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https://www.readbyqxmd.com/read/28105469/qin-dawg-validation-of-gradient-nonlinearity-bias-correction-workflow-for-quantitative-diffusion-weighted-imaging-in-multicenter-trials
#1
Dariya I Malyarenko, Lisa J Wilmes, Lori R Arlinghaus, Michael A Jacobs, Wei Huang, Karl G Helmer, Bachir Taouli, Thomas E Yankeelov, David Newitt, Thomas L Chenevert
Previous research has shown that system-dependent gradient nonlinearity (GNL) introduces a significant spatial bias (nonuniformity) in apparent diffusion coefficient (ADC) maps. Here, the feasibility of centralized retrospective system-specific correction of GNL bias for quantitative diffusion-weighted imaging (DWI) in multisite clinical trials is demonstrated across diverse scanners independent of the scanned object. Using corrector maps generated from system characterization by ice-water phantom measurement completed in the previous project phase, GNL bias correction was performed for test ADC measurements from an independent DWI phantom (room temperature agar) at two offset locations in the bore...
December 2016: Tomography: a Journal for Imaging Research
https://www.readbyqxmd.com/read/28101457/therapeutic-effects-of-omega-3-fatty-acids-on-chronic-kidney-disease-associated-pruritus-a-literature-review
#2
REVIEW
Yunes Panahi, Simin Dashti-Khavidaki, Farahnoosh Farnood, Hamid Noshad, Mahsa Lotfi, Afshin Gharekhani
Uremic pruritus remains one of the most tormenting, frequent and potentially disabling problem in chronic kidney disease (CKD) patients. However, an area of substantial etiological interest with relation to uremic pruritus is the essential fatty acids deficiency. So we performed a literature review to elucidate the efficacy of omega-3 fatty acids on uremic pruritus. This review evaluated all of the studies published in English language, focusing on the clinical effects of omega-3 fatty acids on uremic pruritus...
December 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28101428/wide-field-and-highly-sensitive-angiography-based-on-optical-coherence-tomography-with-akinetic-swept-source
#3
Jingjiang Xu, Shaozhen Song, Wei Wei, Ruikang K Wang
Wide-field vascular visualization in bulk tissue that is of uneven surface is challenging due to the relatively short ranging distance and significant sensitivity fall-off for most current optical coherence tomography angiography (OCTA) systems. We report a long ranging and ultra-wide-field OCTA (UW-OCTA) system based on an akinetic swept laser. The narrow instantaneous linewidth of the swept source with its high phase stability, combined with high-speed detection in the system enable us to achieve long ranging (up to 46 mm) and almost negligible system sensitivity fall-off...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28091521/mechanisms-of-intrinsic-resistance-and-acquired-susceptibility-of-pseudomonas-aeruginosa-isolated-from-cystic-fibrosis-patients-to-temocillin-a-revived-antibiotic
#4
Hussein Chalhoub, Daniel Pletzer, Helge Weingart, Yvonne Braun, Michael M Tunney, J Stuart Elborn, Hector Rodriguez-Villalobos, Patrick Plésiat, Barbara C Kahl, Olivier Denis, Mathias Winterhalter, Paul M Tulkens, Françoise Van Bambeke
The β-lactam antibiotic temocillin (6-α-methoxy-ticarcillin) shows stability to most extended spectrum β-lactamases, but is considered inactive against Pseudomonas aeruginosa. Mutations in the MexAB-OprM efflux system, naturally occurring in cystic fibrosis (CF) isolates, have been previously shown to reverse this intrinsic resistance. In the present study, we measured temocillin activity in a large collection (n = 333) of P. aeruginosa CF isolates. 29% of the isolates had MICs ≤ 16 mg/L (proposed clinical breakpoint for temocillin)...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089680/peripheral-retinal-changes-associated-with%C3%A2-age-related-macular-degeneration-in%C3%A2-the-age-related-eye-disease-study-2-age-related-eye-disease-study-2-report-number-12-by-the%C3%A2-age-related-eye-disease-study-2-optos-peripheral-retina-opera-study-research-group
#5
Amitha Domalpally, Traci E Clemons, Ronald P Danis, SriniVas R Sadda, Catherine A Cukras, Cynthia A Toth, Thomas R Friberg, Emily Y Chew
PURPOSE: To compare rates of peripheral retinal changes in Age-Related Eye Disease Study 2 (AREDS2) participants with at least intermediate age-related macular degeneration (AMD) with control subjects without intermediate age-related changes (large drusen). DESIGN: Cross-sectional evaluation of clinic-based patients enrolled in AREDS2 and a prospective study. PARTICIPANTS: Participants from prospective studies. METHODS: The 200° pseudocolor and fundus autofluorescence (FAF) images were captured on the Optos 200 Tx Ultrawide-field device (Optos, Dunfermline, Scotland) by centering on the fovea and then steering superiorly and inferiorly...
January 12, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28079425/ensuring-care-quality-at-a-time-of-diminishing-resources
#6
John Tingle
John Tingle, Reader in Health Law at Nottingham Trent University, discusses the Care Quality Commission's State of Health Care report, in the light of some important clinical negligence trends and reports on major safety failures.
January 12, 2017: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/28079351/effect-of-age-on-outcomes-and-practice-patterns-for-patients-with-anterior-communicating-artery-aneurysms
#7
Federico Cagnazzo, Waleed Brinjikji, Giuseppe Lanzino
BACKGROUND: With widespread utilization of noninvasive imaging, small enraptured anterior communicating artery (AcoA) aneurysms are increasingly detected in the general population, particularly in elderly patients. We investigated the association between age and clinical characteristics and outcomes of patients with unruptured AcoA aneurysms. METHODS: Between January 2008 and May 2016, information on 179 consecutive patients with unruptured AcoA aneurysms was obtained and included demographic data, aneurysm features, risk factors for formation and rupture, treatment type, complications, and follow-up information...
January 12, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28073996/estimate-of-false-positive-breast-cancer-diagnoses-from-accuracy-studies-a-systematic-review
#8
REVIEW
Nereo Segnan, Silvia Minozzi, Antonio Ponti, Cristina Bellisario, Sara Balduzzi, Marien González-Lorenzo, Silvia Gianola, Paola Armaroli
BACKGROUND: False-positive histological diagnoses have the same consequences of overdiagnosis in terms of unnecessary treatment. The aim of this systematic review is to assess their frequency at needle core biopsy (CB) and/or surgical excision of the breast. METHODS: PubMed, Embase, Cochrane Library were systematically searched up to 30 October 2015. Eligibility criteria: cross-sectional studies assessing diagnostic accuracy of CB compared with surgical excision; studies assessing reproducibility of pathologists reading the same slides...
January 10, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28069053/influence-of-daily-imaging-on-plan-quality-and-normal-tissue-toxicity-for-prostate-cancer-radiotherapy
#9
Katharina Bell, Marina Heitfeld, Norbert Licht, Christian Rübe, Yvonne Dzierma
BACKGROUND: Modern radiotherapy offers various possibilities for image guided verification of patient positioning. Different clinically relevant IGRT (image guided radiotherapy) scenarios were considered with regard to their influence on dosimetric plan quality and normal tissue complication probability (NTCP). METHODS: This study is based on treatment plans of 50 prostate patients. We evaluate the clinically performed IGRT and simulate the influence of different daily IGRT scenarios on plan quality...
January 10, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28068615/effects-of-levomilnacipran-er-on-noradrenergic-symptoms-anxiety-symptoms-and-functional-impairment-in-adults-with-major-depressive-disorder-post-hoc-analysis-of-5-clinical-trials
#10
Pierre Blier, Carl Gommoll, Changzheng Chen, Kenneth Kramer
OBJECTIVE: To evaluate the effects of levomilnacipran extended-release (LVM-ER; 40-120mg/day) on noradrenergic (NA) and anxiety-related symptoms in adults with major depressive disorder (MDD) and explore the relationship between these symptoms and functional impairment. METHODS: Data were pooled from 5 randomized, double-blind, placebo-controlled trials (N=2598). Anxiety and NA Cluster scores were developed by adding selected item scores from the Montgomery-Åsberg Depression Rating Scale (MADRS) and 17-item Hamilton Depression Rating Scale (HAMD17)...
November 15, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28067632/hcv-genotype-1-subtypes-and-resistance-associated-substitutions-in-drug-naive-and-in-direct-acting-antiviral-treatment-failure-patients
#11
Yael Gozlan, Ziv Ben-Ari, Roy Moscona, Rachel Shirazi, Avia Rakovsky, Arij Kabat, Ella Veizman, Tania Berdichevski, Peretz Weiss, Oranit Cohen-Ezra, Yoav Lurie, Inna Gafanovich, Marius Braun, Michal Cohen-Naftaly, Amir Shlomai, Oren Shibolet, Ehud Zigmond, Eli Zuckerman, Michal Carmiel-Haggai, Assy Nimer, Rawi Hazzan, Yaakov Maor, Yona Kitay-Cohen, Yonat Shemer, Zipi Kra-Oz, Lisita Schreiber, Ofer Peleg, Ella Mendelson, Orna Mor
BACKGROUND: Direct-acting antiviral (DAA) treatment regimens and response rates of patients with hepatitis C virus (HCV) genotype 1 (GT1) are currently considered subtype-dependent. Identification of clinically relevant resistance-associated substitutions (RASs) in the NS3 and NS5A proteins at baseline and in DAA failures, may also impact clinical decisions. METHODS: In a multicenter cohort study (n=308), NS3 or NS5B sequencing (n=248) was used to discriminate between GT1 subtypes...
January 9, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28066096/pain-on-propofol-injection-causes-and-remedies
#12
REVIEW
Kalindi Anil Desousa
Pain on propofol injection (POPI) is a minor problem that all anesthetists face every day. Introduction of several new formulations and hundreds of clinical trials have failed to find its remedy with just one intervention in all patients. This article highlights the causes of POPI and interventions that are used to eliminate this pain in current practice. Relevant articles from Medline and Embase databases were searched and included in this descriptive review with the following conclusions: (1) POPI is due to irritation of venous adventitia leading to release of mediators such as kininogen from kinin cascade...
November 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28066010/olanzapine-has-better-efficacy-compared-to-risperidone-for-treatment-of-negative-symptoms-in-schizophrenia
#13
P N Suresh Kumar, P K Anish, V Rajmohan
OBJECTIVE: The safety and efficacy profile of risperidone and olanzapine were compared in a double-blind trial that used doses widely accepted in clinical practice. METHODS: Subjects (n = 71) who met Diagnostic and Statistical Manual of Mental Disorders-IV criteria for schizophrenia were randomly assigned to receive 2-8 mg/day of risperidone (mean modal dose = 5.5 mg/day) or 5-20 mg/day of olanzapine (mean modal dose = 14.4 mg/day) for 1 year. RESULTS: The two study groups were similar at baseline in all aspects...
July 2016: Indian Journal of Psychiatry
https://www.readbyqxmd.com/read/28065953/self-evaluation-of-ethical-review-committees-functioning-at-foundation-university-medical-college-fumc-through-structured-constitution-practice-outcome-cpo-assessment-model
#14
Sadia Ahsin, Gul E Naghma Saeed
OBJECTIVE: To assess the operational efficiency of the ethical review committee of a medical college. METHODS: This study was conducted at the Foundation University Medical College, Islamabad, Pakistan, from 2012 to 2014. On the basis of literature review, methods for assessment of various features of ethical review committee were studied. A constitution-practice-outcome measurement model for evaluation of ethical review committee assessment process was developed...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28063524/switching-from-conventional-photodynamic-therapy-to-daylight-photodynamic-therapy-for-actinic-keratoses-systematic-review-and-meta-analysis
#15
A Tomás-Velázquez, P Redondo
Actinic keratosis is a precursor lesion to the most common nonmelanoma skin cancer. Conventional photodynamic therapy (PDT) has been shown to be effective, but the procedure is time-consuming, can be very painful, and requires infrastructure. These shortcomings led to the emergence of daylight PDT. To obtain a global estimate of efficacy, we undertook a systematic literature review and performed a meta-analysis of the available evidence on the efficacy and safety of daylight PDT as compared to conventional PDT in the treatment of actinic keratosis and/or field cancerization...
January 4, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/28062569/inhibition-of-%C3%AE-v%C3%AE-5-integrin-attenuates-vascular-permeability-and-protects-against-renal-ischemia-reperfusion-injury
#16
Amy McCurley, Stella Alimperti, Silvia B Campos-Bilderback, Ruben M Sandoval, Jenna E Calvino, Taylor L Reynolds, Catherine Quigley, Joshua W Mugford, William J Polacheck, Ivan G Gomez, Jennifer Dovey, Graham Marsh, Angela Huang, Fang Qian, Paul H Weinreb, Brian M Dolinski, Shaun Moore, Jeremy S Duffield, Christopher S Chen, Bruce A Molitoris, Shelia M Violette, Michael A Crackower
Ischemia-reperfusion injury (IRI) is a leading cause of AKI. This common clinical complication lacks effective therapies and can lead to the development of CKD. The αvβ5 integrin may have an important role in acute injury, including septic shock and acute lung injury. To examine its function in AKI, we utilized a specific function-blocking antibody to inhibit αvβ5 in a rat model of renal IRI. Pretreatment with this anti-αvβ5 antibody significantly reduced serum creatinine levels, diminished renal damage detected by histopathologic evaluation, and decreased levels of injury biomarkers...
January 6, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28059044/natural-product-inhibitors-of-histone-deacetylases-as-new-anticancer-agents
#17
Aysegul Hanikoglu, Ferhat Hanikoglu, Tomris Ozben
Acetylation and deactylation of histones are important determinants of gene expression. Histone deacetylases (HDACs) remove acetyl groups from histones leading to suppression and regulation of epigenetic gene expression. Current studies have demonstrated that HDAC-inhibitors (HDACIs) inducing histone hyperacetylation are promising novel agents in cancer treatment. HDACIs have been shown to have significant anticancer effects with negligible toxicity in the preclinical studies. Ongoing clinial trials are being performed to investigate the efficiency of HDACIs in human cancers...
January 5, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28052855/syn-004-ribaxamase-an-oral-%C3%AE-lactamase-designed-to-protect-the-gut-microbiome-from-the-deleterious-effects-of-certain-intravenously-administered-%C3%AE-lactam-antibiotics-degrades-ceftriaxone-excreted-into-the-intestine-in-phase-2a-clinical-studies
#18
John F Kokai-Kun, Tracey Roberts, Olivia Coughlin, Eric Sicard, Marianne Rufiange, Richard Fedorak, Christian Carter, Marijke H Adams, James Longstreth, Heidi Whalen, Joseph Sliman
SYN-004 (ribaxamase) is a β-lactamase designed to be orally administered concurrently with intravenous β-lactam antibiotics including most penicillins and cephalosporins. Ribaxamase's anticipated mechanism of action is to degrade excess β-lactam antibiotic that is excreted into the small intestine. This enzymatic inactivation of excreted antibiotic is expected to protect the gut microbiome from disruption and thus prevent undesirable side effects including secondary infections like Clostridium difficile as well as other antibiotic-associated diarrheas...
January 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28052760/evaluation-of-the-importance-of-fever-with-respect-to-dengue-prognosis-according-to-the-2009-who-classification-a-retrospective-study
#19
Caroline Tukasan, Nathália Barbosa Furlan, Cássia Fernanda Estofolete, Maurício Lacerda Nogueira, Natal Santos da Silva
BACKGROUND: The 2009 revised World Health Organization (WHO) guidelines for dengue describe fever as the core symptom. Accordingly, the diagnosis of non-febrile patients is complicated. The aim of this study was to evaluate the importance of fever in patients with dengue according to the 2009 revised WHO classification. METHODS: In this study, we assessed 30,670 dengue cases using enzyme-linked immunosorbent assay, detection of the non-structural protein 1, or polymerase chain reaction for diagnostic confirmation...
January 4, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28052042/a-printed-yagi-uda-antenna-for-application-in-magnetic-resonance-thermometry-guided-microwave-hyperthermia-applicators
#20
Margarethus Marius Paulides, R Mestrom, Ghassan Salim, Bedilu Adela, Wouter Numan, Tomas Drizdal, Desmond Yeo, Bart Smolders
Biological studies and clinical trials show that addition of hyperthermia stimulates conventional cancer treatment modalities and significantly improves treatment outcome. This supra-additive stimulation can be optimized by adaptive hyperthermia to counteract strong and dynamic thermoregulation. The only clinically proven method for the 3D non-invasive temperature monitoring required is by magnetic resonance (MR) temperature imaging, but the currently available set of MR compatible hyperthermia applicators lack the degree of heat control required...
January 4, 2017: Physics in Medicine and Biology
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