keyword
MENU ▼
Read by QxMD icon Read
search

Rf

keyword
https://www.readbyqxmd.com/read/29928638/improvements-in-high-resolution-laryngeal-magnetic-resonance-imaging-for-preoperative-transoral-laser-microsurgery-and-radiotherapy-considerations-in-early-lesions
#1
Thomas Ruytenberg, Berit M Verbist, Jordi Vonk-Van Oosten, Eleftheria Astreinidou, Elisabeth V Sjögren, Andrew G Webb
As the benefits, limitations, and contraindications of transoral laser microsurgery (TLM) in glottic carcinoma treatments become better defined, pretreatment imaging has become more important to assess the case-specific suitability of TLM and to predict functional outcomes both for treatment consideration and patient counseling. Magnetic resonance imaging (MRI) is the preferred modality to image such laryngeal tumors, even though imaging the larynx using MRI can be difficult. The first challenge is that there are no commercial radiofrequency (RF) coils that are specifically designed for imaging the larynx, and performance in terms of coverage and signal-to-noise ratio is compromised using general-purpose RF coils...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29928438/the-first-thermic-treatment-predicts-following-chemoradiation-response-with-concurrent-thermal-therapy-for-the-treatment-of-rectal-cancer
#2
Hisanori Shoji, Masahiko Motegi, Kiyotaka Osawa, Takayuki Asao, Hiroyuki Kuwano, Takeo Takahashi, Kyoji Ogoshi
The present study aimed to evaluate whether the neoadjuvant chemoradiation response with concurrent thermal therapy for the treatment of rectal cancer can be predicted following the first thermic treatment. Eighty patients with primary rectal adenocarcinoma (≤12 cm from the anal verge) were included in this study. Fifty-four received surgery and pathological response was evaluated. Intensity-modulated radiotherapy was administered conventionally once daily 5 times/week. Neoadjuvant radiotherapy consisted of 50 Gy delivered to the planning target volume in 25 fractions...
July 2018: Oncology Letters
https://www.readbyqxmd.com/read/29928272/comparison-of-serological-biomarkers-in-rheumatoid-arthritis-and-their-combination-to-improve-diagnostic-performance
#3
Laura Martinez-Prat, Michael J Nissen, Céline Lamacchia, Chelsea Bentow, Laura Cesana, Pascale Roux-Lombard, Cem Gabay, Michael Mahler
Introduction: The diagnosis of rheumatoid arthritis (RA) is based on a combined approach that includes serological markers such as rheumatoid factor (RF) and anti-citrullinated peptide/protein antibodies (ACPA). The goal of this study was to evaluate the clinical performance of several RF and ACPA immunoassays for the diagnosis of RA, as well as the diagnostic value of a combinatory approach with these markers. Methods: The study cohort included 1,655 patients from the Swiss Clinical Quality Management registry with sera from 968 patients with RA and 687 disease controls, including patients with axial spondyloarthritis ( n  = 450) and psoriatic arthritis ( n  = 237)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29926817/how-random-is-the-random-forest-random-forest-algorithm-on-the-service-of-structural-imaging-biomarkers-for-alzheimer-s-disease-from-alzheimer-s-disease-neuroimaging-initiative-adni-database
#4
REVIEW
Stavros I Dimitriadis, Dimitris Liparas
Neuroinformatics is a fascinating research field that applies computational models and analytical tools to high dimensional experimental neuroscience data for a better understanding of how the brain functions or dysfunctions in brain diseases. Neuroinformaticians work in the intersection of neuroscience and informatics supporting the integration of various sub-disciplines (behavioural neuroscience, genetics, cognitive psychology, etc.) working on brain research. Neuroinformaticians are the pathway of information exchange between informaticians and clinicians for a better understanding of the outcome of computational models and the clinical interpretation of the analysis...
June 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29926173/relationship-of-ocular-presentation-in-granulomatosis-with-polyangiitis-to-autoantibodies-and-disease-activity
#5
T A Gheita, E M Abd El Latif
OBJECTIVE: The aim of this study was to assess disease characteristics, autoantibodies, and disease activity in granulomatosis with polyangiitis (GPA) patients with ocular manifestations. METHODS: The cohort included 46 GPA patients visiting the ophthalmology clinic. Ocular manifestations were recorded, clinical and slit lamp examinations were performed. The Birmingham Vasculitis Activity Score (BVAS) was recorded. Laboratory investigations and the antineutrophil cytoplasmic antibody (ANCA) assay were performed...
June 20, 2018: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/29925397/right-heart-catheterization-using-metallic-guidewires-and-low-sar-cardiovascular-magnetic-resonance-fluoroscopy-at-1-5-tesla-first-in-human-experience
#6
Adrienne E Campbell-Washburn, Toby Rogers, Annette M Stine, Jaffar M Khan, Rajiv Ramasawmy, William H Schenke, Delaney R McGuirt, Jonathan R Mazal, Laurie P Grant, Elena K Grant, Daniel A Herzka, Robert J Lederman
BACKGROUND: Cardiovascular magnetic resonance (CMR) fluoroscopy allows for simultaneous measurement of cardiac function, flow and chamber pressure during diagnostic heart catheterization. To date, commercial metallic guidewires were considered contraindicated during CMR fluoroscopy due to concerns over radiofrequency (RF)-induced heating. The inability to use metallic guidewires hampers catheter navigation in patients with challenging anatomy. Here we use low specific absorption rate (SAR) imaging from gradient echo spiral acquisitions and a commercial nitinol guidewire for CMR fluoroscopy right heart catheterization in patients...
June 21, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29924901/nonlinear-effects-induced-in-the-normalized-ion-density-in-a-linear-trap-system-for-a-large-ion-cloud
#7
Laura Pedrosa-Rodriguez, D A Outerelo, Francisco J Diaz-Otero
In this work we design, by means of a non-neutral plasma method, a linear trapping model for large ion clouds, which will become the core of an atomic clock. We first obtain the geometry and electromagnetic characteristics of the ion trap. We then perform a systematic analysis describing the main parameters of the ion cloud such as size, secular frequency and ion number per unit length in terms of temperature. The most appropriate operation point of the ion trap in terms of a set of these specific parameters is evaluated and a thorough discussion is performed about how minor perturbations introduced in these parameters affect, in a nonlinear response, the performance of the trapping system in terms of sensibility, heating and RF potential...
June 20, 2018: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29924449/high-prevalence-of-a-variety-of-autoantibodies-in-a-population-of-hepatitis-c-virus-infected-individuals
#8
Luz Marina Navarta, Carlos Alberto Espul, Nelson Acosta-Rivero
Hepatitis C virus (HCV) infection has been related to self-reactivity, extrahepatic manifestations and autoimmune diseases. The main goals of this work were to study the prevalence of autoantibodies and their relationship with viral titers and biochemical markers of hepatic damage in patients infected with HCV. Autoantibodies (ANA, AMA, SMA, APC, LKM, DNAds, ANCA, ATG and RF) were determined in 73 individuals with chronic HCV infection and 44 healthy volunteers. The presence of these antibodies was related to demographic variables, viral titers and biochemical parameters...
June 2018: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29923949/hypertonic-sodium-chloride-preinjectate-increases-in-vivo-radiofrequency-ablation-size-histological-and-magnetic-resonance-imaging-findings
#9
David A Provenzano, Eric R Cosman, Jared T Wilsey
BACKGROUND AND OBJECTIVES: Emphasis has been placed on methods to enlarge monopolar radiofrequency (RF) lesion size for pain management. Ex vivo research has suggested that fluid modulation may be an effective method to enlarge lesion zone. To date, these findings have not been confirmed in vivo. The purpose of this study was to determine the effect of hypertonic saline on in vivo lesion size through both histological and magnetic resonance imaging (MRI) analysis. A secondary purpose was to validate in vivo characterization of RF lesions using contrast-enhanced MRI...
June 19, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29922080/factors-correlated-with-the-improvement-of-endothelial-dysfunction-during-abatacept-therapy-in-patients-with-rheumatoid-arthritis
#10
Maurizio Benucci, Francesca Bandinelli, Arianna Damiani, Francesca Li Gobbi, Maria Infantino, Valentina Grossi, Mariangela Manfredi
Background: Rheumatoid arthritis patients are exposed to a high risk of cardiovascular morbidity and mortality even in the early phases of the disease. Methods: We evaluated carotid common carotid intimal media thickness (ccIMT) intimal thickness and brachial flow-mediated dilation (FMD) of 45 rheumatoid arthritis patients without known cardiovascular risk factors or heart disease on a stable dose of prednisone 5.2±1.2 mg/day and Methotrexate 11.5±2.1 mg at baseline (T0) and after 12 months (T1) of treatment with Abatacept 125 mg/week...
2018: Journal of Inflammation Research
https://www.readbyqxmd.com/read/29921526/first-in-man-experience-with-a-novel-catheter-based-renal-denervation-system-of-ultrasonic-ablation-in-patients-with-resistant-hypertension
#11
Gil Chernin, Iris Szwarcfiter, Dierk Scheinert, Erwin Blessing, Nicolas Diehm, Jo Dens, Antony Walton, Stefan Verheye, Sharad Shetty, Michael Jonas
PURPOSE: To report results of renal denervation (RDN) with the first catheter-based, non-balloon occlusion ultrasonic system in patients with resistant hypertension. MATERIALS AND METHODS: In a multicenter, single-arm trial, 39 patients with resistant hypertension (defined as uncontrolled hypertension while taking ≥ 3 antihypertensive medications) were treated. The cohort consisted of 4 groups: severe resistant hypertension (office systolic blood pressure [OSBP] ≥ 160 mm Hg) treated with a unidirectional catheter (group 1; n = 14); severe resistant hypertension treated with a multidirectional catheter (group 2; n = 18); moderate resistant hypertension (OSBP 140-159 mm Hg) treated with a multidirectional catheter (group 3; n = 5); and recurrent severe resistant hypertension, after an initial response to RF RDN (group 4; n = 2)...
June 16, 2018: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29921357/cardiovascular-tests-for-risk-assessment-in-asymptomatic-adults-and-implications-for-pilots
#12
I Made Ady Wirawan, Robin F Griffiths, Peter D Larsen
BACKGROUND: This study aims to examine which marker or testing protocols have been suggested for cardiovascular disease (CVD) risk assessment in asymptomatic populations, at which CVD risk level, and how this can be implemented for CVD risk assessment in pilot populations. METHODS: A systematic search was performed using Systematic Reviews Subset on PubMed; the OvidSP interface, including all EBM reviews and EMBASE databases; and the G-I-N International Guideline Library...
July 1, 2018: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29921041/comparative-study-between-carboxytherapy-platelet-rich-plasma-and-tripolar-radiofrequency-their-efficacy-and-tolerability-in-striae-distensae
#13
Naglaa A Ahmed, Osama M Mostafa
BACKGROUND: Striae distensae are very common cutaneous disorders that produce great psychological stress for women. OBJECTIVE: measure and compare between efficacy and tolerability of three modalities for treatment of striae distensae. PATIENTS AND METHODS: Forty-five female patients with striae distensae were randomly selected from the outpatient dermatology clinics of Al-Zahra university Hospital within 6 months period. Patients divided into three groups according to the therapeutic modalities were used...
June 19, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29920358/ephedra-gerardiana-aqueous-ethanolic-extract-and-fractions-attenuate-freund-complete-adjuvant-induced-arthritis-in-sprague-dawley-rats-by-downregulating-pge2-cox2-il-1%C3%AE-il-6-tnf-%C3%AE-nf-kb-and-upregulating-il-4-and-il-10
#14
Ambreen Malik Uttra, Alamgeer, Muhammad Shahzad, Arham Shabbir, Shah Jahan
ETHNOPHARMACOLOGICAL RELEVANCE: The whole plant, roots and stems of Ephedra gerardiana (Family Ephedraceae) have long been used as a folk remedy to treat rheumatism and painful joints in Northern Areas of Pakistan. AIM OF THE STUDY: The purpose of study was to observe the preventive efficacy of Ephedra gerardiana (EG) aerial parts in treating rheumatoid arthritis using Freund's complete adjuvant (FCA) induced arthritis in rat model and to determine its possible mechanism of action...
June 16, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29920074/characterization-of-gene-expression-profile-phenolic-composition-and-antioxidant-capacity-in-red-fleshed-grape-berries-and-their-wines
#15
Qianyu Yue, Lili Xu, Guangqing Xiang, Xin Yu, Yuxin Yao
Gene expression profile, phenolic composition and antioxidant capacity were evaluated in red-fleshed berries and their wines (RF berries and wines) from new grape genotypes. Transcriptomic analysis revealed that ten metabolic pathways involved in polyphenol synthesis and catabolism were significantly altered, and 13 genes related to the biosynthesis and transport of phenolics were largely up-regulated in RF berries compared to that of Cabernet Sauvignon (CS). Expression of MybA1 was associated with anthocyanin accumulation in red flesh...
June 19, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29916405/-eating-me-up-from-inside-a-pilot-study-of-mentalization-of-self-and-others-and-emotion-regulation-strategies-among-young-women-with-eating-disorders
#16
Lily Rothschild-Yakar, Merav Peled, Adi Enoch-Levy, Eitan Gur, Daniel Stein
BACKGROUND: We examined the relationship between general ability of mentalization, the specific aspect of affective mentalizing of self and others, emotion regulation strategies, and eating disorder (ED) symptoms. METHOD: Twenty-five female adolescent and young adult inpatients with EDs, and 22 healthy subjects, were administered a semi-structured interview - the Reflective Function (RF) scale, self-rating scales assessing alexithymia, emotion regulation, depression and ED symptomatology, and a neurocognitive measure assessing Theory of Mind...
2018: Israel Journal of Psychiatry and related Sciences
https://www.readbyqxmd.com/read/29915991/identifying-markers-of-sustained-remission-in-rheumatoid-arthritis-patients-on-long-term-tapered-biological-disease-modifying-antirheumatic-drugs
#17
Lara Valor, Jesús Garrido, Lina Martínez-Estupiñán, Diana Hernández-Flórez, Iustina Janta, Francisco Javier López-Longo, Indalecio Monteagudo, Carlos M González, Esperanza Naredo
To identify features associated with long-term persistent remission in rheumatoid arthritis (RA) patients on tapered biological disease-modifying antirheumatic drugs (bDMARD) (tap-bDMARD) therapy. We carried out a 40-month (m) extension follow-up study of 77 RA patients from a previous 12 m tap-bDMARD study. Disease activity was assessed at baseline and every 3 months. Doppler US investigation of 42 joints for the presence and grade (0-3) of B-mode synovial hypertrophy (SH) and synovial power Doppler signal (i...
June 18, 2018: Rheumatology International
https://www.readbyqxmd.com/read/29915951/prediction-of-survival-with-multi-scale-radiomic-analysis-in-glioblastoma-patients
#18
Ahmad Chaddad, Siham Sabri, Tamim Niazi, Bassam Abdulkarim
We propose a multiscale texture features based on Laplacian-of Gaussian (LoG) filter to predict progression free (PFS) and overall survival (OS) in patients newly diagnosed with glioblastoma (GBM). Experiments use the extracted features derived from 40 patients of GBM with T1-weighted imaging (T1-WI) and Fluid-attenuated inversion recovery (FLAIR) images that were segmented manually into areas of active tumor, necrosis, and edema. Multiscale texture features were extracted locally from each of these areas of interest using a LoG filter and the relation between features to OS and PFS was investigated using univariate (i...
June 19, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29915832/a-rainbow-ratiometric-fluorescent-sensor-array-on-bacterial-nanocellulose-for-visual-discrimination-of-biothiols
#19
Samira Abbasi-Moayed, Hamed Golmohammadi, Arafeh Bigdeli, M Reza Hormozi-Nezhad
Considering the crucial role of biothiols in many biological processes, which turns them into highly valuable biomarkers for the early diagnosis of various diseases, the development of an affordable, sensitive and portable probe for the identification and discrimination of these compounds is of great importance. Herein, we developed a ratiometric fluorescent (RF) sensor array with a wide color emissive variation, on a bacterial cellulose (BC) nanopaper substrate for the visual discrimination of biothiols. To this aim, RF sensing elements including N-acetyl l-cysteine capped green CdTe quantum dots-rhodamine B (GQDs-RhB) and red CdTe QDs-carbon dots (RQDs-CDs) at two different NaOH concentrations (0 and 5 mM) were utilized as sensor elements for the discrimination of biothiols...
June 19, 2018: Analyst
https://www.readbyqxmd.com/read/29914479/comparison-of-synthetic-aperture-architectures-for-miniaturised-ultrasound-imaging-front-ends
#20
Graham Peyton, Martyn G Boutelle, Emmanuel M Drakakis
BACKGROUND: Point of care ultrasonography has been the focus of extensive research over the past few decades. Miniaturised, wireless systems have been envisaged for new application areas, such as capsule endoscopy, implantable ultrasound and wearable ultrasound. The hardware constraints of such small-scale systems are severe, and tradeoffs between power consumption, size, data bandwidth and cost must be carefully balanced. METHODS: In this work, two receiver architectures are proposed and compared to address these challenges...
June 18, 2018: Biomedical Engineering Online
keyword
keyword
18653
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"