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https://www.readbyqxmd.com/read/27921170/effect-of-photon-initiated-photoacoustic-streaming-passive-ultrasonic-and-sonic-irrigation-techniques-on-dentinal-tubule-penetration-of-irrigation-solution-a-confocal-microscopic-study
#1
Merve Akcay, Hakan Arslan, Merve Mese, Nazlı Durmus, Ismail Davut Capar
OBJECTIVES: The aim of this in vitro study was to evaluate the efficacy of different irrigation techniques including laser-activated irrigation using an erbium:yttrium-aluminum-garnet (Er:YAG) laser with a novel tip design (photon-induced photoacoustic streaming (PIPS)), Er:YAG laser with Preciso tip, sonic activation, and passive ultrasonic activation on the final irrigation solution penetration into dentinal tubules by using a laser scanning confocal microscope. MATERIAL AND METHODS: In this study, 65 extracted single-rooted human mandibular premolars were instrumented up to size 40 and randomly divided into 5 groups (n = 13) based on the activation technique of the final irrigation solution as follows: conventional irrigation (control group), sonic activation, passive ultrasonic activation, Er:YAG-PIPS tip activation, and Er:YAG-Preciso tip activation...
December 5, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27921074/initial-performance-studies-of-a-wearable-brain-positron-emission-tomography-camera-based-on-autonomous-thin-film-digital-geiger-avalanche-photodiode-arrays
#2
Charles R Schmidtlein, James N Turner, Michael O Thompson, Krishna C Mandal, Ida Häggström, Jiahan Zhang, John L Humm, David H Feiglin, Andrzej Krol
Using analytical and Monte Carlo modeling, we explored performance of a lightweight wearable helmet-shaped brain positron emission tomography (PET), or BET camera, based on thin-film digital Geiger avalanche photodiode arrays with Lutetium-yttrium oxyorthosilicate (LYSO) or [Formula: see text] scintillators for imaging in vivo human brain function of freely moving and acting subjects. We investigated a spherical cap BET and cylindrical brain PET (CYL) geometries with 250-mm diameter. We also considered a clinical whole-body (WB) LYSO PET/CT scanner...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/27920418/endoscopic-treatment-of-bouverets-syndrome-in-an-extremely-elderly-patient-with-holmium-yag-laser
#3
Kao-Chi Chang, Wei-Ming Chen, Kuo-Liang Wei
: Bouveret's syndrome is a rare presentation of duodenal obstruction or gastric outlet obstruction caused by a large gallstone migrating through a cholecystoduodenal or choledochoduodenal fistula. Most patients are elderly and often have underlying comorbidities, complicating surgery. Endoscopic therapy should be used as first-line treatment for these patients who are not good surgical candidates. We report a case of a 98-year-old Chinese female who presented with vomiting for three days...
November 2016: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/27918005/a-review-of-melasma-treatment-focusing-on-laser-and-light-devices
#4
Janet Y Li, Elizabeth Rc Geddes, Deanne M Robinson, Paul M Friedman
Melasma is a pigmentary disorder of unclear etiology with numerous treatment options and high recurrence rates. Laser and light therapies may be utilized cautiously as second- or third-line options for recalcitrant melasma, but low-energy settings are preferred due to the risk of postinflammatory hyperpigmentation and melasma stimulation. Commonly used lasers include the low-fluence 1064-nm Q-switched neodymium-doped yttrium aluminum garnet laser, nonablative fractionated lasers, and intense pulsed light. Strict sun protection, concomitant use of bleaching agents, and maintenance treatments are necessary...
December 2016: Seminars in Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/27911554/thermal-spin-dynamics-of-yttrium-iron-garnet
#5
Joseph Barker, Gerrit E W Bauer
The magnetic insulator yttrium iron garnet can be grown with near perfection and is therefore and ideal conduit for spin currents. It is a complex material with 20 magnetic moments in the unit cell. In spite of being a ferrimagnet, YIG is almost always modeled as a simple ferromagnet with a single spin wave mode. We use the method of atomistic spin dynamics to study the temperature evolution of the full spin wave spectrum, in quantitative agreement with neutron scattering experiments. The antiferromagnetic or optical mode is found to suppress the spin Seebeck effect at room temperature and beyond due to thermally pumped spin currents with opposite polarization to the ferromagnetic mode...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27911528/berry-curvature-in-magnon-phonon-hybrid-systems
#6
Ryuji Takahashi, Naoto Nagaosa
We study theoretically the Berry curvature of the magnon induced by the hybridization with the acoustic phonons via the spin-orbit and dipolar interactions. We first discuss the magnon-phonon hybridization via the dipolar interaction, and show that the dispersions have gapless points in momentum space, some of which form a loop. Next, when both spin-orbit and dipolar interactions are considered, we show anisotropic texture of the Berry curvature and its divergence with and without gap closing. Realistic evaluation of the consequent anomalous velocity is given for yttrium iron garnet...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27910539/the-response-of-a-fast-scintillator-screen-yap-ce-to-low-energy-ions-0-40-kev-and-its-use-to-detect-fast-ion-loss-in-stellarator-tj-ii
#7
M Martínez, B Zurro, A Baciero, D Jiménez-Rey, V Tribaldos, M Malo, M T Crespo, D Muñoz
A systematic study of scintillation materials was undertaken to improve the time resolution of the fast ion diagnostic currently installed at TJ-II stellarator. It was found that YAP:Ce (formula YAlO3:Ce, Yttrium Aluminum Perovskite doped with Cerium) ionoluminescence offers better sensitivity and time response compared to the standard detector material, SrGa2S4:Eu (TG-Green), currently used in TJ-II. A comparison between both materials was carried out by irradiating them with H(+) ions of up to 40 keV using a dedicated laboratory setup...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910414/electron-cyclotron-emission-radiometer-upgrade-on-the-j-text-tokamak
#8
Z J Yang, X M Pan, X D Ma, B W Ruan, R B Zhou, C Zhang
To meet experimental requirements, the J-TEXT electron cyclotron emission (ECE) diagnostic is being upgraded. The front end antenna and transmission line have been modified and a new 8-channel W-band detecting unit has been developed. The improved ECE system will extend the frequency range from 94.5-124.5 GHz to 80.5-124.5 GHz. This will enable the system to cover the most plasma in the radius direction for BT = 1.8-2.2 T, and it even can cover almost the whole plasma range ρ = - 0.8-0.9 (minus means the high field side) at BT = 1...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27899164/nano-sized-cuboid-shaped-phase-in-mg-nd-y-alloy-and-its-behavior-during-isothermal-aging
#9
Jingxu Zheng, Zhongyuan Luo, Lida Tan, Bin Chen
In the present study, nano-sized cuboid-shaped particles in Mg-Nd-Y are studied by means of Cs-corrected atomic-scale high-angle annular dark-field scanning transmission electron microscopy. The structure of the cuboid-shaped phase is identified to be yttrium (major component) and neodymium atoms in face-centered cubic arrangement without the participation of Mg. The lattice parameter a=5.15 Å. During isothermal aging at 225°C, Mg3(Nd,Y) precipitates adhere to surface (100) planes of the cuboid-shaped particles with the orientation relationship: $[100]_{{{\rm Mg}_{{\rm 3}} {\rm RE}}} \,/\,\,/\,[100]_{{{\rm Cuboid}}} $ and $[310]_{{{\rm Mg}_{{\rm 3}} {\rm RE}}} \,/\,\,/\,[012]_{{{\rm Cuboid}}} $ ...
November 30, 2016: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/27890462/radiation-pneumonitis-following-hepatic-yttrium-90-radioembolization
#10
Horacio Matías Castro, Esteban Javier Wainstein, Joaquin Maritano Furcada
No abstract text is available yet for this article.
November 24, 2016: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/27885520/the-effect-of-pre-operative-topical-anaesthetic-cream-on-the-ablative-width-and-coagulative-depth-of-ablative-fractional-resurfacing-laser
#11
Preawphan Punyaratabandhu, Rungsima Wanitphakdeedecha, Penvadee Pattanaprichakul, Panitta Sitthinamsuwan, Weeranut Phothong, Sasima Eimpunth, Visnu Lohsiriwat, Woraphong Manuskiatti
Topical anaesthetic cream (TAC) is commonly used as a pre-treatment of ablative fractional resurfacing (AFR) laser. Most of anaesthetic cream contains distilled water as major component. Therefore, pre-operative TAC may interfere the photothermal reaction in the skin treated with fractional carbon-dioxide (FCO2) laser and fractional erbium-doped yttrium aluminium garnet (FEr:YAG) laser. The objective of the study was to compare the ablative width (AW) and coagulative depth (CD) of AFR laser with and without pre-treatment with TAC...
November 24, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27884683/yttrium-90-radioembolization-with-resin-microspheres-without-routine-embolization-of-the-gastroduodenal-artery
#12
Thomas J Ward, John D Louie, Daniel Y Sze
PURPOSE: To evaluate safety of resin microsphere radioembolization (RE) without prophylactic embolization of the gastroduodenal artery (GDA). MATERIALS AND METHODS: Between July 2013 and April 2015, all patients undergoing RE with resin microspheres for liver-dominant metastatic disease were treated without routine embolization of the GDA. Selective embolization of distal hepaticoenteric vessels was performed if identified by digital subtraction angiography, cone-beam computed tomography, or technetium-99m macroaggregated albumin scintigraphy...
November 21, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/27881586/iatrogenic-parafoveal-macular-hole-following-nd-yag-posterior-hyaloidotomy-for-premacular-haemorrhage
#13
Ravi Bypareddy, Rohan Chawla, Shorya Vardhan Azad, Brijesh Takkar
Premacular sub-internal limiting membrane (sub-ILM) haemorrhage is a known cause of sudden profound loss of vision. Neodymium-doped yttrium aluminium garnet (ND-YAG) posterior hyaloidotomy is an inexpensive, effective and safe treatment modality for rapid drainage of haemorrhage covering the macula. An 18-year-old male patient presented to us with a history of Nd-YAG posterior hyaloidotomy for Valsalva-related premacular bleed. At the posterior pole, a cavity formed by the detached ILM with a central defect in ILM-posterior hyaloid complex was evident...
November 23, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27878478/liver-resection-after-selective-internal-radiation-therapy-with-yttrium-90-is-safe-and-feasible-a-bi-institutional-analysis
#14
G Paul Wright, J Wallis Marsh, Manish K Varma, Michael G Doherty, David L Bartlett, Mathew H Chung
BACKGROUND: Treatment with yttrium-90 (Y90) microspheres has emerged as a viable liver-directed therapy for patients with unresectable tumors and those outside transplantation criteria. A select number of patients demonstrate a favorable response and become candidates for surgical resection. METHODS: Patients who underwent selective internal radiation therapy (SIRT) with Y90 microspheres at two institutions were reviewed. Patients who underwent liver resection were included in the study...
November 22, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27875761/prognostic-value-of-post-yttrium-90-radioembolization-therapy-18f-fluorodeoxyglucose-positron-emission-tomography-in-patients-with-liver-tumors
#15
Sebastian Obrzut, Kevin McCammack, Karam W Badran, Anthony Balistreri, Evan Ou, Brian J Nguyen, Carl K Hoh, Steven C Rose
OBJECTIVE: This study assessed the benefit of post-therapy (18)F-FDG PET/CT versus CT alone in identifying malignant liver tumor progression following radioembolization with Y-90 microspheres. METHODS: 24 patients with 44 liver tumors underwent CT imaging pre-radioembolization and PET/CT post-radioembolization. Predictive value of Response Evaluation Criteria in Solid Tumors (RECIST 1.1), The World Health Organization (WHO), mRECIST and European Association for the Study of the Liver (EASL) with PET/CT versus CT alone was assessed...
November 16, 2016: Clinical Imaging
https://www.readbyqxmd.com/read/27870679/new-developments-in-interventional-oncology-liver-metastases-from-colorectal-cancer
#16
Joseph R Kallini, Ahmed Gabr, Nadine Abouchaleh, Rehan Ali, Ahsun Riaz, Robert J Lewandowski, Riad Salem
Colorectal cancer is the third leading cause of cancer death in the United States. Although hepatic excision is the first-line treatment for colorectal liver metastasis (CRLM), few patients are candidates. Locoregional therapy (LRT) encompasses minimally invasive techniques practiced by interventional radiology. These include ablative treatments (radiofrequency ablation, microwave ablation, and cryosurgical ablation) and transcatheter intra-arterial therapy (hepatic arterial infusion chemotherapy, transarterial "bland" embolization, transarterial chemoembolization, and radioembolization with yttrium 90)...
November 2016: Cancer Journal
https://www.readbyqxmd.com/read/27868243/simulation-of-laser-tattoo-pigment-interaction-in-a-tissue-mimicking-phantom-using-q-switched-and-long-pulsed-lasers
#17
K J Ahn, B J Kim, S B Cho
BACKGROUND: Laser therapy is the treatment of choice in tattoo removal. However, the precise mechanisms of laser-tattoo pigment interactions remain to be evaluated. METHODS: We evaluated the geometric patterns of laser-tattoo pigment particle interactions using a tattoo pigment-embedded tissue-mimicking (TM) phantom. RESULTS: A Q-switched (QS) neodymium-doped yttrium aluminum garnet laser was used at settings of 532-, 660-, and 1064-nm wavelengths, single-pulse and quick pulse-to-pulse treatment modes, and spot sizes of 4 and 7 mm...
November 20, 2016: Skin Research and Technology
https://www.readbyqxmd.com/read/27861320/laser-interstitial-thermal-therapy-lighting-the-way-to-a-new-treatment-option-in-neurosurgery
#18
Roberto Diaz, Michael E Ivan, Simon Hanft, Steve Vanni, Glen Manzano, Jonathan Jagid, Ricardo J Komotar
LITT, laser interstitial therapyNd:YAG, neodymium-doped yttrium aluminum.
December 2016: Neurosurgery
https://www.readbyqxmd.com/read/27860373/investigation-of-methane-oxidation-reactions-over-lanthanum-manganites-pd-ysz-dual-bed-by-18o-labeling-drifts-coupling
#19
Melissandre Richard, Daniel Duprez, Nicolas Bion, Fabien Can
Low loading palladium supported yttrium-stabilized zirconia (0.2%wtPd/YSZ) and LaMnO3 perovskite were associated to study the partial oxidation of methane using labeled 18O2 in the gas phase. Synthesis gas production was demonstrated to occur via an indirect reaction where oxygen is first consumed in the total methane combustion. A Mars-Van-Krevelen mechanism was observed over Pd/YSZ at 425°C to yield C16O2 and C16O. A significant enhancement of the Pd/YSZ catalyst activity was achieved by the association of LaMnO3+Pd/YSZ in a dual catalyst bed...
November 9, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27858258/application-of-reflectance-confocal-microscopy-to-evaluate-skin-damage-after-irradiation-with-an-yttrium-scandium-gallium-garnet-ysgg-laser
#20
Xueping Yue, Hongwei Wang, Qing Li, Linfeng Li
The objective of this study was to observe the characteristics of the skin after irradiation with a 2790-nm yttrium-scandium-gallium-garnet (YSGG) laser using reflectance confocal microscopy (RCM). A 2790-nm YSGG laser was used to irradiate fresh foreskin (four doses, at spot density 3) in vitro. The characteristics of microscopic ablative columns (MAC), thermal coagulation zone (TCZ), and microscopic treatment zones (MTZ) were observed immediately after irradiation using digital microscope and RCM. The characteristics of MAC, TCZ, and MTZ with variations in pulse energy were comparatively analyzed...
November 17, 2016: Lasers in Medical Science
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