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https://www.readbyqxmd.com/read/29332078/magnetic-resonance-guided-high-intensity-focused-ultrasound-for-treating-movement-disorders
#1
Young Goo Kim, Eun Jung Kweon, Won Seok Chang, Hyun Ho Jung, Jin Woo Chang
Transcranial magnetic resonance-guided focused ultrasound (MRgFUS) surgery has recently gained favor as a novel, noninvasive alternative to conventional neurosurgery. In contrast to traditional ablative interventions, transcranial MRgFUS surgery is entirely imaging-guided and uses continuous temperature measurements at the target and surrounding tissue taken in real-time. Unlike Gamma Knife radiosurgery, MRgFUS surgery can make a lesion immediately and does not use ionizing radiation. Moreover, since no metallic device is implanted, MR imaging-based diagnosis is not restricted throughout life...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29330886/surgery-and-magnetic-resonance-imaging-increase-the-risk-of-hypothermia-in-infants
#2
Joel M Don Paul, Elizabeth J Perkins, Prue M Pereira-Fantini, Asha Suka, Olivia Farrell, Julia K Gunn, Anushi E Rajapaksa, David G Tingay
AIM: Maintaining normothermia is a tenet of neonatal care. However, neonatal thermal care guidelines applicable to intra-hospital transport beyond the neonatal intensive care unit (NICU) and during surgery or magnetic resonance imaging (MRI) are lacking. The aim of this study is to determine the proportion of infants normothermic (36.5-37.5°C) on return to NICU after management during surgery and MRI, and during standard clinical care in both environments. METHODS: Sixty-two newborns requiring either surgery in the operating theatre (OT) (n = 41) or an MRI scan (n = 21) at the Royal Children's Hospital (Melbourne) NICU were prospectively studied...
January 13, 2018: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/29329861/in-situ-characterization-of-acidic-and-thermal-protein-denaturation-by-infrared-microspectroscopy
#3
Michiyo Motoyama, Annie Vénien, Olivier Loison, Christophe Sandt, Genya Watanabe, Jason Sicard, Keisuke Sasaki, Thierry Astruc
Foods meet acid pH during gastric digestion after cooking. An in situ infrared microspectroscopy approach was developed to detect the effects of heat and acid treatments on protein structure separately. Infrared spectra were obtained from meat samples treated with heat and/or acid, and wavenumbers accounting independently for the treatments were extracted by principal component regression. Extreme-acid treatment (pHinitial 2.0) was well predicted (0.5% error) by a simple ratio of as-observed spectral intensities at 1211 and 1396 cm-1, reflecting a perturbation in the vibration of amino acid residues (phenylalanine, tyrosine and aspartic acid) by protein unfolding and protonation...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29328186/single-crystal-er3-%C3%A2-%C3%A2-yag-fibers-with-tailored-refractive-index-profiles
#4
L Cheng, T Chick, J Chapman, E F C Dreyer, C D Nie, S Bera, J A Harrington, S C Rand
Erbium-doped yttrium aluminum garnet (Er3+:YAG) rods were inserted inside undoped tubes and grown into single-crystal fibers of a diameter of 300 μm using the laser-heated pedestal growth technique. Growth at various rates resulted in radially graded distributions of Er3+ dopant ions, as observed using laser-induced fluorescence imaging. Profiles of the refractive index were measured using cross-sectional reflectometry in a microscope. Dopant distributions and the corresponding index profiles were compared with thermal diffusion theory to determine the inter-diffusion coefficient of Y3+ and Er3+ ions at 2000°C, yielding an estimated value of D=(9...
January 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29328152/single-shot-dual-mode-water-immersion-microscopy-platform-for-biological-applications
#5
José Ángel Picazo-Bueno, Dan Cojoc, Federico Iseppon, Vincent Torre, Vicente Micó
A single-shot water-immersion digital holographic microscope combined with broadband (white light) illumination mode is presented. This double imaging platform allows conventional incoherent visualization with phase holographic imaging of inspected samples. The holographic architecture is implemented at the image space (that is, after passing the microscope lens), thus reducing the sensitivity of the system to vibrations and/or thermal changes in comparison to regular interferometers. Because of the off-axis holographic recording principle, quantitative phase images of live biosamples can be recorded in a single camera snapshot at full-field geometry without any moving parts...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29328116/hybrid-sensing-face-detection-and-registration-for-low-light-and-unconstrained-conditions
#6
Mingyuan Zhou, Haiting Lin, S Susan Young, Jingyi Yu
The capability to track, detect, and identify human targets in highly cluttered scenes under extreme conditions, such as in complete darkness or on the battlefield, has been one of the primary tactical advantages in military operations. In this paper, we propose a new collaborative, multi-spectrum sensing method to achieve face detection and registration under low-light and unconstrained conditions. We design and prototype a novel type of hybrid sensor by combining a pair of near-infrared (NIR) cameras and a thermal camera (a long-wave infrared camera)...
January 1, 2018: Applied Optics
https://www.readbyqxmd.com/read/29327577/interplay-of-interfacial-layers-and-blend-composition-to-reduce-thermal-degradation-of-polymer-solar-cells-at-high-temperature
#7
Sadok Ben Dkhil, Martin Pfannmöller, Rasmus R Schroeder, Riva Alkarsifi, Meriem Gaceur, Wolfgang Köntges, Hamed Heidari, Sara Bals, Olivier Margeat, Jörg Ackermann, Christine Videlot-Ackermann
The thermal stability of printed polymer solar cells at elevated temperatures needs to be improved to achieve high-throughput fabrication including annealing steps as well as long-term stability. During device processing, thermal annealing impact both the organic photoactive layer and the two interfacial layers making detailed studies of degradation mechanism delicate. A recently identified thermally stable PTB7:PC70BM blend as photoactive layer in combination with PEDOT:PSS as hole extraction layer is used here to focus on the impact of electron extraction layer (EEL) on the thermal stability of solar cells...
January 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29327374/dynamic-coronary-mr-angiography-in-a-pig-model-with-hyperpolarized-water
#8
Kasper Wigh Lipsø, Esben Søvsø Szocska Hansen, Rasmus Stilling Tougaard, Christoffer Laustsen, Jan Henrik Ardenkjaer-Larsen
PURPOSE: To investigate dynamic coronary MR angiography using hyperpolarized water as a positive contrast agent. Hyperpolarization can increase the signal by several orders of magnitude, and has recently been translated to human cardiac application. The aim was to achieve large 1 H signal enhancement to allow high-resolution imaging of the coronary arteries. METHODS: Protons in D2 O were hyperpolarized by dissolution dynamic nuclear polarization. A total of 18 mL of hyperpolarized water was injected into the coronary arteries of healthy pigs (N = 9; 3 injections in 3 animals)...
January 12, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29324282/influence-of-glycan-modification-on-igg1-biochemical-and-biophysical-properties
#9
Jake W Pawlowski, Adriana Bajardi-Taccioli, Damian Houde, Marina Feschenko, Tyler Carlage, Igor A Kaltashov
Monoclonal antibodies (mAbs) are the fastest growing class of biopharmaceuticals. The specific therapeutic tasks vary among different mAbs, which may include neutralization of soluble targets, activation of cytotoxic pathways, targeted drug delivery, and diagnostic imaging. The specific therapeutic goal defines which interactions of the antibody with its multiple physiological partners are most critical for function, and which ones are irrelevant or indeed detrimental. In this work, we explored the ability of the glycan chains to affect IgG1 interaction with two key receptor families, FcRn and γ-type Fc receptors, as well as the influence of glycan composition on the conformation and stability of the antibody molecule...
January 3, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29323620/enhanced-visible-light-photocatalytic-activity-of-n-f-codoped-tio2-powders-with-high-thermal-stability
#10
Shu-Mei Xia, Yan-Qing Zhang, Ya-Fang Zheng, Chang-Song Xu, Guang-Min Liu
Doping non-metals into TiO2 has been regarded as a promising way to gain more effective photocatalyst. In this paper, N, F-codoped TiO2 was synthesized by sol-gel method, demonstrating both high adsorption capacity and high photocatalytic activity under visible light irradiation. Samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectra (UV-vis DRS ). The results show that N, F-codoping can reduce the impact of calcination temperature on the structure and morphology of the sample, and then the sample exhibits good thermal stability, even when the calcination temperature changes in a large range ,instead of rutile, the anatase around 20 nm is the only phase in N, F-codoped samples...
January 11, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29319708/thermally-induced-alloying-processes-in-a-bimetallic-system-at-the-nanoscale-agau-sub-5-nm-core-shell-particles-studied-at-atomic-resolution
#11
Maximilian Lasserus, Martin Schnedlitz, Daniel Knez, Roman Messner, Alexander Schiffmann, Florian Lackner, Andreas W Hauser, Ferdinand Hofer, Wolfgang E Ernst
Alloying processes in nanometre-sized Ag@Au and Au@Ag core@shell particles with average radii of 2 nm are studied via high resolution Transmission Electron Microscopy (TEM) imaging on in situ heatable carbon substrates. The bimetallic clusters are synthesized in small droplets of superfluid helium under fully inert conditions. After deposition, they are monitored during a heating cycle to 600 K and subsequent cooling. The core-shell structure, a sharply defined feature of the TEM High-Angle Annular Dark-Field images taken at room temperature, begins to blur with increasing temperature and transforms into a fully mixed alloy around 573 K...
January 10, 2018: Nanoscale
https://www.readbyqxmd.com/read/29318290/ordering-effects-and-percolation-in-the-structure-formation-process-of-the-oriented-polyolefin-porous-films
#12
Galina Kazimirovna Elyashevich, Dmitrii Vladimirovich Novikov, Ivan Sergeevich Kuryndin, Andreja Jelen, Vili Bukošek
Structure transitions and mechanism of the formation of superlattices lamellae in microporous polyolefin (polyethylene and polypropylene) films obtained in the process based on polymer melt extrusion followed by annealing, uniaxial extension and thermal fixation have been studied by statistical analysis of electron microscopy images of the film surface. The structure of the porous films prepared in the multistage process has been studied by SEM, gravimetry and permeability measurements. It has been shown that the pore formation at the stage of uniaxial extension is accompanied by the ordering of lamellae and their self-organization controlled by spin draw ratio and annealing temperature...
December 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29316453/degradable-rhenium-trioxide-nanocubes-with-high-localized-surface-plasmon-resonance-absorbance-like-gold-for-photothermal-theranostics
#13
Wenlong Zhang, Guoying Deng, Bo Li, Xinxin Zhao, Tao Ji, Guosheng Song, Zhiyin Xiao, Qing Cao, Jingbo Xiao, Xiaojuan Huang, Guoqiang Guan, Rujia Zou, Xinwu Lu, Junqing Hu
The applications of inorganic theranostic agents in clinical trials are generally limited to their innate non-biodegradability and potential long-term biotoxicity. To address this problem, herein via a straightforward and tailored space-confined on-substrate route, we obtained rhenium trioxide (ReO3) nanocubes (NCs) that display a good biocompatibility and biosafety. Importantly, their aqueous dispersion has high localized surface plasmon resonance (LSPR) absorbance in near-infrared (NIR) region different from previous report, which possibly associates with the charge transfer and structural distortion in hydrogen rhenium bronze (HxReO3), as well as ReO3's cubic shape...
December 27, 2017: Biomaterials
https://www.readbyqxmd.com/read/29310889/how-hot-are-they-neural-correlates-of-genital-arousal-an-infrared-thermographic-and-functional-magnetic-resonance-imaging-study-of-sexual-arousal-in-men-and-women
#14
Mayte Parada, Marina Gérard, Kevin Larcher, Alain Dagher, Yitzchak M Binik
BACKGROUND: The few studies that have examined the neural correlates of genital arousal have focused on men and are methodologically hard to compare. AIM: To investigate the neural correlates of peripheral physiologic sexual arousal using identical methodology for men and women. METHODS: 2 groups (20 men, 20 women) viewed movie clips (erotic, humor) while genital temperature was continuously measured using infrared thermal imaging. Participants also continuously evaluated changes in their subjective arousal and answered discrete questions about liking the movies and wanting sexual stimulation...
January 5, 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29306882/similarity-of-chest-x-ray-and-thermal-imaging-of-focal-pneumonia-a-randomised-proof-of-concept-study-at-a-large-urban-teaching-hospital
#15
Linda T Wang, Robert H Cleveland, William Binder, Robert G Zwerdling, Caterina Stamoulis, Thomas Ptak, Mindy Sherman, Kenan Haver, Pallavi Sagar, Patricia Hibberd
OBJECTIVE: To assess the diagnostic accuracy of thermal imaging (TI) in the setting of focal consolidative pneumonia with chest X-ray (CXR) as the gold standard. SETTING: A large, 973-bed teaching hospital in Boston, Massachusetts. PARTICIPANTS: 47 patients enrolled, 15 in a training set, 32 in a test set. Age range 10 months to 82 years (median=50 years). MATERIALS AND METHODS: Subjects received CXR with subsequent TI within 4 hours of each other...
January 5, 2018: BMJ Open
https://www.readbyqxmd.com/read/29306849/verbal-learning-and-memory-outcome-in-selective-amygdalohippocampectomy-versus-temporal-lobe-resection-in-patients-with-hippocampal-sclerosis
#16
Mette Thrane Foged, Kirsten Vinter, Louise Stauning, Troels W Kjær, Brice Ozenne, Sándor Beniczky, Olaf B Paulson, Flemming Find Madsen, Lars H Pinborg
PURPOSE: With the advent of new very selective techniques like thermal laser ablation to treat drug-resistant focal epilepsy, the controversy of resection size in relation to seizure outcome versus cognitive deficits has gained new relevance. The purpose of this study was to test the influence of the selective amygdalohippocampectomy (SAH) versus nonselective temporal lobe resection (TLR) on seizure outcome and cognition in patients with mesial temporal lobe epilepsy (MTLE) and histopathological verified hippocampal sclerosis (HS)...
January 4, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29304152/combination-of-near-infrared-and-thermal-imaging-techniques-for-the-remote-and-simultaneous-measurements-of-breathing-and-heart-rates-under-sleep-situation
#17
Menghan Hu, Guangtao Zhai, Duo Li, Yezhao Fan, Huiyu Duan, Wenhan Zhu, Xiaokang Yang
To achieve the simultaneous and unobtrusive breathing rate (BR) and heart rate (HR) measurements during nighttime, we leverage a far-infrared imager and an infrared camera equipped with IR-Cut lens and an infrared lighting array to develop a dual-camera imaging system. A custom-built cascade face classifier, containing the conventional Adaboost model and fully convolutional network trained by 32K images, was used to detect the face region in registered infrared images. The region of interest (ROI) inclusive of mouth and nose regions was afterwards confirmed by the discriminative regression and coordinate conversions of three selected landmarks...
2018: PloS One
https://www.readbyqxmd.com/read/29304099/functional-magnetic-resonance-imaging-reveals-differences-in-brain-activation-in-response-to-thermal-stimuli-in-diabetic-patients-with-and-without-diabetic-peripheral-neuropathy
#18
Juan Li, Wanying Zhang, Xia Wang, Tangmi Yuan, Peiyao Liu, Tao Wang, Le Shen, Yuguang Huang, Naishi Li, Hui You, Tixian Xiao, Feng Feng, Chao Ma
INTRODUCTION: Diabetes affects both the peripheral and central nervous systems. The aim of this study was to explore the changes in brain activity in response to thermal stimuli in diabetic patients with and without diabetic peripheral neuropathy (DPN) using functional magnetic resonance imaging (fMRI). METHODS: A total of 36 right-handed volunteers were enrolled: eight patients with Type-2 diabetes mellitus and DPN, 13 patients with Type-2 diabetes mellitus lacking DPN (NDPN patients), and 15 healthy volunteers (HV)...
2018: PloS One
https://www.readbyqxmd.com/read/29301705/an-automated-approach-to-enhance-the-thermographic-evaluation-on-orofacial-regions-in-lateral-facial-thermograms
#19
Jaspreet Singh, Ajat Shatru Arora
Segmentation of characteristic facial regions has often been an initial step of thermographic analysis in face recognition and clinical diagnosis. Moreover, fast and accurate thermographic analysis on characteristic areas is highly reliant on segmentation approach. Usually, frontal and lateral projections are used to capture the facial thermograms. The significant role of lateral facial thermography to diagnose the various problems associated with orofacial regions has been remarkable in many studies. So far, no study has presented an automatic approach for the segmentation of characteristic areas in lateral facial thermograms...
January 2018: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29301692/using-thermography-as-a-diagnostic-tool-for-omphalitis-on-newborn-calves
#20
C L Shecaira, C H Seino, J A Bombardelli, G A Reis, E J Fusada, M R Azedo, F J Benesi
The objective was to verify if thermography is able to detect inflammatory signs on the skin surface by comparing the umbilical region of healthy calves and calves presenting omphalitis. Twenty healthy calves (control group) had their lateral umbilical region and abdominal region examined with a thermal imaging camera in order to obtain a regional thermograph. The thermographic examination was then performed on 27 calves (Omphalitis group) presenting omphalitis diagnosed by physical examination. The maximum temperature of the lateral umbilical region in calves (aged < 30 days) was 35...
January 2018: Journal of Thermal Biology
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