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https://www.readbyqxmd.com/read/29161293/high-intensity-focused-ultrasound-ablation-around-the-tubing
#1
Jun Yang Siu, Chenhui Liu, Yufeng Zhou
High-intensity focused ultrasound (HIFU) has been emerging as an effective and noninvasive modality in cancer treatment with very promising clinical results. However, a small vessel in the focal region could be ruptured, which is an important concern for the safety of HIFU ablation. In this study, lesion formation in the polyacrylamide gel phantom embedded with different tubing (inner diameters of 0.76 mm and 3 mm) at varied flow speeds (17-339 cm/s) by HIFU ablation was photographically recorded. Produced lesions have decreased length (~30%) but slightly increased width (~6%) in comparison to that without the embedded tubing...
2017: PloS One
https://www.readbyqxmd.com/read/29159855/b1-artifact-reduction-in-abdominal-dce-mri-using-kt-points-first-clinical-assessment-of-dynamic-rf-shimming-at-3t
#2
Raphaël Tomi-Tricot, Vincent Gras, Franck Mauconduit, François Legou, Nicolas Boulant, Matthias Gebhardt, Dieter Ritter, Berthold Kiefer, Pierre Zerbib, Alain Rahmouni, Alexandre Vignaud, Alain Luciani, Alexis Amadon
BACKGROUND: The excitation inhomogeneity artifact occurring at 3T in the abdomen can lead to dramatic loss of signal and contrast, thereby hampering diagnosis. PURPOSE: To assess excitation homogeneity and image quality achieved by nonselective prototypical kT -points pulses, compared to tailored static RF shimming, in clinical routine on a commercial dual-transmit scanner. STUDY TYPE: Retrospective study with Institutional Review Board approval; informed consent was waived...
November 21, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29136792/comparative-performances-of-a-bare-graphite-polyurethane-composite-electrode-unmodified-and-modified-with-graphene-and-carbon-nanotubes-in-the-electrochemical-determination-of-escitalopram
#3
Marina Baccarin, Priscila Cervini, Eder Tadeu Gomes Cavalheiro
A bare composite graphite-polyurethane electrode (EGPU) and two other modified with graphene (EGPU-GR) and functionalized multi-walled carbon nanotubes (EGPU-CNTs) were prepared and compared regarding their voltammetric response to escitalopran (EST). The modifiers were characterized by Raman spectroscopy and the resulting electrode materials by contact angle measurements with a hydrophilicity character in the ascending order for the composites: GPU > GPU-GR > GPU-CNTs and scanning electron microscopy (SEM)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29131836/opportunistic-screening-for-atrial-fibrillation-in-a-real-life-setting-in-general-practice-in-denmark-the-atrial-fibrillation-found-on-routine-detection-afford-non-interventional-study
#4
Jonas Hald, Peter Bo Poulsen, Ina Qvist, Lisbeth Holm, Dorte Wedell-Wedellsborg, Lars Dybro, Lars Frost
Atrial fibrillation (AF) is a chronic disease with an incidence increasing steeply by age and affecting more than 11 million patients in Europe and the United States. Diagnosing AF is essential for the prevention of stroke by oral anticoagulation. Opportunistic screening for AF in patients ≥65 years of age is recommended by the European and Danish Societies of Cardiology. The study aim was to examine the detection rate of AF in consecutively screened patients in the primary care setting in Denmark. In an open, non-interventional, cluster, multicenter, cross-sectional, observational study patients ≥65 years of age entering consecutively into general practice clinics were invited to nurse-assisted opportunistic screening for AF...
2017: PloS One
https://www.readbyqxmd.com/read/29110473/cycloreversion-reaction-of-a-diarylethene-derivative-at-higher-excited-states-attained-by-two-color-two-photon-femtosecond-pulsed-excitation
#5
Hikaru Sotome, Tatsuhiro Nagasaka, Kanako Une, Soichiro Morikawa, Tetsuro Katayama, Seiya Kobatake, Masahiro Irie, Hiroshi Miyasaka
Abstract  Two-color two-pulse femtosecond pulsed excitation was applied to the elucidation of the dynamics and mechanism of cycloreversion reaction of a diarylethene derivative in the higher excited states. Transient absorption spectroscopy under one-photon visible excitation revealed that the 1B state produced by the excitation undergoes the internal conversion into the 2A state with a time constant of 200 fs. Geometrical rearrangement of the 2A state takes place concomitantly with the vibrational cooling with a time constant of 3 ps...
November 6, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29096842/safety-aspects-of-lipidapheresis-using-dali-and-monet-multicenter-observational-study
#6
Justyna Kozik-Jaromin, Eberhard Röseler, Franz Heigl, Ralf Spitthöver, Jens Ringel, Gerd Schmitz, Rainer Heinzler, Nadim Abdul-Rahman, Frank Leistikow, Frido Himmelsbach, Volker Schettler, Ingrid Uhlenbusch-Körwer, Wolfgang Ramlow
BACKGROUND: Lipidapheresis was introduced for intractable hyperlipidemia as a more selective therapy than plasma exchange aiming to enhance efficacy and limit side-effects. Although this therapy is regarded safe, multicenter data from routine application are limited. We investigated direct adsorption of lipoproteins (DALI) and lipofiltration (MONET) regarding the short and the long-term safety aspects. METHODS: This multicenter observational study prospectively evaluated 2154 DALI and 1297 MONET sessions of 122 patients during a period of 2 years...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29093987/targeting-the-epitope-spreader-pep19-by-na%C3%A3-ve-human-cd45ra-regulatory-t-cells-dictates-a-distinct-suppressive-t-cell-fate-in-a-novel-form-of-immunotherapy
#7
Hyun-Joo Kim, Gil Sun Cha, Ji-Young Joo, Juyoun Lee, Sung-Jo Kim, Jeongae Lee, So Youn Park, Jeomil Choi
Purpose: Beyond the limited scope of non-specific polyclonal regulatory T cell (Treg)-based immunotherapy, which depends largely on serendipity, the present study explored a target Treg subset appropriate for the delivery of a novel epitope spreader Pep19 antigen as part of a sophisticated form of immunotherapy with defined antigen specificity that induces immune tolerance. Methods: Human polyclonal CD4(+)CD25(+)CD127(lo-) Tregs (127-Tregs) and naïve CD4(+)CD25(+)CD45RA(+) Tregs (45RA-Tregs) were isolated and were stimulated with target peptide 19 (Pep19)-pulsed dendritic cells in a tolerogenic milieu followed by ex vivo expansion...
October 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29090067/magnetic-iron-oxide-nanoparticles-as-t2-mr-imaging-contrast-agent-for-detection-of-breast-cancer-mcf-7-cell
#8
Pegah Moradi Khaniabadi, Daryoush Shahbazi-Gahrouei, Mohammad Suhaimi Jaafar, Amin Malik Shah Abdul Majid, Bita Moradi Khaniabadi, Saghar Shahbazi-Gahrouei
BACKGROUND: Advances of nanotechnology have led to the development of nano-materials with both potential diagnostic and therapeutic applications. Among them, Super Paramagnetic Iron Oxide Nanoparticles (SPIONs) have received particular attention. Modified EDC coupling fraction was used to fabricate the SPION-C595 as an MR imaging contrast agent for breast cancer detection in early stages. METHODS: Nanoprobe characterization was confirmed using Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy (SEM-EDAX), and Photon Correlation Spectroscopy (PCS)...
October 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/29082085/millisecond-infrared-laser-pulses-depolarize-and-elicit-action-potentials-on-in-vitro-dorsal-root-ganglion-neurons
#9
Lambert Paris, Isabelle Marc, Benoit Charlot, Michel Dumas, Jean Valmier, Fabrice Bardin
This work focuses on the optical stimulation of dorsal root ganglion (DRG) neurons through infrared laser light stimulation. We show that a few millisecond laser pulse at 1875 nm induces a membrane depolarization, which was observed by the patch-clamp technique. This stimulation led to action potentials firing on a minority of neurons beyond an energy threshold. A depolarization without action potential was observed for the majority of DRG neurons, even beyond the action potential energy threshold. The use of ruthenium red, a thermal channel blocker, stops the action potential generation, but has no effects on membrane depolarization...
October 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29075322/pulse-electromagnetic-fields-enhance-extracellular-electron-transfer-in-magnetic-bioelectrochemical-systems
#10
Huihui Zhou, Bingfeng Liu, Qisong Wang, Jianmin Sun, Guojun Xie, Nanqi Ren, Zhiyong Jason Ren, Defeng Xing
BACKGROUND: Microbial extracellular electron transfer (EET) is essential in driving the microbial interspecies interaction and redox reactions in bioelectrochemical systems (BESs). Magnetite (Fe3O4) and magnetic fields (MFs) were recently reported to promote microbial EET, but the mechanisms of MFs stimulation of EET and current generation in BESs are not known. This study investigates the behavior of current generation and EET in a state-of-the-art pulse electromagnetic field (PEMF)-assisted magnetic BES (PEMF-MBES), which was equipped with magnetic carbon particle (Fe3O4@N-mC)-coated electrodes...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29067616/a-clinical-review-of-phototherapy-for-psoriasis
#11
REVIEW
Ping Zhang, Mei X Wu
Psoriasis is an autoimmune inflammatory skin disease. In the past several decades, phototherapy has been widely used to treat stable psoriatic lesions, including trunk, scalp, arms and legs, and partial nail psoriasis. A variety of light/lasers with different mechanisms of action have been developed for psoriasis including ultraviolet B (UVB), psoralen ultraviolet A (PUVA), pulsed dye laser (PDL), photodynamic therapy (PDT), intense pulsed light (IPL), light-emitting diodes (LED), and so on. Because light/laser each has specific therapeutic and adverse effects, it is important to adequately choose the sources and parameters in management of psoriasis with different pathogenic sites, severities, and duration of the disorder...
October 24, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29065616/smartphone-driven-low-power-light-emitting-device
#12
Hea-Ja An, Kyung-Won Kim, Mun-Ho Ryu, Han-Yeong Oh, Nam-Gyun Kim, Kyoung-Jun Park
Low-level light (laser) therapy (LLLT) has been widely researched in the recent past. Existing LLLT studies were performed based on laser. Recently, studies using LED have increased. This study presents a smartphone-driven low-power light-emitting device for use in colour therapy as an alternative medicine. The device consists of a control unit and a colour probe. The device is powered by and communicates with a smartphone using USB On-The-Go (OTG) technology. The control unit controls emitting time and intensity of illumination with the configuration value of a smartphone application...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29063806/does-a-mediterranean-type-dietary-pattern-exert-a-cardio-protective-effect-outside-the-mediterranean-region-a-review-of-current-evidence
#13
Gabriele Mocciaro, Nida Ziauddeen, Justyna Godos, Marina Marranzano, Mei-Yen Chan, Sumantra Ray
Current evidence suggests a beneficial effect of the Mediterranean diet (MD) on human health. This has led to a rise in studies investigating the role of the MD in cardiovascular disease (CVD) prevention outside the region of its origin. We aimed to outline the evolving understanding of the MD and to provide an overview of adherence to MD in non-Mediterranean countries and the modulatory effects of MD on CVD biomarkers. Evidence suggest that MD may exert a protective effect on CVD via ameliorating blood lipid profile and blood pressure...
October 24, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/29060602/development-of-a-smartphone-based-pulse-oximeter-with-adaptive-snr-power-balancing
#14
Tom Phelps, Haowei Jiang, Drew A Hall
Millions worldwide suffer from diseases that exhibit early warnings signs that can be detected by standard clinical-grade diagnostic tools. Unfortunately, such tools are often prohibitively expensive to the developing world leading to inadequate healthcare and high mortality rates. To address this problem, a smartphone-based pulse oximeter is presented that interfaces with the phone through the audio jack, enabling point-of-care measurements of heart rate (HR) and oxygen saturation (SpO2). The device is designed to utilize existing phone resources (e...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059975/a-novel-hardware-implementation-for-detecting-respiration-rate-using-photoplethysmography
#15
Joseph Prinable, Peter Jones, Cindy Thamrin, Alistair McEwan
Asthma is a serious public health problem. Continuous monitoring of breathing may offer an alternative way to assess disease status. In this paper we present a novel hardware implementation for the capture and storage of a photoplethysmography (PPG) signal. The LED duty cycle was altered to determine the effect on respiratory rate accuracy. The oximeter was mounted to the left index finger of ten healthy volunteers. The breathing rate derived from the oximeter was validated against a nasal airflow sensor. The duty cycle of a pulse oximeter was changed between 5%, 10% and 25% at a sample rate of 500 Hz...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29051871/bilateral-divergent-shoulder-s-fracture-dislocation-case-in-an-ischemic-stroke-patient
#16
Atchi Walla, Faré Gnandi-Piou, Pilakimwé Egbohou, Komi Assogba, Mawuko Quacoe
INTRODUCTION: The literature review revealed that nowadays only about 15 cases of bilateral shoulder dislocation associated with the fracture of the upper end of the humerus have been published. The triad of lesional mechanism designated by the triple syndrome E composed of epilepsy, electrocution, and external trauma was the circumstances noted in which these fractures dislocations occur with migration of the two humeral heads either forward or backward. CASE REPORT: An architect of 36-year-old, right-handed, was admitted in emergency department for loss of knowledge of progressive installation...
May 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29048215/sauna-exposure-leads-to-improved-arterial-compliance-findings-from-a-non-randomised-experimental-study
#17
Earric Lee, Tanjaniina Laukkanen, Setor K Kunutsor, Hassan Khan, Peter Willeit, Francesco Zaccardi, Jari A Laukkanen
Background Heat therapy has been suggested to improve cardiovascular function. However, the effects of hot sauna exposure on arterial compliance and the dynamics of blood flow and pressure have not been well documented. Thus, we investigated the short-term effects of sauna bathing on arterial stiffness and haemodynamics. Design The design was an experimental non-randomised study. Methods There were 102 asymptomatic participants (mean age, 51.9 years) who had at least one cardiovascular risk factor. Participants were exposed to a single sauna session (duration: 30 min; temperature: 73℃; humidity: 10-20%)...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29048157/paramagnetic-19-f-relaxation-enhancement-in-nickel-ii-complexes-of-n-trifluoroethyl-cyclam-derivatives-and-cell-labeling-for-19-f-mri
#18
Jan Blahut, Karel Bernášek, Andrea Gálisová, Vít Herynek, Ivana Císařová, Jan Kotek, Jan Lang, Stanislava Matějková, Petr Hermann
1,8-Bis(2,2,2-trifluoroethyl)cyclam (te2f) derivatives with two coordinating pendant arms involving methylenecarboxylic acid (H2te2f2a), methylenephosphonic acid (H4te2f2p), (2-pyridyl)methyl (te2f2py), and 2-aminoethyl arms (te2f2ae) in 4,11-positions were prepared, and their nickel(II) complexes were investigated as possible (19)F MR tracers. The solid-state structures of several synthetic intermediates, ligands, and all complexes were confirmed by X-ray diffraction analysis. The average Ni···F distances were determined to be about 5...
November 6, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29048004/double-pulse-1-57%C3%A2-%C3%A2-%C3%AE-m-integrated-path-differential-absorption-lidar-ground-validation-for-atmospheric-carbon-dioxide-measurement
#19
Juan Du, Yadan Zhu, Shiguang Li, Junxuan Zhang, Yanguang Sun, Huaguo Zang, Dan Liu, Xiuhua Ma, Decang Bi, Jiqiao Liu, Xiaolei Zhu, Weibiao Chen
A ground-based double-pulse integrated path differential absorption (IPDA) instrument for carbon dioxide (CO2) concentration measurements at 1572 nm has been developed. A ground experiment was implemented under different conditions with a known wall located about 1.17 km away acting as the scattering hard target. Off-/offline testing of a laser transmitter was conducted to estimate the instrument systematic and random errors. Results showed a differential absorption optical depth (DAOD) offset of 0.0046 existing in the instrument...
September 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29047769/performance-of-photomultipliers-in-the-context-of-laser-induced-incandescence
#20
Raphael Mansmann, Thomas Dreier, Christof Schulz
Photomultiplier tubes (PMTs) are widely used as detectors for laser-induced incandescence (LII), a diagnostics method for gas-borne particles that requires signal detection over a large dynamic range with nanosecond time resolution around the signal peak. Especially when more than one PMT is used (i.e., for pyrometric temperature measurements) even small deviations from the linear detector response can lead to significant errors. Reasons for non-linearity observed in other PMT measurement techniques are summarized and strategies to identify non-linear PMT operation in LII are outlined...
October 1, 2017: Applied Optics
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