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#1
J Cheung, J Cunha, A Sudhyadhom, C McGuinness, M Roach, M Descovich
PURPOSE: Robotic radiosurgery is a salvage treatment option for patients with recurrent prostate cancer. We explored the feasibility of tracking the bolus of permanent prostate implants (PPI) using image recognition software optimized to track spinal anatomy. METHODS: Forty-five inert iodine seeds were implanted into a gelatin-based prostate phantom. Four superficial gold seeds were inserted to provide ground-truth alignment. A CT scan of the phantom (120 kVp, 1 mm slice thickness) was acquired and a single-energy iterative metal artifact reduction (MAR) algorithm was used to enhance the quality of the DRR used for tracking...
June 2016: Medical Physics
#2
V Wu, M Epelman, K Brock, M Feng, R Ten Haken, M Matuszak
PURPOSE: Interfraction changes in abdominal SBRT patient anatomy are challenging to address with image guidance alone because avoidance of an overlapping high-priority gastrointestinal normal structure may come at the expense of tumor coverage. This work investigates the benefit of anticipating interfraction motion and exploiting favorable geometries at the time of treatment through dose adaptive planning. METHODS: Beyond no change, six scenarios of duodenum shifts per fraction are generated (±1 cm XYZ) and sample five-fraction paths (combinations of no and/or the indicated changes) are simulated...
June 2016: Medical Physics
#3
Henriëtte Elisabeth Bakker, Thijs Herman Besseling, Judith Elisabethgertrudajosephin Wijnhoven, Peter H Helfferich, Alfons van Blaaderen, Arnout Imhof
The electrophoretic mobility and the zeta-potential ($\zeta$) of fluorescently labeled colloidal silica rods, with an aspect-ratio of 3.8 and 6.1 were determined with micro-electrophoresis measurements using confocal microscopy. In case the colloidal particles all move at the same speed parallel to the direction of the electric field we record an $xyz$-stack over the whole depth of the capillary. This method is faster and more robust compared to taking $xyt$-series at different depths inside the capillary to obtain the parabolic flow profile, as was done in previous work from our group...
January 3, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
#4
Michal Mackiewicz, Casper F Andersen, Graham Finlayson
Hue plane preserving color correction (HPPCC), introduced by Andersen and Hardeberg [Proceedings of the 13th Color and Imaging Conference (CIC) (2005), pp. 141-146], maps device-dependent color values (RGB) to colorimetric color values (XYZ) using a set of linear transforms, realized by white point preserving 3×3 matrices, where each transform is learned and applied in a subregion of color space, defined by two adjacent hue planes. The hue plane delimited subregions of camera RGB values are mapped to corresponding hue plane delimited subregions of estimated colorimetric XYZ values...
November 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
#5
Stefano Dugheri, Alessandro Bonari, Ilenia Pompilio, Alessandro Monti, Nicola Mucci, Giulio Arcangeli
Hydrogen fluoride (HF) is a basic raw material for a wide variety of industrial products, with a worldwide production capacity of more than three million metric tonnes. A novel method for determining particulate fluoride and gaseous hydrogen fluoride in air is presented herewith. Air was sampled using miniaturised 13 mm Swinnex two-stage filter holders in a medium-flow pumping system and through the absorption of particulate fluoride and HF vapours on cellulose ester filters uncoated or impregnated with sodium carbonate...
2016: International Journal of Analytical Chemistry
#6
Marcus Ang, Yijun Cai, Anna C S Tan
Purpose. To describe a novel technique of adapting a swept-source optical coherence tomography angiography (OCTA) to image corneal vascularization. Methods. In this pilot cross-sectional study, we obtained 3 × 3 mm scans, where 100,000 A-scans are acquired per second with optical axial resolution of 8 μm and lateral resolution of 20 μm. This was performed with manual "XYZ" focus without the anterior segment lens, until the focus of the corneoscleral surface was clearly seen and the vessels of interest were in focus on the corresponding red-free image...
2016: Journal of Ophthalmology
#7
Andrea L Gold, Tomer Shechner, Madeline J Farber, Carolyn N Spiro, Ellen Leibenluft, Daniel S Pine, Jennifer C Britton
BACKGROUND: Amygdala-prefrontal cortex (PFC) functional connectivity may be influenced by anxiety and development. A prior study on anxiety found age-specific dysfunction in the ventromedial PFC (vmPFC), but not amygdala, associated with threat-safety discrimination during extinction recall (Britton et al.). However, translational research suggests that amygdala-PFC circuitry mediates responses following learned extinction. Anxiety-related perturbations may emerge in functional connectivity within this circuit during extinction recall tasks...
October 2016: Depression and Anxiety
#8
Neerupma Silswal, Julia Reis, Asaf A Qureshi, Christopher Papasian, Nilofer Qureshi
The molecular basis responsible for tolerance following inflammatory response to LPS is not well-understood. We hypothesized that inflammation/tolerance in monocytes/ macrophages is dependent on the proteases of proteasome. To test our hypothesis, first, we examined the expression of different proteasome subunits in different human and mouse monocytes/macrophages. Secondly, we investigated the effect of proteasome subunits/ proteases on LPS-induced expression of tumor necrosis factor-α (TNF-α) and nitric oxide (NO) during inflammation and tolerance using mouse RAW 264...
September 19, 2016: Shock
#9
Qian Cao, Xiaoxia Wan, Junfeng Li, Jingxing Liang
In this paper, we propose a new interim connection space (ICS) called LabLab, which is an updated version of LabPQR, to overcome the drawback that the last three dimensions of LabPQR have no definite colorimetric meanings. We extended and improved the method by which the first three dimensions of LabPQR are deduced to obtain an ICS consisting of two sets of CIELAB values under different illuminants, and the reconstructed spectra from LabLab were obtained by minimizing colorimetric errors by means of the computational formula of the CIE-XYZ tristimulus values combined with least-squares best fit...
September 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
#10
Longhua Yang, Åge A Skjevik, Wen-Ge Han Du, Louis Noodleman, Ross C Walker, Andreas W Götz
Cytochrome c oxidase (CcO) is a vital enzyme that catalyzes the reduction of molecular oxygen to water and pumps protons across mitochondrial and bacterial membranes. This article presents parameters for the cofactors of ba3-type CcO that are compatible with the all-atom Amber ff12SB and ff14SB force fields. Specifically, parameters were developed for the CuA pair, heme b, and the dinuclear center that consists of heme a3 and CuB bridged by a hydroperoxo group. The data includes geometries in XYZ coordinate format for cluster models that were employed to compute proton transfer energies and derive bond parameters and point charges for the force field using density functional theory...
September 2016: Data in Brief
#11
Norisato Tsuda, Kota Mitsui, Shinichiro Oda
The purpose of this study was to investigate the effect of the position in XYZ directions and acquisition parameters on the basic image qualities of for cone beam computed tomography (CBCT) in an angiography system with flat panel detector. The resolution property (modulation transfer function: MTF) and the noise property (Wiener spectrum: WS) of CBCT images in X-Y plane were measured with different acquisition parameters (scan matrix number and projection number) and the effect of the position in XYZ directions...
August 2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
#12
D L Campbell, I B Spielman
We theoretically explore a Rashba spin-orbit coupling scheme which operates entirely in the absolute ground state manifold of an alkali atom, thereby minimizing all inelastic processes. An energy gap between ground eigenstates of the proposed coupling can be continuously opened or closed by modifying laser polarizations. Our technique uses far-detuned 'Raman' laser coupling to create the Rashba potential, which has the benefit of low spontaneous emission rates. At these detunings, the Raman matrix elements that link m F magnetic sublevel quantum numbers separated by two are also suppressed...
March 2016: New Journal of Physics
#13
Asami Aida, Masatoshi Nakajima, Naoko Seki, Yukinori Kano, Richard M Foxton, Junji Tagami
This study aimed to investigate the effect of enamel margin configuration on color change of resin composite restoration. Enamel disks of 1.0 mm-thick were sliced from sixty bovine anterior teeth and divided into three groups by margin configuration (non-bevel, 45-degree bevel and 45-degree reverse-bevel). The color measurements (L*C*h* values) at the restored bovine enamel disk with resin composite (Estelite Asteria, Estelite Pro, Kalore, Clearfil Majesty) were performed using a digital camera with CIE XYZ color gamut (RC500)...
2016: Dental Materials Journal
#14
Chin W Yong
DL_F Notation is an easy-to-understand, standardized atom typesetting expression for molecular simulations for a range of organic force field (FF) schemes such as OPLSAA, PCFF, and CVFF. It is implemented within DL_FIELD, a software program that facilitates the setting up of molecular FF models for DL_POLY molecular dynamics simulation software. By making use of the Notation, a single core conversion module (the DL_F conversion Engine) implemented within DL_FIELD can be used to analyze a molecular structure and determine the types of atoms for a given FF scheme...
August 22, 2016: Journal of Chemical Information and Modeling
#15
Srdjan Čalošević, Kristijan Dinjar, Suzana Čalošević, Sven Kurbel, Robert Steiner
This study is aimed to estimate spatial variability of normal QRS loops trajectories in successive cardiac cycles analyzed in XYZ phase space among 27 young and 27 older subjects, both male and female. Among young subjects, 10 individuals were professional football players, while the remaining 17 were students without regular physical activities. Modified three-axial leads (Frank's lead system) were used continually to record high-resolution ECG (1 kHz sampling rate) at rest during 200 seconds by Biopac Student Lab System...
October 2016: General Physiology and Biophysics
#16
Casper Find Andersen, David Connah
Color correction relates device dependent sensor responses (RGB) to device independent color values (XYZ). Here we present a new approach to Hue-plane Preserving Color Correction (HPPCC) using weighted constrained 3 × 3 matrices. Hue-plane preservation was introduced in [1] in conjunction with an HPPCC method. That method maps using a finite number of local white point preserving 3 × 3 matrices, each of which operates in a hue-angle delimited subregion of device space defined by the white and two adjacent chromatic training set colors...
July 11, 2016: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
#17
Kate Grieve, Olivier Thouvenin, Abhishek Sengupta, Vincent M Borderie, Michel Paques
PURPOSE: To interpret full-field optical coherence tomography (FFOCT) images of ex vivo retina. METHODS: Flatmounted retinas of human, primate, pig, sheep, rat, and mouse were imaged using FFOCT. To identify retinal ganglion and amacrine cells, fixed samples immunolabeled against Tuj1 and Brn3a or live samples labeled in vitro with green fluorescent protein (GFP) were analyzed by combining FFOCT, fluorescence confocal microscopy (FCM), and fluorescence-FFOCT. To investigate postmortem tissue changes, time series were acquired over 48 hours and on fresh versus fixed tissue...
July 1, 2016: Investigative Ophthalmology & Visual Science
#18
Yuji Nashimoto, Yasufumi Takahashi, Yuanshu Zhou, Hidenori Ito, Hiroki Ida, Kosuke Ino, Tomokazu Matsue, Hitoshi Shiku
Information regarding spatial mRNA localization in single cells is necessary for a better understanding of cellular functions in tissues. Here, we report a method for evaluating localization of mRNA in single cells using double-barrel scanning ion conductance microscopy (SICM). Two barrels in a nanopipette were filled with aqueous and organic electrolyte solutions and used for SICM and as an electrochemical syringe, respectively. We confirmed that the organic phase barrel could be used to collect cytosol from living cells, which is a minute but sufficient amount to assess cellular status using qPCR analysis...
July 26, 2016: ACS Nano
#19
Jonatan Jacobsson, Rasmus Borgquist, Christian Reitan, Elyar Ghafoori, Neal A Chatterjee, Muammar Kabir, Pyotr G Platonov, Jonas Carlson, Jagmeet P Singh, Larisa G Tereshchenko
Cardiac resynchronization therapy (CRT) reduces mortality and morbidity in selected patients with heart failure (HF), but up to 1/3 of patients are nonresponders. Sum absolute QRST integral (SAI QRST) recently showed association with mechanical response on CRT. However, it is unknown whether SAI QRST is associated with all-cause mortality and HF hospitalizations in patients undergoing CRT. The study population included 496 patients undergoing CRT (mean age 69 ± 10 years, 84% men, 65% left bundle branch block [LBBB], left ventricular ejection fraction 23 ± 6%, 63% ischemic cardiomyopathy)...
August 1, 2016: American Journal of Cardiology
#20
Melody N Carney, William M Johnston
OBJECTIVES: Objectives of this study were to correlate RGB data from the VITA Linearguide 3D Master and VITA Bleached Guide 3D Master shade guides with their spectroradiometric correlates through a regression model while indicating a methodology for validation of accuracy of digital imaging systems. Additional objectives were to provide summary RGB data and to determine a relationship between lightness and RGB values for these shade guides. METHODS: Radiant energy measurements and images were taken with a Canon Rebel T3i and Macro Ring Lite MR-14EX for each shade tab...
August 2016: Journal of Dentistry
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