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https://www.readbyqxmd.com/read/27913089/a-combined-one-stage-surgical-approach-of-orbital-tumor-debulking-lid-reconstruction-and-ptosis-repair-in-children-with-orbitotemporal-neurofibromatosis
#1
Shay Keren, Gad Dotan, Ran Ben-Cnaan, Leah Leibovitch, Igal Leibovitch
BACKGROUND AND AIM: To describe a series of children with neurofibromatosis type 1 (NF1) and a plexiform neurofibroma of the orbit with ptosis who underwent a combined one-stage surgery for tumor debulking, lid reconstruction, and ptosis repair. METHODS: A retrospective review of 6 cases of combined one-step surgeries for orbital plexiform neurofibroma with ptosis. RESULTS: The study included 6 children (4 boys, mean age 3.4 years). Follow-up time was at least 9 months...
November 11, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/27911542/higher-loop-amplitude-monodromy-relations-in-string-and-gauge-theory
#2
Piotr Tourkine, Pierre Vanhove
The monodromy relations in string theory provide a powerful and elegant formalism to understand some of the deepest properties of tree-level field theory amplitudes, like the color-kinematics duality. This duality has been instrumental in tremendous progress on the computations of loop amplitudes in quantum field theory, but a higher-loop generalization of the monodromy construction was lacking. In this Letter, we extend the monodromy relations to higher loops in open string theory. Our construction, based on a contour deformation argument of the open string diagram integrands, leads to new identities that relate planar and nonplanar topologies in string theory...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27911355/effectiveness-and-safety-of-large-gel-particle-hyaluronic-acid-with-lidocaine-for-correction-of-midface-volume-deficit-or-contour-deficiency-erratum
#3
(no author information available yet)
No abstract text is available yet for this article.
October 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/27910429/automated-analysis-of-hot-spot-x-ray-images-at-the-national-ignition-facility
#4
S F Khan, N Izumi, S Glenn, R Tommasini, L R Benedetti, T Ma, A Pak, G A Kyrala, P Springer, D K Bradley, R P J Town
At the National Ignition Facility, the symmetry of the hot spot of imploding capsules is diagnosed by imaging the emitted x-rays using gated cameras and image plates. The symmetry of an implosion is an important factor in the yield generated from the resulting fusion process. The x-ray images are analyzed by decomposing the image intensity contours into Fourier and Legendre modes. This paper focuses on the additional protocols for the time-integrated shape analysis from image plates. For implosions with temperatures above ∼4 keV, the hard x-ray background can be utilized to infer the temperature of the hot spot...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909956/docking-and-three-dimensional-quantitative-structure-activity-relationship-analyses-of-imidazole-and-thiazolidine-derivatives-as-aurora-a-kinase-inhibitors
#5
Chaeuk Im
Aurora A kinase is involved in the inactivation of apoptosis leading to ovarian, breast, colon, and pancreatic cancers. Inhibitors of Aurora A kinase promote aberrant mitosis resulting in arrest at a pseudo G1 state to induce mitotic catastrophe, ultimately leading to apoptosis. In this study, ligand-based and docking-based three-dimensional quantitative structure-activity relationship (3D-QSAR) analyses of imidazole and thiazolidine derivatives as potential Aurora A kinase inhibitors were performed. The results provided highly reliable and predictive 3D-QSAR comparative molecular similarity index analysis (CoMSIA) models with a cross-validated q(2) value of 0...
December 1, 2016: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/27908914/muscle-mania-the-quest-for-the-perfect-body
#6
Maira Hameed, Ajay Sahu, Maria B Johnson
We describe the case of a young man with repeated hospital presentations for a variety of symptoms related to excessive bodybuilding and associated behaviours. He presented to our department (radiology) with right arm pain and loss of function. Ultrasound showed complete triceps rupture, rare in young patients and multiple cystic areas within the muscles of the arm. MRI revealed these to be multiple proteinaceous lesions within the muscle bellies and the possibility of self-innoculation was raised by the reporting radiologist...
December 1, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27908182/prostate-deformation-from-inflatable-rectal-probe-cover-and-dosimetric-effects-in-prostate-seed-implant-brachytherapy
#7
Jun Lian, Yeqin Shao, Larry D Potter, Ronald C Chen, Jordan A Holmes, Eleanor A Pryser, Jie Shen, Dinggang Shen, Andrew Z Wang
PURPOSE: Prostate brachytherapy is an important treatment technique for patients with localized prostate cancer. An inflatable rectal ultrasound probe cover is frequently utilized during the procedure to adjust for unfavorable prostate position relative to the implant grid. However, the inflated cover causes prostate deformation, which is not accounted for during dosimetric planning. Most of the therapeutic dose is delivered after the procedure when the prostate and surrounding organs-at-risk are less deformed...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27908181/defining-and-assessing-an-anisotropic-delineation-margin-for-modern-radiotherapy
#8
L R Bell, E M Pogson, P E Metcalfe, L C Holloway
PURPOSE: Uncertainty in target volume delineation for modern radiotherapy impacts dosimetry and patient outcomes. Delineation uncertainty is generally overlooked in practice as a source of error, potentially since historically, other uncertainties have been the main focus. This work defined and assessed an anisotropic delineation margin in both polar and spherical coordinate systems in order to account for the spatially varying nature of this uncertainty using a whole breast radiotherapy cohort as a proof of concept...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27908154/mass-detection-in-digital-breast-tomosynthesis-deep-convolutional-neural-network-with-transfer-learning-from-mammography
#9
Ravi K Samala, Heang-Ping Chan, Lubomir Hadjiiski, Mark A Helvie, Jun Wei, Kenny Cha
PURPOSE: Develop a computer-aided detection (CAD) system for masses in digital breast tomosynthesis (DBT) volume using a deep convolutional neural network (DCNN) with transfer learning from mammograms. METHODS: A data set containing 2282 digitized film and digital mammograms and 324 DBT volumes were collected with IRB approval. The mass of interest on the images was marked by an experienced breast radiologist as reference standard. The data set was partitioned into a training set (2282 mammograms with 2461 masses and 230 DBT views with 228 masses) and an independent test set (94 DBT views with 89 masses)...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27908108/dual-hydrogen-bonding-motifs-in-complexes-formed-between-tropolone-and-formic-acid
#10
Deacon J Nemchick, Michael K Cohen, Patrick H Vaccaro
The near-ultraviolet π(*)←π absorption system of weakly bound complexes formed between tropolone (TrOH) and formic acid (FA) under cryogenic free-jet expansion conditions has been interrogated by exploiting a variety of fluorescence-based laser-spectroscopic probes, with synergistic quantum-chemical calculations built upon diverse model chemistries being enlisted to unravel the structural and dynamical properties of the pertinent ground [X̃(1)A(')] and excited [Ã(1)A(')π(*)π] electronic states. For binary TrOH ⋅ FA adducts, the presence of dual hydrogen-bond linkages gives rise to three low-lying isomers designated (in relative energy order) as INT, EXT1, and EXT2 depending on whether docking of the FA ligand to the TrOH substrate takes place internal or external to the five-membered reaction cleft of tropolone...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27908034/the-effect-of-the-helicotrema-on-low-frequency-loudness-perception
#11
Carlos Jurado, Torsten Marquardt
Below approximately 40 Hz, the cochlear travelling wave reaches the apex, and differential pressure is shunted through the helicotrema, reducing hearing sensitivity. Just above this corner frequency, a resonance feature is often observed in objectively measured middle-ear-transfer functions (METFs). This study inquires whether overall and fine structure characteristics of the METF are also perceptually evident. Equal-loudness-level contours (ELCs) were measured between 20 and 160 Hz for 14 subjects in a purpose-built test chamber...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27907861/in-situ-time-lapse-study-of-extracellular-polymeric-substance-discharge-in-streptococcus-mutans-biofilm
#12
Bernard Haochih Liu, Li-Chieh Yu
Streptococcus mutans is one of the main pathogens that cause tooth decay. By metabolizing carbohydrates, S. mutans emits extracellular polymeric substance (EPS) that adheres to the tooth surface and forms layers of biofilm. Periodontal disease occurs due to the low pH environment created by S. mutans biofilm, and such an acidic environment gradually erodes tooth enamel. Since the existence of EPS is essential in the formation of biofilm, the in-situ investigation of its generation and distribution in real time is the key to the control and suppression of S...
November 24, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27906816/intraocular-pressure-measurements-after-descemet-membrane-endothelial-keratoplasty
#13
Anna-Karina B Maier, Enken Gundlach, Milena Pahlitzsch, Johannes Gonnermann, Caitlin Corkhill, Eckart Bertelmann, Antonia M Joussen, Matthias K J Klamann, Necip Torun
PURPOSE: Intraocular pressure (IOP) elevation occurs regularly after Descemet membrane endothelial keratoplasty (DMEK). This study evaluated the effect of central corneal thickness (CCT) on the IOP after DMEK. PATIENTS AND METHODS: This prospective study recorded the IOP of 46 eyes from 46 patients preoperatively, and then 1 and 3 months after DMEK. IOP measurement was performed by noncontact pneumatic tonometry (NCT), iCare, Goldmann applanation tonometry (GAT), and dynamic contour tonometry (DCT)...
November 30, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27906810/a-comparative-analysis-of-goldmann-tonometry-correction
#14
Magdalena Asejczyk-Widlicka, Wieslaw Srodka, Barbara K Pierscionek
PURPOSE: The measurement of intraocular pressure (IOP) by Goldmann applanation tonometry (GAT) is based on assumptions about corneal parameters. To correct for variations in corneal curvature and thickness, a number of equations have been proposed. This study evaluates the in vivo accuracy of these equations from individuals with primary open-angle glaucoma and compared them with measurements taken using the Pascal dynamic contour tonometer (DCT), which makes no assumptions about the corneal geometry or biomechanics...
November 30, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27906367/cultivation-of-lemon-fields
#15
Sushanta Kumar Pal, P Senthilkumaran
The sign rule requires that adjacent singularities on a contour have opposite signs and hence cultivation of lemon only fields poses problem as all lemons have positive index. In this paper we show that the interference of three linearly polarized plane waves can create regions of ellipse and vector fields in 2-dimensions (2D) in which a lemon lattice is interlaced in a V-point lattice. The lemons appear at intensity maxima of the lattice structure while the V-points take care of index conservation by sitting at intensity minima...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27906275/near-core-structure-of-a-propagating-optical-vortex
#16
Priyanka Lochab, P Senthilkumaran, Kedar Khare
We study the propagation of a charge-1 vortex beam using the angular spectrum method. While vortex beams are commonly assumed to have a helical wavefront, it is well known that the phase of the vortex in the near-core region varies arbitrarily quickly. In order to explain the wavefront behavior in the near-core region, ideas such as evanescent fields or superoscillatory functions have been used before. Our study using the angular spectrum method can inherently take into account the propagating as well as evanescent spatial frequencies and is able to provide the detailed wavefront structure as the vortex wavefront evolves...
December 1, 2016: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/27906105/pancreatic-metastases-from-ocular-malignant-melanoma-the-use-of-endoscopic-ultrasound-guided-fine-needle-aspiration-to-establish-a-definitive-cytologic-diagnosis-a-case-report
#17
Diogo Turiani Hourneaux De Moura, Danielle Azevedo Chacon, Ryan Tanigawa, Martin Coronel, Spencer Cheng, Éverson L A Artifon, José Jukemura, Eduardo Guimarães Hourneaux De Moura
BACKGROUND: When encountering solid pancreatic lesions, nonpancreatic primary metastases are rare and differentiating a metastasis from a primary neoplastic lesion is challenging. The clinical presentation and radiologic features can be similar and the possibility of a pancreatic metastasis should be considered when the patient refers to a history of a different primary cancer. Endoscopic ultrasound offers a key anatomical advantage in accessing the pancreas and endoscopic ultrasound-guided fine-needle aspiration has become the gold standard method for diagnosing pancreatic lesions...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27904733/intraoperative-templating-in-lateral-meniscal-allograft-transplantation
#18
Bong-Seok Yang, Nam-Hong Choi, Byeong-Yeon Kim
Recently, studies have emphasized the importance of anatomical placement of the lateral meniscal allograft to decrease postoperative extrusion. However, it is infeasible to identify the exact rotation of the allograft during transplantation. We present a patient who underwent a lateral meniscal transplantation using a wire for correct positioning of the allograft. The use of a wire intraoperatively shaped to resemble the contour of the lateral meniscal allograft will aid in more accurate and anatomical graft placement...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27904452/virtual-modelling-of-novel-applicator-prototypes-for-cervical-cancer-brachytherapy
#19
Primoz Petric, Robert Hudej, Noora Al-Hammadi, Barbara Segedin
BACKGROUND: Standard applicators for cervical cancer Brachytherapy (BT) do not always achieve acceptable balance between target volume and normal tissue irradiation. We aimed to develop an innovative method of Target-volume Density Mapping (TDM) for modelling of novel applicator prototypes with optimal coverage characteristics. Patients and methods. Development of Contour-Analysis Tool 2 (CAT-2) software for TDM generation was the core priority of our task group. Main requests regarding software functionalities were formulated and guided the coding process...
December 1, 2016: Radiology and Oncology
https://www.readbyqxmd.com/read/27903195/dosimetric-effects-of-onyx-embolization-on-gamma-knife-arteriovenous-malformation-dose-distributions
#20
David J Schlesinger, Håkan Nordström, Anders Lundin, Zhiyuan Xu, Jason P Sheehan
OBJECTIVE Patients with arteriovenous malformations (AVMs) treated with Gamma Knife radiosurgery (GKRS) subsequent to embolization suffer from elevated local failure rates and differences in adverse radiation effects. Onyx is a common embolic material for AVMs. Onyx is formulated with tantalum, a high atomic number (Z = 73) element that has been investigated as a source of dosimetric uncertainty contributing to the less favorable clinical results. However, prior studies have not modeled the complicated anatomical and beam geometries characteristic of GKRS...
December 2016: Journal of Neurosurgery
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