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Assessing progression of keratoconus: novel tomographic determinants

Eye and Vision 2016年第1期3卷 49-57页

作者： Joshua K.Duncan Michael W.Belin mark borgstrom Department of Ophthalmology&Vision Science University of ArizonaTucsonAZUSA University of Arizona University Information Technology ServicesTucsonAZUSA

Several methods have been described in the literature to both evaluate and document progression in keratoconus,but there is no consistent or clear definition of ectasia *** authors describe how modern corneal tomography,including both anterior and posterior elevation and pachymetric data can be used to screen for ectatic progression,and how software programs such as the Enhanced Reference Surface and the Belin-Ambrosio Enhanced Ectasia Display(BAD)can be employed to detect earlier ***,in order to describe specific quantitative values that can be used as progression determinants,the normal noise measurement of the three parameters(corneal thickness at the thinnest point,anterior and posterior radius of curvature(ARC,PRC)taken from the 3.0 mm optical zone centered on the thinnest point),was *** values were obtained by imaging five normal patients using three different technicians on three separate *** 95%and 80%one-sided confidence intervals for all three parameters were surprisingly small(7.88/4.03μm for corneal thickness,0.024/0.012 mm for ARC,and 0.083/0.042 mm for PRC),suggesting that they may perform well as progression determinants.

关键词： Keratoconus Tomography Ectatic disease Progression Amsler-Krumeich Scheimpflug Collagen cross-linking

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Neurodevelopmental Outcomes of Extremely Premature Infants with Extremely Low and Very Low Birth Weight at Three Years of Age: A Retrospective Study

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Open Journal of Pediatrics 2023年第3期13卷 333-346页

作者： Eileen Romer McGrath mark borgstrom Elias Adrian Ramirez-Moreno Jennie Jacob Steele Children’s Research Center College of Medicine The University of Arizona Tucson USA University Information Technology Services The University of Arizona Tucson USA Diamond Children’s Banner Medical Center Tucson USA

Introduction: The purpose of this retrospective study is to identify medical conditions impacting neurodevelopmental outcomes of extremely low birth weight and very low birth weight preterm infants at three years of age. Methods: Infants born in Banner Diamond Children’s University Medical Center, receiving services in the Newborn Intensive Care Unit, and attending Neonatal Developmental Follow-Up Clinic were identified. Participants received developmental assessment and follow-up from August 2012 through December 2018. Relevant clinical conditions during initial hospital stay and up to three years of age were obtained by reviewing medical and developmental records. Bayley Scales of Infant Toddler Development (Bayley III) was used to evaluate skill development at 6, 9, 12, 18, 24, 30, 36 months. Results: Data analysis did not reveal significant p-values;it did demonstrate that some predictor variables impact neurodevelopmental outcomes in cognitive, language and motor skill development. Conclusion: This retrospective study reports significant association between birth weight and low cognitive scores. Correlations were also found between gestational age and Total Language, and the longer an infant stayed in the NICU, the poorer the Total Language Scaled Scores at 8 to 12 months, 15 to 18 months, and 24 to 36 months. Birth weight was found to be the greatest predictor of poor motor scores.

关键词： Extremely Preterm Extremely Low Birth Weight Very Preterm Very Low Birth Weight Neurodevelopmental Outcomes Early Intervention

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Growth and optical properties of InxGa1-xP nanowires synthesized by selective-area epitaxy

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Nano Research 2017年第2期10卷 672-682页

作者： Alexander Berg Philippe Caroff Naeem Shahid mark N. Lockrey Xiaoming Yuan Magnus T. borgstrom Hark Hoe Tan Chennupati Jagadish Solid State Physics and NanoLund Lund University Box 118 SE-221 00 Lund Sweden Department of Electronic Materials Engineering Research School of Physics and Engineering The Australian National University Canberra ACT2601 Australia Australian National Fabrication Facility Research School of Physics and Engineering The Australian National University Canberra ACT 2601 Australia

Ternary III-V nanowires （NWs） cover a wide range of wavelengths in the solar spectrum and would greatly benefit from being synthesized as position-controlled arrays for improved vertical yield, reproducibility, and tunable optical absorption. Here, we report on successful selective-area epitaxy of metal-particle-free vertical InxGa1-xP NW arrays using metal-organic vapor phase epitaxy and detail their optical properties. A systematic growth study establishes the range of suitable growth parameters to obtain uniform NW growth over a large array. The optical properties of the NWs were characterized by room-temperature cathodoluminescence spectroscopy. Tunability of the emission wavelength from 870 nm to approximately 800 nm was achieved. Transmission electron microscopy and energy dispersive X-ray measurements performed on cross- section samples revealed a pure wurtzite crystal structure with very few stacking faults and a slight composition gradient along the NW growth axis.

关键词： nanowire InGaP selective-area epitaxy cathodoluminescence energy-dispersive X-ray spectroscopy

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