation-in-a-silicon-double-quantum-dot-probed-by-dual-gate-reflectometry
#3
Alessandro Crippa, Romain Maurand, Dharmraj Kotekar-Patil, Andrea Corna, Heorhii Bohuslavskyi, Alexei O Orlov, Patrick Fay, Romain Laviéville, Sylvain Barraud, Maud Vinet, Marc Sanquer, Silvano De Franceschi, Xavier Jehl
We report on dual-gate reflectometry in a metal-oxide-semiconductor double-gate silicon transistor operating at low temperature as a double quantum dot device. The reflectometry setup consists of two radio frequency resonators respectively connected to the two gate electrodes. By simultaneously measuring their dispersive responses, we obtain the complete charge stability diagram of the device. Electron transitions between the two quantum dots and between each quantum dot and either the source or the drain contact are detected through phase shifts in the reflected radio frequency signals...
January 12, 2017: Nano Letters
https://www.readbyqxmd.com/read/28079827/differentiating-malignant-from-benign-gastric-mucosal-lesions-with-quantitative-analysis-in-dual-energy-spectral-computed-tomography-initial-experience
#4
Xiaoyan Meng, Cheng Ni, Yaqi Shen, Xuemei Hu, Xiao Chen, Zhen Li, Daoyu Hu
To investigate the value of quantitative analysis in dual energy spectral computed tomography (DESCT) for differentiating malignant gastric mucosal lesions from benign gastric mucosal lesions (including gastric inflammation [GI] and normal gastric mucosa [NGM]). This study was approved by the ethics committee, and all patients provided written informed consent. A total of 161 consecutive patients (63 with gastric cancer [GC], 48 with GI, and 50 with NGM) who underwent dual-phase contrast enhanced DESCT scans in the arterial phase (AP) and portal venous phase (PVP) were included in this study...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28078338/dual-physically-crosslinked-double-network-hydrogels-with-high-toughness-and-self-healing-properties
#5
Xuefeng Li, Qian Yang, Youjiao Zhao, Shijun Long, Jie Zheng
Toughness and self-healing properties are desirable characteristics in engineered hydrogels used for many practical applications. However, it is still challenging to develop hydrogels exhibiting both of these attractive properties in a single material. In this work, we present the fabrication of fully physically-linked Agar/PAAc-Fe(3+) DN gels. These hydrogels exhibited dual physical crosslinking through a hydrogen bonded crosslinked agar network firstly, and a physically linked PAAc-Fe(3+) network via Fe(3+) coordination interactions secondly...
January 12, 2017: Soft Matter
https://www.readbyqxmd.com/read/28077378/peripheral-skeleton-bone-strength-is-positively-correlated-with-total-and-dairy-protein-intakes-in-healthy-postmenopausal-women
#6
Claire Durosier-Izart, Emmanuel Biver, Fanny Merminod, Bert van Rietbergen, Thierry Chevalley, François R Herrmann, Serge L Ferrari, René Rizzoli
BACKGROUND: Bone mineral content (BMC) and bone mineral density (BMD) are positively correlated with dietary protein intakes, which account for 1-8% of BMC and BMD variances. However, the relation between bone strength and microstructure, which are variables that are not captured by areal bone mineral density (aBMD), and dietary protein intakes, particularly from specific dietary sources, has not been clearly established. OBJECTIVE: We investigated the association between the peripheral skeleton-predicted failure load and stiffness, bone microstructure, and dietary protein intakes from various origins (animal, divided into dairy and nondairy, and vegetable origins) in healthy postmenopausal women...
January 11, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28077069/a-pilot-study-of-brisk-walking-in-sedentary-combination-antiretroviral-treatement-cart-treated-patients-benefit-on-soluble-and-cell-inflammatory-markers
#7
Matteo Bonato, Laura Galli, Laura Passeri, Valeria Longo, Gaspare Pavei, Simona Bossolasco, Cecilia Bertocchi, Massimo Cernuschi, Giuseppe Balconi, Giampiero Merati, Adriano Lazzarin, Antonio La Torre, Paola Cinque
BACKGROUND: Chronic HIV infection is associated with low-level inflammation and increased risk of chronic diseases and mortality. The objective was to assess the effects of moderate intensity exercise on metabolic and inflammatory markers in HIV-infected treated persons. METHODS: This was a pilot study enrolling cART-treated, sedentary persons with metabolic complications in a 12-week protocol, consisting of three sessions per week of 60 min brisk walking with (strength-walk group) or without (walk group) 30 min circuit-training...
January 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28077016/bone-mineral-density-is-close-to-normal-for-age-in-long-term-lymphoma-survivors-treated-with-high-dose-therapy-with-autologous-stem-cell-transplantation
#8
Mette Seland, Knut B Smeland, Trine Bjøro, Ragnhild S Falk, Sophie D Fosså, Clara G Gjesdal, Kristin Godang, Harald Holte, Johan Svartberg, Unni Syversen, Jens Bollerslev, Cecilie E Kiserud
BACKGROUND: Few studies have assessed bone health in lymphoma survivors treated with high-dose therapy with autologous stem cell transplantation (HDT-ASCT). Therefore, we aimed to assess bone mineral density (BMD) at six different skeletal sites and to investigate associations between clinical factors and BMD in these survivors. MATERIAL AND METHODS: Eligible lymphoma survivors were aged ≥18 years at diagnosis and at HDT-ASCT given between 1987 and 2008. Participants responded to questionnaires, blood samples were drawn, and a dual energy X-ray absorptiometry (DXA) was performed...
January 12, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28075606/potential-application-of-dual-energy-ct-in-gynecologic-cancer-initial-experience
#9
Ana Paula Benveniste, Silvana de Castro Faria, Gregory Broering, Dhakshina Moorthy Ganeshan, Eric P Tamm, Revathy B Iyer, Priya Bhosale
OBJECTIVE: The purpose of this article is to review the use of dual-energy CT (DECT) in the assessment of gynecologic cancer. CONCLUSION: DECT has the potential to improve diagnostic performance, may improve the ability to differentiate between simple cystic lesions and primary ovarian cancer, and may also improve the detection of musculoskeletal and liver metastases. Additional studies will be needed to determine the direction of future developments and the degree to which DECT will affect the imaging and management of gynecologic cancer...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28073268/dual-wavelength-switchable-vibronic-lasing-in-single-crystal-organic-microdisks
#10
Haiyun Dong, Chunhuan Zhang, Xianqing Lin, Zhonghao Zhou, Jiannian Yao, Yong Sheng Zhao
Wavelength switchable micro/nanoscale laser is essential to construct various ultracompact photonic devices. However, traditional semiconductors as the gain media generally provide only monochromatic laser output due to their continuous energy band structures. For luminescent conjugated molecules, the broad emission band usually contains a series of vibronic peaks, which is very helpful for extending the lasing spectrum to several different wavelengths. Here we propose a novel strategy to realize wavelength switchable lasers based on the controlled competition of dual-wavelength vibronic lasing in single-component organic microcrystals...
January 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28071868/development-and-validation-of-two-equations-based-on-anthropometry-estimating-body-fat-for-the-greek-adult-population
#11
Spyridon Kanellakis, Efstathios Skoufas, Vladlena Khudokonenko, Eftychia Apostolidou, Loukia Gerakiti, Maria-Chrysi Andrioti, Evangelia Bountouvi, Yannis Manios
OBJECTIVE: To validate anthropometric equations in the current literature predicting body fat percentage (%BF) in the Greek population, to develop and validate two anthropometric equations estimating %BF, and to compare them with the retrieved equations. METHODS: Anthropometric data from 642 Greek adults were incorporated. Dual-energy X-ray absorptiometry was used as reference method. The comparison with other equations was made using Bland-Altman analysis, intraclass correlation coefficient, and Lin's concordance correlation coefficient...
January 10, 2017: Obesity
https://www.readbyqxmd.com/read/28071718/reproducibility-and-repeatability-of-computer-tomography-based-measurement-of-abdominal-subcutaneous-and-visceral-adipose-tissues
#12
Yuan-Hao Lee, Hsing-Fen Hsiao, Hou-Ting Yang, Shih-Yi Huang, Wing P Chan
Excessive accumulation of abdominal adipose tissue is a widely recognized as a major feature of obesity, and it can be quantified by dual-energy x-ray absorptiometry (DXA). However, in a phantom study, the inter- and intra-instrument reliability of DXA remains unpredictable. Thus, we attempted to determine the precision of estimates from computer tomography-based measurements and analysis with AZE Virtual Place software. To determine the inter-rater reproducibility and intra-rater repeatability of adipose tissue area estimates, we used the automatic boundary-tracing function of the AZE Virtual Place to generate cross-sectional areas of subcutaneous and visceral adipose tissues from the abdomen of reconstructed CT images...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28071341/identification-of-novel-hits-as-highly-prospective-dual-agonists-for-mu-and-kappa-opioid-receptors-an-integrated-in-silico-approach
#13
Indrani Bera, Mrinal Vishwas Marathe, Pavan V Payghan, Nanda Ghoshal
Opioid agonists are used clinically for the treatment of acute and chronic pain, however, their clinical use is limited due to the presence of undesired side effects. Dual agonists, simultaneously targeting mu and kappa opioid receptors, show fewer side effects than that of selective agonists. In the present work, 2D- and 3D- Quantitative Structure Activity Relationship studies were performed on a series of aminomorphinan derivatives as dual agonists, using a wide range of descriptors. The aim of the study was to identify the structural requirements for the activity of these compounds towards mu and kappa opioid receptors and using the models, with best external predictability, for predicting the activities of new hits obtained from shape based virtual screening of drug like compounds from ZINC database...
January 10, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28070917/dual-energy-ct-quantitative-imaging-a-comparison-study-between-twin-beam-and-dual-source-ct-scanners
#14
Isabel P Almeida, Lotte E J R Schyns, Michel C Öllers, Wouter van Elmpt, Katia Parodi, Guillaume Landry, Frank Verhaegen
PURPOSE: To assess image quality and to quantify the accuracy of relative electron densities (ρe ) and effective atomic numbers (Zeff ) for three dual-energy computed tomography (DECT) scanners: a novel single-source split-filter (i.e., twin-beam) and two dual-source scanners. METHODS: Measurements were made with a second generation dual-source scanner at 80/140Sn kVp, a third-generation twin-beam single-source scanner at 120 kVp with gold (Au) and tin (Sn) filters, and a third-generation dual-source scanner at 90/150Sn kVp...
November 19, 2016: Medical Physics
https://www.readbyqxmd.com/read/28070843/noise-optimized-monoenergetic-post-processing-improves-visualization-of-incidental-pulmonary-embolism-in-cancer-patients-undergoing-single-pass-dual-energy-computed-tomography
#15
Jakob Weiss, Mike Notohamiprodjo, Malte Bongers, Christoph Schabel, Stefanie Mangold, Konstantin Nikolaou, Fabian Bamberg, Ahmed E Othman
PURPOSE: To evaluate noise-optimized monoenergetic postprocessing of dual-energy CT (DE-CT) on image quality in patients with incidental pulmonary embolism in single-pass portal-venous phase CT (CTpv). MATERIALS AND METHODS: 20 Consecutive patients with incidental pulmonary embolism in contrast-enhanced oncological follow-up DE-CTpv examination were included in this study. Images were acquired with a 3rd generation DE-CT system in DE mode (100/Sn150 kV) and activated tube current modulation 90 s after contrast agent administration...
January 9, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28070657/-how-to-incorporate-dual-energy-imaging-into-a-high-volume-abdominal-imaging-practice
#16
Eric P Tamm, Ott Le, Xinming Liu, Rick R Layman, Dianna D Cody, Priya R Bhosale
Dual-energy CT imaging has many potential uses in abdominal imaging. It also has unique requirements for protocol creation depending on the dual-energy scanning technique that is being utilized. It also generates several new types of images which can increase the complexity of image creation and image interpretation. The purpose of this article is to review, for rapid switching and dual-source dual-energy platforms, methods for creating dual-energy protocols, different approaches for efficiently creating dual-energy images, and an approach to navigating and using dual-energy images at the reading station all using the example of a pancreatic multiphasic protocol...
January 9, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28070260/relationship-between-bone-density-and-biochemical-markers-of-bone-among-two-groups-taking-carbamazepine-and-sodium-valproate-for-epilepsy-in-comparison-with-healthy-individuals-in-yazd
#17
Abolghasem Rahimdel, Ali Dehghan, Mahboubeh Abolhassani Moghadam, Ali Mellat Ardekani
INTRODUCTION: Chronic antiepileptic therapy has been associated with metabolic bone diseases including osteomalacia and osteoporosis. The aim of this study was to determine frequency of changes in biochemical and bone mineral density (BMD) in adults receiving valproaic acid (VPA) & carbamazepine (CBZ). METHODS: In a cross sectional study evaluating adults (age 20-50 y) epileptic patients receiving valproic acid or carbamazepine for at least 2 years. This study was conducted from May 2014 to May 2015 in Shahid Sadoughi Hospital of Yazd University of Medical Science, Yazd, Iran...
November 2016: Electronic Physician
https://www.readbyqxmd.com/read/28069346/prevalence-and-severity-of-bone-loss-in-burned-patients
#18
Aria Partovi, Alireza Dabaghmanesh, Sharareh Roshanzamir
Often discovered late during the clinical course of burns, bone loss is widely accepted by clinicians as a de facto consequence of burn. Literature on this bone loss is limited and contradictory in details. More insight into the prevalence and magnitude of bone loss may facilitate its prevention. To this end, over a period of two years, we gathered a test group of 34 male patients with at least six-month-old thermal burns and a control group of 50 male members of similar age and geographical background as our test group...
January 6, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28068986/leptin-and-adiponectin-as-predictors-of-cardiovascular-risk-after-gestational-diabetes-mellitus
#19
Tove Lekva, Annika Elisabet Michelsen, Pål Aukrust, Tore Henriksen, Jens Bollerslev, Thor Ueland
BACKGROUND: Gestational diabetes mellitus (GDM) is a significant risk factor for cardiovascular disease (CVD) in later life, but the mechanism remains unclear. Adipokine imbalance in the presence of metabolic dysfunction may be a key event in promoting CVD. The aim of the study was to examine the relationships between GDM, cardiovascular risk, and plasma adiponectin, leptin and the leptin/adiponectin (L/A) ratio in pregnancy and at 5 years after the index pregnancy. METHODS: This population-based prospective cohort included 300 women who had an oral glucose tolerance test (OGTT) during pregnancy...
January 10, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28068248/clinical-implementation-of-dual-energy-ct-for-proton-treatment-planning-on-pseudo-monoenergetic-ct-scans
#20
Patrick Wohlfahrt, Christian Möhler, Volker Hietschold, Stefan Menkel, Steffen Greilich, Mechthild Krause, Michael Baumann, Wolfgang Enghardt, Christian Richter
PURPOSE: To determine whether a standardized clinical application of dual-energy computed tomography (DECT) for proton treatment planning based on pseudomonoenergetic CT scans (MonoCTs) is feasible and increases the precision of proton therapy in comparison with single-energy CT (SECT). METHODS AND MATERIALS: To define an optimized DECT protocol, CT scan settings were analyzed experimentally concerning beam hardening, image quality, and influence on the heuristic conversion of CT numbers into stopping-power ratios (SPRs) and were compared with SECT scans with identical CT dose...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
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