keyword
MENU ▼
Read by QxMD icon Read
search

rcf

keyword
https://www.readbyqxmd.com/read/28047833/th-cd-bra-06-magnetic-field-effects-on-gafchromic-film-response-in-mr-igrt
#1
F Reynoso, A Curcuru, O Green, S Mutic, I Das, L Santanam
PURPOSE: To investigate the effects of magnetic fields in radiochromic films (RCF). Magnetokinetic changes may affect crystal orientation and polymerization within active layer of RCF, these effects are investigated in Magnetic Resonance Image-guided Radiotherapy (MR-IGRT). METHODS: Gafchromic EBT2 RCF were irradiated in a 30×30×30 cm(3) solid water phantom using a ViewRay MRIdian Co-60 MRI guided radiotherapy system (B=0.35 T). Fifteen 20.3×25.4 cm(2) EBT2 film sheets were placed at three different depths (d=0...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047758/su-f-t-570-comparison-of-synthetic-diamond-microionization-chamber-and-radiochromic-film-for-absolute-dosimetry-of-vmat-radiosurgery
#2
R Popple, X Wu, J Kraus, E Thomas, I Brezovich
PURPOSE: Patient specific quality assurance of stereotactic radiosurgery (SRS) plans is challenging because of small target sizes and high dose gradients. We compared three detectors for dosimetry of VMAT SRS plans. METHODS: The dose at the center of seventeen targets was measured using a synthetic diamond detector (2.2 mm diameter, 1 µm thickness), a 0.007 cm(3) ionization chamber, and radiochromic film. Measurements were made in a PMMA phantom in the clinical geometry - all gantry and table angles were delivered as planned...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043549/effect-of-time-duration-of-digestion-decontamination-technique-on-yield-of-mycobacteria-and-contamination-rates-from-sterile-body-fluids-pleural-and-ascitic-fluid-and-pus-specimens
#3
Samreen Shafiq, Faryal Saleem, Kauser Jabeen, Joveria Farooqi, Warda Alam, Sadia Hanif, Shazia Ali, Sadia Shakoor, Rumina Hasan
BACKGROUND: Duration of digestion/decontamination has a considerable impact on yield of mycobacteria especially from sterile body fluids and pus specimens. Additionally, duration of digestion/decontamination affects the contamination rates. This study evaluates the effect of digestion/decontamination protocol for 15 and 20min versus inoculation of media directly from the sample on contamination rates as well as the yield of mycobacteria from pus and sterile fluids other than cerebrospinal fluids...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28025826/concurrent-use-of-continuous-and-pulsatile-flow-ventricular-assist-device-on-a-fontan-patient-a-simulation-study
#4
Arianna Di Molfetta, Gianfranco Ferrari, Roberta Iacobelli, Sergio Filippelli, Antonio Amodeo
The aim of this work is to develop and test a lumped parameter model of the cardiovascular system to simulate the concurrent use of pulsatile (PVAD) and continuous flow (CVAD) ventricular assist device (VAD) on Fontan patients. Echocardiographic and hemodynamic data of five Fontan patients were retrospectively collected and used to simulate the patients' baseline hemodynamics. Then, for each patient, the following assistance modality was simulated for the cavopulmonary and the single ventricle (SV): (a) CVAD for cavopulmonary assistance (RCF) and PVAD assisting the SV (LCF) (RPF + LCF), (b) CVAD assisting SV and PVAD for cavopulmonary assistance (LPF + RCF)...
December 26, 2016: Artificial Organs
https://www.readbyqxmd.com/read/28004588/2015-annual-report-of-the-american-association-of-poison-control-centers-national-poison-data-system-npds-33rd-annual-report
#5
James B Mowry, Daniel A Spyker, Daniel E Brooks, Ashlea Zimmerman, Jay L Schauben
INTRODUCTION: This is the 33rd Annual Report of the American Association of Poison Control Centers' (AAPCC) National Poison Data System (NPDS). As of 1 January 2015, 55 of the nation's poison centers (PCs) uploaded case data automatically to NPDS. The upload interval was 9.52 [7.40, 13.6] (median [25%, 75%]) minutes, creating a near real-time national exposure and information database and surveillance system. METHODS: We analyzed the case data tabulating specific indices from NPDS...
December 2016: Clinical Toxicology
https://www.readbyqxmd.com/read/27976911/accelerated-sedimentation-velocity-assessment-for-nanowires-stabilized-in-a-non-newtonian-fluid
#6
Chia-Wei Chang, Ying-Chih Liao
In this work, the long-term stability of titanium oxide nanowire suspensions was accessed by an accelerated sedimentation with centrifugal forces. Titanium oxide (TiO2) nanoparticle (NP) and nanowire (NW) dispersions were prepared, and their sizes were carefully characterized. To replace the time-consuming visual observation, sedimentation velocities of the TiO2 NP and NW suspensions were measured using an analytical centrifuge. For an aqueous TiO2 NP suspension, the measured sedimentation velocities were linearly dependent on the relative centrifugal forces (RCF), as predicted by the classical Stokes law...
December 27, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27934964/mitigate-cascading-failures-on-networks-using-a-memetic-algorithm
#7
Xianglong Tang, Jing Liu, Xingxing Hao
Research concerning cascading failures in complex networks has become a hot topic. However, most of the existing studies have focused on modelling the cascading phenomenon on networks and analysing network robustness from a theoretical point of view, which considers only the damage incurred by the failure of one or several nodes. However, such a theoretical approach may not be useful in practical situation. Thus, we first design a much more practical measure to evaluate the robustness of networks against cascading failures, termed Rcf...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27908161/technical-note-magnetic-field-effects-on-gafchromic-film-response-in-mr-igrt
#8
Francisco J Reynoso, Austen Curcuru, Olga Green, Sasa Mutic, Indra J Das, Lakshmi Santanam
PURPOSE: Magnetokinetic changes may affect crystal orientation and polymerization within the active layer of radiochromic film (RCF). This effect is investigated in a magnetic resonance image-guided radiotherapy unit within the context of film dosimetry. METHODS: Gafchromic EBT2 RCF was irradiated in a 30 × 30 × 30 cm(3) solid water phantom using a Co-60 MRI guided radiotherapy system (B = 0.35 T) under normal operating conditions, and under the exact conditions and setup without a magnetic field...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27808307/calculations-of-the-active-mode-and-energetic-barrier-to-electron-attachment-to-cf3-and-comparison-with-kinetic-modeling-of-experimental-results
#9
Huixian Han, Benjamin Alday, Nicholas S Shuman, Justin P Wiens, Jürgen Troe, Albert A Viggiano, Hua Guo
To provide a deeper understanding of the kinetics of electron attachment to CF3, the six-dimensional potential energy surfaces of both CF3 and CF3(-) were developed by fitting ∼3000 ab initio points per surface at the AE-CCSD(T)-F12a/AVTZ level using the permutation invariant polynomial-neural network (PIP-NN) approach. The fitted potential energy surfaces for CF3 and CF3(-) had root mean square fitting errors relative to the ab initio calculations of 1.2 and 1.8 cm(-1), respectively. The main active mode for the crossing between the two potential energy surfaces was identified as the umbrella bending mode of CF3 in C3v symmetry...
November 16, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27774338/quantification-of-cell-free-dna-in-red-blood-cell-units-in-different-whole-blood-processing-methods
#10
Andrew W Shih, Vinai C Bhagirath, Nancy M Heddle, Jason P Acker, Yang Liu, John W Eikelboom, Patricia C Liaw
Background. Whole blood donations in Canada are processed by either the red cell filtration (RCF) or whole blood filtration (WBF) methods, where leukoreduction is potentially delayed in WBF. Fresh WBF red blood cells (RBCs) have been associated with increased in-hospital mortality after transfusion. Cell-free DNA (cfDNA) is released by neutrophils prior to leukoreduction, degraded during RBC storage, and is associated with adverse patient outcomes. We explored cfDNA levels in RBCs prepared by RCF and WBF and different storage durations...
2016: Journal of Blood Transfusion
https://www.readbyqxmd.com/read/27771938/uv-associated-decline-in-systemic-folate-implications-for-human-nutrigenetics-health-and-evolutionary-processes
#11
Mark Lucock, Emma Beckett, Charlotte Martin, Patrice Jones, John Furst, Zoe Yates, Nina G Jablonski, George Chaplin, Martin Veysey
OBJECTIVES: The purpose of this study was to examine whether UV exposure alters folate status according to C677T-MTHFR genotype, and to consider the relevance of this to human health and the evolutionary model of skin pigmentation. METHODS: Total Ozone Mapping Spectrometer (TOMS) satellite data were used to examine surface UV-irradiance, as a marker of UV exposure, in a large (n = 649) Australian cross-sectional study population. PCR/RFLP analysis was used to genotype C677T-MTHFR...
October 22, 2016: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/27753292/trying-to-remember-effort-mediates-the-relationship-between-frequency-of-cannabis-use-and-memory-performance
#12
Rayna B Hirst, Kaitlyn R Young, Louise M Sodos, Robert E Wickham, Mitch Earleywine
INTRODUCTION: While many studies suggest that regular cannabis use leads to deficits in cognitive functioning, particularly in memory, few have measured effort put forth during testing, and none have examined this as a potential mediator. Both age of onset of regular cannabis use and frequency of use have been linked to increased risk of memory deficits. The present study sought to determine whether effort mediated the relationship between frequency or age of onset of cannabis use and learning and memory performance...
October 18, 2016: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/27718275/performance-of-zdock-and-irad-in-capri-rounds-28-34
#13
Thom Vreven, Brian G Pierce, Tyler M Borrman, Zhiping Weng
We report the performance of our protein-protein docking pipeline, including the ZDOCK rigid-body docking algorithm, on 19 targets in CAPRI rounds 28-34. Following the docking step, we reranked the ZDOCK predictions using the IRAD scoring function, pruned redundant predictions, performed energy landscape analysis, and utilized our interface prediction approach RCF. In addition, we applied constraints to the search space based on biological information that we culled from the literature, which increased the chance of making a correct prediction...
October 7, 2016: Proteins
https://www.readbyqxmd.com/read/27662906/overlapping-role-of-respiratory-supercomplex-factor-rcf2-and-its-n-terminal-homolog-rcf3-in-saccharomyces-cerevisiae
#14
Katharina Römpler, Tobias Müller, Lisa Juris, Mirjam Wissel, Milena Vukotic, Kay Hofmann, Markus Deckers
The mitochondrial electron transport chain consists of individual protein complexes arranged into large macromolecular structures, termed respiratory chain supercomplexes or respirasomes. In the yeast Saccharomyces cerevisiae, respiratory chain supercomplexes form by association of the bc1 complex with the cytochrome c oxidase. Formation and maintenance of these assemblies are promoted by specific respiratory supercomplex factors, the Rcf proteins. For these proteins a regulatory function in bridging the electron transfer within supercomplexes has been proposed...
November 4, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27609492/spot-measurement-of-heart-rate-based-on-morphology-of-photoplethysmographic-ppg-signals
#15
P Madhan Mohan, V Nagarajan, J C Vignesh
Due to increasing health consciousness among people, it is imperative to have low-cost health care devices to measure the vital parameters like heart rate and arterial oxygen saturation (SpO2). In this paper, an efficient heart rate monitoring algorithm based on the morphology of photoplethysmography (PPG) signals to measure the spot heart rate (HR) and its real-time implementation is proposed. The algorithm does pre-processing and detects the onsets and systolic peaks of the PPG signal to estimate the heart rate of the subject...
February 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27561478/development-of-a-novel-cellulose-duck-feather-composite-fibre-regenerated-in-ionic-liquid
#16
Rasike De Silva, Xungai Wang, Nolene Byrne
By blending cellulose and duck feather in the common solvent 1-allyl-3-methylimidazoloium chloride, a regenerated composite fibre has been developed with improved fibres over regenerated cellulose fibres (RCF). The mechanical properties of composite fibre was shown to be better than RCF with a 63.7% improvement in tensile strain. Here, we thoroughly characterise the composite fibre and show that the composite fibre has many advantages over RCFs both from a spinning perspective and as a regenerated fibre.
November 20, 2016: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27524008/ovine-tendon-collagen-extraction-characterisation-and-fabrication-of-thin-films-for-tissue-engineering-applications
#17
M B Fauzi, Y Lokanathan, B S Aminuddin, B H I Ruszymah, S R Chowdhury
Collagen is the most abundant extracellular matrix (ECM) protein in the human body, thus widely used in tissue engineering and subsequent clinical applications. This study aimed to extract collagen from ovine (Ovis aries) Achilles tendon (OTC), and to evaluate its physicochemical properties and its potential to fabricate thin film with collagen fibrils in a random or aligned orientation. Acid-solubilized protein was extracted from ovine Achilles tendon using 0.35M acetic acid, and 80% of extracted protein was measured as collagen...
November 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27508731/-op-5a-04-evaluation-of-retinal-microperfusion-and-arteriolar-structure-in-patients-with-fibromuscular-dysplasia-the-preliminary-data-of-the-polish-registry-for-fibromuscular-dysplasia
#18
E Warchol-Celinska, M Gosk-Przybylek, J Harazny, E Binczyk, K Szymanek, K Hanus, K Jozwik-Plebanek, E Florczak, A Prejbisz, I Cendrowska-Demkow, P Dobrowolski, A Klisiewicz, I Kurkowska-Jastrzebska, B Blazejewska-Hyzorek, M Januszewicz, I Michalowska, J P Szaflik, R E Schmieder, J Szaflik, A Januszewicz
OBJECTIVE: To compare retinal microperfusion and arteriolal structure between patients with fibromuscular dysplasia (FMD) enrolled to the ARCADIA-POL registry and patients with essential hypertension (EHT). DESIGN AND METHOD: From the first 84 patients with confirmed FMD in any vascular bed enrolled in the ARCADIA-POL registry in 2015 (instituted on the basis of as Polish-French collaboration), we analyzed data regarding retinal microperfusion and arteriolar structure available from 70 patients (51F, 19 M, mean age: 41...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27475550/absolute-dosimetric-characterization-of-gafchromic-ebt3-and-hdv2-films-using-commercial-flat-bed-scanners-and-evaluation-of-the-scanner-response-function-variability
#19
S N Chen, M Gauthier, M Bazalova-Carter, S Bolanos, S Glenzer, R Riquier, G Revet, P Antici, A Morabito, A Propp, M Starodubtsev, J Fuchs
Radiochromic films (RCF) are commonly used in dosimetry for a wide range of radiation sources (electrons, protons, and photons) for medical, industrial, and scientific applications. They are multi-layered, which includes plastic substrate layers and sensitive layers that incorporate a radiation-sensitive dye. Quantitative dose can be retrieved by digitizing the film, provided that a prior calibration exists. Here, to calibrate the newly developed EBT3 and HDv2 RCFs from Gafchromic™, we used the Stanford Medical LINAC to deposit in the films various doses of 10 MeV photons, and by scanning the films using three independent EPSON Precision 2450 scanners, three independent EPSON V750 scanners, and two independent EPSON 11000XL scanners...
July 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27459984/laparoscopic-assisted-rectal-surgery-for-rectal-cancer-using-the-simple-rectum-catcher-device-with-an-intraoperative-colonoscopy-results-of-our-hospital-study-in-203-patients
#20
Akiyo Matsumoto, Kaida Arita
BACKGROUND: The gold standard of rectal surgery is TME and DST anastomosis.1 (-) 6 The division of mesorectum in tumor-specific mesorectal and total mesorectal excisions is one of the most difficult procedures of anterior dissection. We have developed a laparoscopic-assisted anterior dissection technique using the simple Rectum Catcher device (RC) with an intraoperative colonoscopy (CF).7 (,) 8 METHODS: Surgical and oncological outcomes were compared between 99 patients undergoing a laparoscopic approach with the RC and a CF (RCF) and 104 patients undergoing the laparoscopic approach without the RC and without a CF (NRCF)...
November 2016: Annals of Surgical Oncology
keyword
keyword
82490
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"