keyword
MENU ▼
Read by QxMD icon Read
search

Topography guided

keyword
https://www.readbyqxmd.com/read/28078333/topography-guided-buckling-of-swollen-polymer-bilayer-films-into-three-dimensional-structures
#1
Joonwoo Jeong, Yigil Cho, Su Yeon Lee, Xingting Gong, Randall D Kamien, Shu Yang, A G Yodh
Thin films that exhibit spatially heterogeneous swelling often buckle into the third dimension to minimize stress. These effects, in turn, offer a promising strategy to fabricate complex three-dimensional structures from two-dimensional sheets. Here we employ surface topography as a new means to guide buckling of swollen polymer bilayer films and thereby control the morphology of resulting three-dimensional objects. Topographic patterns are created on poly(dimethylsiloxane) (PDMS) films selectively coated with a thin layer of non-swelling parylene on different sides of the patterned films...
January 12, 2017: Soft Matter
https://www.readbyqxmd.com/read/28072805/anatomical-variants-of-the-pudendal-nerve-observed-during-a-transgluteal-surgical-approach-in-a-population-of-patients-with-pudendal-neuralgia
#2
Stephane Ploteau, Marie-Aimee Perrouin-Verbe, Jean-Jacques Labat, Thibault Riant, Amelie Levesque, Roger Robert
BACKGROUND: Several studies have described the course and anatomical relations of the pudendal nerve. Several surgical nerve decompression techniques have been described, but only the transgluteal approach has been validated by a prospective randomized clinical trial. The purpose of this study was to describe the course of the nerve and its variants in a population of patients with pudendal neuralgia in order to guide the surgeon in the choice of surgical approach for pudendal nerve decompression...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28068440/a-prospective-study-to-compare-visual-outcomes-between-wavefront-optimized-and-topography-guided-ablation-profiles-in-contralateral-eyes-with-myopia
#3
Rohit Shetty, Rushad Shroff, Kalyani Deshpande, Roshan Gowda, Sumeet Lahane, Chaitra Jayadev
PURPOSE: To analyze refractive outcomes of wavefront-optimized (WFO) ablation and topography-guided custom ablation (TCAT) profiles using the Allegretto Wave excimer laser platform (Alcon Laboratories, Inc., Fort Worth, TX) in the treatment of myopia. METHODS: Sixty eyes of 30 patients who underwent LASIK were included in this prospective interventional study. WFO ablation was performed in one eye (WFO group) and TCAT in the fellow eye (TCAT group). The WaveLight FS200 femtosecond laser (Alcon Laboratories, Inc...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28060075/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#4
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
February 2017: Cornea
https://www.readbyqxmd.com/read/28024363/hierarchical-metal-oxide-topographies-replicated-from-highly-textured-graphene-oxide-by-intercalation-templating
#5
Po-Yen Chen, Muchun Liu, Thomas M Valentin, Zhongying Wang, Ruben Spitz Steinberg, Jaskiranjeet Sodhi, Ian Y Wong, Robert H Hurt
Confined assembly in the intersheet gallery spaces of two-dimensional (2D) materials is an emerging templating route for creation of ultrathin material architectures. Here, we demonstrate a general synthetic route for transcribing complex wrinkled and crumpled topographies in graphene oxide (GO) films into textured metal oxides. Intercalation of hydrated metal ions into textured GO multilayer films followed by dehydration, thermal decomposition, and air oxidation produces Zn, Al, Mn, and Cu oxide films with high-fidelity replication of the original GO textures, including "multi-generational", multiscale textures that have been recently achieved through extreme graphene compression...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28018671/accelerated-corneal-collagen-cross-linking-using-topography-guided-uv-a-energy-emission-preliminary-clinical-and-morphological-outcomes
#6
Cosimo Mazzotta, Antonio Moramarco, Claudio Traversi, Stefano Baiocchi, Alfonso Iovieno, Luigi Fontana
Purpose. To assess the clinical and morphological outcomes of topography-guided accelerated corneal cross-linking. Design. Retrospective case series. Methods. 21 eyes of 20 patients with progressive keratoconus were enrolled. All patients underwent accelerated cross-linking using an ultraviolet-A (UVA) exposure with an energy release varying from 7.2 J/cm(2) up to 15 J/cm(2), according to the topographic corneal curvature. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity, topography, in vivo confocal microscopy (IVCM), and anterior segment optic coherence tomography (AS-OCT) were evaluated preoperatively and at the 1, 3, 6, and 12 months postoperatively...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28005329/quantitative-three-dimensional-characterization-of-block-copolymer-directed-self-assembly-on-combined-chemical-and-topographical-prepatterned-templates
#7
Tamar Segal-Peretz, Jiaxing Ren, Shisheng Xiong, Gurdaman Khaira, Alec Bowen, Leonidas E Ocola, Ralu Divan, Manolis Doxastakis, Nicola J Ferrier, Juan de Pablo, Paul F Nealey
Characterization of the three-dimensional (3D) structure in directed self-assembly (DSA) of block copolymers is crucial for understanding the complex relationships between the guiding template and the resulting polymer structure so DSA could be successfully implemented for advanced lithography applications. Here, we combined scanning transmission electron microscopy (STEM) tomography and coarse-grain simulations to probe the 3D structure of P2VP-b-PS-b-P2VP assembled on prepatterned templates using solvent vapor annealing...
January 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/27980046/pet-quantification-of-the-norepinephrine-transporter-in-human-brain-with-s-s-18f-fmener-d2
#8
Sho Moriguchi, Yasuyuki Kimura, Masanori Ichise, Ryosuke Arakawa, Harumasa Takano, Chie Seki, Yoko Ikoma, Keisuke Takahata, Tomohisa Nagashima, Makiko Yamada, Masaru Mimura, Tetsuya Suhara
: Norepinephrine transporter (NET) in the brain plays important roles in human cognition and the pathophysiology of psychiatric disorders. Two radioligands, (S,S)-(11)C-MRB and (S,S)-(18)F-FMeNER-D2, have been used for imaging NETs in the thalamus and midbrain (including locus coeruleus) using positron emission topography (PET) in humans. However, NET density in the equally important cerebral cortex has not been well quantified because of unfavorable kinetics with (S,S)-(11)C-MRB and defluorination with (S,S)-(18)F-FMeNER-D2, which can complicate NET quantification in the cerebral cortex adjacent to the skull containing defluorinated (18)F radioactivity...
December 15, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27918353/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#9
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
December 1, 2016: Cornea
https://www.readbyqxmd.com/read/27899371/refractive-improvements-and-safety-with-topography-guided-corneal-crosslinking-for-keratoconus-1-year-results
#10
Maria Nordström, Maria Schiller, Anneli Fredriksson, Anders Behndig
PURPOSE: To assess the refractive improvements and the corneal endothelial safety of an individualised topography-guided regimen for corneal crosslinking in progressive keratoconus. METHODS: An open-label prospective randomised clinical trial was performed at the Department of Clinical Sciences, Ophthalmology, Umeå University Hospital, Umeå, Sweden. Thirty-seven patients (50 eyes) with progressive keratoconus planned for corneal crosslinking were included. The patients were randomised to topography-guided crosslinking (photorefractive intrastromal crosslinking (PiXL); n=25) or uniform 9 mm crosslinking (corneal collagen crosslinking (CXL); n=25)...
November 29, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27898448/laser-vision-correction-in-treating-myopia
#11
Germano Leal Ehlke, Ronald R Krueger
Myopia is a generally benign refractive error with an increasing prevalence worldwide. It can be corrected temporarily with glasses and contact lenses and permanently with laser vision correction. The 2 main procedures currently being performed for myopia correction are photorefractive keratectomy and laser-assisted in situ keratomileusis. Each technique has its advantages, but they appear to yield similar visual outcomes 1 year after surgery. Laser vision correction for myopia was considered a paradigm shift because healthy eyes could now undergo a surgical procedure to permanently and safely correct the error by altering the center of the cornea, which was previously off limits because of the potential for loss of transparency...
November 2016: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/27898297/a-novel-pfib-sample-preparation-protocol-for-correlative-3d-x-ray-cnt-and-fib-tof-sims-tomography
#12
Agnieszka Priebe, Guillaume Audoit, Jean-Paul Barnes
We present a novel sample preparation method that allows correlative 3D X-ray Computed Nano-Tomography (CNT) and Focused Ion Beam Time-Of-Flight Secondary Ion Mass Spectrometry (FIB-TOF-SIMS) tomography to be performed on the same sample. In addition, our invention ensures that samples stay unmodified structurally and chemically between the subsequent experiments. The main principle is based on modifying the topography of the X-ray CNT experimental setup before FIB-TOF-SIMS measurements by incorporating a square washer around the sample...
November 19, 2016: Ultramicroscopy
https://www.readbyqxmd.com/read/27888100/harnessing-wharton-s-jelly-stem-cell-differentiation-into-bone-like-nodule-on-calcium-phosphate-substrate-without-osteoinductive-factors
#13
S Mechiche Alami, H Rammal, C Boulagnon-Rombi, F Velard, F Lazar, R Drevet, D Laurent Maquin, S C Gangloff, J Hemmerlé, J C Voegel, G Francius, P Schaaf, F Boulmedais, H Kerdjoudj
: An important aim of bone regenerative medicine is to design biomaterials with controlled chemical and topographical features to guide stem cell fate towards osteoblasts without addition of specific osteogenic factors. Herein, we find that sprayed bioactive and biocompatible calcium phosphate substrates (CaP) with controlled topography induce, in a well-orchestrated manner, Wharton's jelly stem cells (WJ-SCs) differentiation into osteoblastic lineage without any osteogenic supplements...
November 22, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27843292/topography-modified-refraction-tmr-adjustment-of-treated-cylinder-amount-and-axis-to-the-topography-versus-standard-clinical-refraction-in-myopic-topography-guided-lasik
#14
Anastasios John Kanellopoulos
PURPOSE: To evaluate the safety, efficacy, and contralateral eye comparison of topography-guided myopic LASIK with two different refraction treatment strategies. SETTING: Private clinical ophthalmology practice. PATIENTS AND METHODS: A total of 100 eyes (50 patients) in consecutive cases of myopic topography-guided LASIK procedures with the same refractive platform (FS200 femtosecond and EX500 excimer lasers) were randomized for treatment as follows: one eye with the standard clinical refraction (group A) and the contralateral eye with the topographic astigmatic power and axis (topography-modified treatment refraction; group B)...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27837120/recommendations-for-high-risk-clinical-target-volume-definition-with-computed-tomography-for-three-dimensional-image-guided-brachytherapy-in-cervical-cancer-patients
#15
Tatsuya Ohno, Masaru Wakatsuki, Takafumi Toita, Yuko Kaneyasu, Ken Yoshida, Shingo Kato, Noriko Li, Sunao Tokumaru, Hitoshi Ikushima, Takashi Uno, Shin-Ei Noda, Tomoko Kazumoto, Yoko Harima
Our purpose was to develop recommendations for contouring the computed tomography (CT)-based high-risk clinical target volume (CTVHR) for 3D image-guided brachytherapy (3D-IGBT) for cervical cancer. A 15-member Japanese Radiation Oncology Study Group (JROSG) committee with expertise in gynecological radiation oncology initiated guideline development for CT-based CTVHR (based on a comprehensive literature review as well as clinical experience) in July 2014. Extensive discussions occurred during four face-to-face meetings and frequent email communication until a consensus was reached...
November 10, 2016: Journal of Radiation Research
https://www.readbyqxmd.com/read/27824375/visual-outcomes-after-lasik-using-topography-guided-vs-wavefront-guided-customized-ablation-systems
#16
Ikuko Toda, Takeshi Ide, Teruki Fukumoto, Kazuo Tsubota
PURPOSE: To evaluate the visual performance of two customized ablation systems (wavefront-guided ablation and topography-guided ablation) in LASIK. METHODS: In this prospective, randomized clinical study, 68 eyes of 35 patients undergoing LASIK were enrolled. Patients were randomly assigned to wavefront-guided ablation using the iDesign aberrometer and STAR S4 IR Excimer Laser system (Abbott Medical Optics, Inc., Santa Ana, CA) (wavefront-guided group; 32 eyes of 16 patients; age: 29...
November 1, 2016: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/27824280/the-combined-effect-of-substrate-stiffness-and-surface-topography-on-chondrogenic-differentiation-of-mesenchymal-stem-cells
#17
Yingnan Wu, Zheng Yang, Jaslyn Bee Khuan Law, Ai Yu He, Azlina A Abbas, Vinitha Denslin, Tunku Kamarul, James H P Hui, Eng Hin Lee
Stem cell differentiation is guided by contact with the physical microenvironment, influence by both topography and mechanical properties of the matrix. In this study, the combined effect of substratum nano-topography and mechanical stiffness in directing mesenchymal stem cell (MSC) chondrogenesis was investigated. Three polyesters of varying stiffness were thermally imprinted to create nano-grating or pillar patterns of the same dimension. The surface of the nano-patterned substrate was coated with chondroitin sulfate (CS) to provide an even surface chemistry, with cell-adhesive and chondro-inductive properties, across all polymeric substrates...
January 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27819793/in-depth-tem-characterization-of-block-copolymer-pattern-transfer-at-germanium-surfaces
#18
Cian Cummins, Timothy W Collins, Roisin A Kelly, Eoin K McCarthy, Michael A Morris
Dry plasma etching for the pattern transfer of mask features is fundamental to semiconductor processing and the development of device and electrically conducting elements becomes more challenging as features reach the deep nanoscale regime. In this work, high resolution transmission electron microscopy (TEM) coupled with energy dispersive x-ray (EDX) characterization were used to analyze the pattern transfer of graphoepitaxially aligned block copolymer (BCP) features to germanium (Ge) substrates as a function of time...
December 2, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27805532/visual-rehabilitation-after-penetrating-keratoplasty
#19
Leyla Asena, Dilek D Altınörs
OBJECTIVES: Here, our aim was to report our treatment strategies and their results performed for visual rehabilitation after penetrating keratoplasty. MATERIALS AND METHODS: The medical records of 98 patients (54 male/44 female), with results from 104 eyes, who underwent penetrating keratoplasty between January 2013 and January 2015 at the Baskent University Faculty of Medicine, Department of Ophthalmology were reviewed. Patient age, indication for penetrating keratoplasty, interventions performed for visual rehabilitation, follow-up duration, topographic and refractive astigmatism at the end of follow-up, and final best corrected visual acuity results were recorded...
2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27789947/effects-of-nanoporous-anodic-titanium-oxide-on-human-adipose-derived-stem-cells
#20
Katarzyna Malec, Joanna Góralska, Magdalena Hubalewska-Mazgaj, Paulina Głowacz, Magdalena Jarosz, Pawel Brzewski, Grzegorz D Sulka, Marian Jaskuła, Iwona Wybrańska
The aim of current bone biomaterials research is to design implants that induce controlled, guided, successful, and rapid healing. Titanium implants are widely used in dental, orthopedic, and reconstructive surgery. A series of studies has indicated that cells can respond not only to the chemical properties of the biomaterial, but also, in particular, to the changes in surface topography. Nanoporous materials remain in focus of scientific queries due to their exclusive properties and broad applications. One such material is nanostructured titanium oxide with highly ordered, mutually perpendicular nanopores...
2016: International Journal of Nanomedicine
keyword
keyword
102688
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"