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https://www.readbyqxmd.com/read/28806613/automatic-blood-vessels-segmentation-based-on-different-retinal-maps-from-octa-scans
#1
Nabila Eladawi, Mohammed Elmogy, Omar Helmy, Ahmed Aboelfetouh, Alaa Riad, Harpal Sandhu, Shlomit Schaal, Ayman El-Baz
The retinal vascular network reflects the health of the retina, which is a useful diagnostic indicator of systemic vascular. Therefore, the segmentation of retinal blood vessels is a powerful method for diagnosing vascular diseases. This paper presents an automatic segmentation system for retinal blood vessels from Optical Coherence Tomography Angiography (OCTA) images. The system segments blood vessels from the superficial and deep retinal maps for normal and diabetic cases. Initially, we reduced the noise and improved the contrast of the OCTA images by using the Generalized Gauss-Markov random field (GGMRF) model...
August 7, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28806400/changes-in-the-anterior-segment-after-cycloplegia-with-a-biometer-using-swept-source-optical-coherence-tomography
#2
Tomoaki Higashiyama, Maki Iwasa, Masahito Ohji
The aim of this study was to investigate changes in the anterior segment of the eye after cycloplegia. A biometer combined with swept-source optical coherence tomography (SSOCT) was used for measurements. Patients with strabismus or amblyopia who underwent cycloplegia were included. The axial length, central corneal thickness, anterior chamber depth, and lens thickness were measured with the biometer-SSOCT system before and after cycloplegia. Altogether, 10 eyes of 10 patients (mean age 7.20 ± 3.08 years, range 4-14 years) were evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28806347/pediatric-pseudotumor-cerebri-syndrome
#3
Paul H Phillips, Claire A Sheldon
Idiopathic intracranial hypertension, otherwise known as primary pseudotumor cerebri syndrome (PTCS), most frequently occurs in obese women of childbearing age. However, children may be affected as well. This review will address recent findings regarding demographics, diagnosis, and treatment of pediatric PTCS. Prepubertal children with primary PTCS have an equal sex distribution and less frequent obesity compared with adult patients. However, female gender and obesity are risk factors for primary PTCS in postpubertal children...
September 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28806215/prevalence-of-vitreomacular-adhesion-in-patients-without-maculopathy-older-than-40-years
#4
Julie A Rodman, Diana Shechtman, Brad M Sutton, Joseph J Pizzimenti, Ava K Bittner
PURPOSE: To determine the prevalence and factors influencing vitreomacular adhesion (VMA) or vitreomacular traction (VMT) in subjects without maculopathy older than age 40 years. METHODS: In a prospective cross-sectional study, 1,950 eyes in 1,090 participants aged 40 to 89 years representing various ethnic groups from 14 centers in the United States underwent a comprehensive eye examination, including spectral domain optical coherence tomography. A team of independent, masked readers classified the presence or absence of VMA/VMT on spectral domain optical coherence tomography based on the International Vitreomacular Traction Study Group rubric...
August 10, 2017: Retina
https://www.readbyqxmd.com/read/28806214/choroidal-nevi-with-focal-choroidal-excavation-and-polypoidal-choroidal-neovascularization
#5
Daniel Simhaee, Rosa Dolz-Marco, K Bailey Freund
PURPOSE: To report two cases of choroidal nevi associated with focal choroidal excavation (FCE) and polypoidal choroidal neovascularization (PCN). METHODS: Report of two patients with choroidal nevi showing FCE and PCN who underwent multimodal imaging including color fundus photography, fluorescein angiography, indocyanine green angiography, fundus autofluorescence, spectral domain optical coherence tomography, swept-source optical coherence tomography, and optical coherence tomography angiography...
August 10, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28806213/maintenance-of-good-visual-acuity-in-best-disease-associated-with-chronic-bilateral-serous-macular-detachment
#6
Sarra Gattoussi, Camiel J F Boon, K Bailey Freund
PURPOSE: We describe the long-term follow-up of a patient with multifocal Best disease with chronic bilateral serous macular detachment and unusual peripheral findings associated with a novel mutation in the BEST1 gene. METHODS: Case report. RESULTS: A 59-year-old white woman was referred for an evaluation of her macular findings in 1992. There was a family history of Best disease in the patient's mother and a male sibling. Her medical history was unremarkable...
August 10, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28806189/the-use-of-optical-coherence-tomography-in-neuro-ophthalmology
#7
Noel C Y Chan, Carmen K M Chan
PURPOSE OF REVIEW: In the last decade, with the advances of optical coherence tomography (OCT) technology, different imaging protocols and analysis algorithms have been introduced to maximize the potential of this diagnostic tool in the evaluation of different eye diseases. This review aims to provide an update on these additional features, with respect to the management of a diverse range of neuro-ophthalmologic conditions. RECENT FINDINGS: Macular ganglion cell complex (mGCC) analysis has been shown to be superior to peripapillary retinal nerve fiber layer (pRNFL) analysis in certain settings, such as differentiating Leber's hereditary optic neuropathy from functional visual loss; monitoring neurodegenerative diseases or multiple sclerosis; and predicting visual loss in nonarteritic ischemic optic neuropathy...
August 12, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28805818/all-electric-control-of-donor-nuclear-spin-qubits-in-silicon
#8
Anthony J Sigillito, Alexei M Tyryshkin, Thomas Schenkel, Andrew A Houck, Stephen A Lyon
The electronic and nuclear spin degrees of freedom of donor impurities in silicon form ultra-coherent two-level systems that are potentially useful for applications in quantum information and are intrinsically compatible with industrial semiconductor processing. However, because of their smaller gyromagnetic ratios, nuclear spins are more difficult to manipulate than electron spins and are often considered too slow for quantum information processing. Moreover, although alternating current magnetic fields are the most natural choice to drive spin transitions and implement quantum gates, they are difficult to confine spatially to the level of a single donor, thus requiring alternative approaches...
August 14, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28805434/the-differential-influences-of-parenting-and-child-narrative-coherence-on-the-development-of-emotion-recognition
#9
Sara R Berzenski, Tuppett M Yates
The ability to recognize and label emotions serves as a building block by which children make sense of the world and learn how to interact with social partners. However, the timing and salience of influences on emotion recognition development are not fully understood. Path analyses evaluated the contributions of parenting and child narrative coherence to the development of emotion recognition across ages 4 through 8 in a diverse (50% female; 46% Hispanic, 18.4% Black, 11.2% White, .4% Asian, 24.0% multiracial) longitudinally followed sample of 250 caregiver-child dyads...
August 14, 2017: Developmental Psychology
https://www.readbyqxmd.com/read/28805401/the-common-sense-model-of-self-regulation-meta-analysis-and-test-of-a-process-model
#10
Martin S Hagger, Severine Koch, Nikos L D Chatzisarantis, Sheina Orbell
According to the common-sense model of self-regulation, individuals form lay representations of illnesses that guide coping procedures to manage illness threat. We meta-analyzed studies adopting the model to (a) examine the intercorrelations among illness representation dimensions, coping strategies, and illness outcomes; (b) test the sufficiency of a process model in which relations between illness representations and outcomes were mediated by coping strategies; and (c) test effects of moderators on model relations...
August 14, 2017: Psychological Bulletin
https://www.readbyqxmd.com/read/28805399/mind-matters-a-meta-analysis-on-parental-mentalization-and-sensitivity-as-predictors-of-infant-parent-attachment
#11
Moniek A J Zeegers, Cristina Colonnesi, Geert-Jan J M Stams, Elizabeth Meins
Major developments in attachment research over the past 2 decades have introduced parental mentalization as a predictor of infant-parent attachment security. Parental mentalization is the degree to which parents show frequent, coherent, or appropriate appreciation of their infants' internal states. The present study examined the triangular relations between parental mentalization, parental sensitivity, and attachment security. A total of 20 effect sizes (N = 974) on the relation between parental mentalization and attachment, 82 effect sizes (N = 6,664) on the relation between sensitivity and attachment, and 24 effect sizes (N = 2,029) on the relation between mentalization and sensitivity were subjected to multilevel meta-analyses...
August 14, 2017: Psychological Bulletin
https://www.readbyqxmd.com/read/28805036/classification-of-mechanisms-of-strut-malapposition-after-angiographically-optimized-stent-implantation-an-optical-coherence-tomography-study
#12
Mayank Agrawal, Abdul Hakeem, Zubair Ahmed, Barry F Uretsky
AIMS: To elucidate causes and extent of strut malapposition in angiographically optimized stenting. METHODS AND RESULTS: Using a new classification system for strut malapposition, the mechanisms of stent strut malapposition were classified as localized lumen enlargement, vessel asymmetry, stent undersizing, strut underexpansion and stent deployment issue. Stent implantations (n = 110) in 100 consecutive patients undergoing optical coherence tomography (OCT) after the operator considered the stent as optimally deployed angiographically were reviewed to determine if strut apposition was complete...
August 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28804781/form-and-function-optional-complementizers-reduce-causal-inferences
#13
Hannah Rohde, Joseph Tyler, Katy Carlson
Many factors are known to influence the inference of the discourse coherence relationship between two sentences. Here, we examine the relationship between two conjoined embedded clauses in sentences like The professor noted that the student teacher did not look confident and (that) the students were poorly behaved. In two studies, we find that the presence of that before the second embedded clause in such sentences reduces the possibility of a forward causal relationship between the clauses, i.e., the inference that the student teacher's confidence was what affected student behavior...
2017: Glossa
https://www.readbyqxmd.com/read/28804752/understanding-mixed-emotions-paradigms-and-measures
#14
Sylvia D Kreibig, James J Gross
In this review, we examine the paradigms and measures available for experimentally studying mixed emotions in the laboratory. For eliciting mixed emotions, we describe a mixed emotions film library that allows for the repeated elicitation of a specific homogeneous mixed emotional state and appropriately matched pure positive, pure negative, and neutral emotional states. For assessing mixed emotions, we consider subjective and objective measures that fall into univariate, bivariate, and multivariate measurement categories...
June 2017: Current Opinion in Behavioral Sciences
https://www.readbyqxmd.com/read/28804464/retinal-vascular-autoregulation-during-phase-iv-of-the-valsalva-maneuver-an-optical-coherence-tomography-angiography-study-in-healthy-chinese-adults
#15
Yuan Zong, Huan Xu, Jian Yu, Chunhui Jiang, Xiangmei Kong, Yi He, Xinghuai Sun
The impairment of retinal vascular autoregulation can be an early manifestation of many systemic and ocular diseases. Therefore, quantifying retinal vascular autoregulation in a non-invasive manner is very important. This study evaluated the effects of a Valsalva maneuver (VM)-induced blood pressure increases on retinal vascular autoregulation. Parafoveal and peripapillary retinal vessel density were measured with optical coherence tomography angiography before (baseline) and 5 s after each subject completed a VM (Phase IV [VM-IV])...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28804395/social-exclusion-of-older-persons-a-scoping-review-and-conceptual-framework
#16
REVIEW
Kieran Walsh, Thomas Scharf, Norah Keating
As a concept, social exclusion has considerable potential to explain and respond to disadvantage in later life. However, in the context of ageing populations, the construct remains ambiguous. A disjointed evidence-base, spread across disparate disciplines, compounds the challenge of developing a coherent understanding of exclusion in older age. This article addresses this research deficit by presenting the findings of a two-stage scoping review encompassing seven separate reviews of the international literature pertaining to old-age social exclusion...
March 2017: European Journal of Ageing
https://www.readbyqxmd.com/read/28803527/science-s-disparate-responsibilities-patterns-across-european-countries
#17
Niels Mejlgaard
It is a distinctive feature of European science policy that science is expected to meet economic and broader societal objectives simultaneously. Science should be governed democratically and take significant responsibilities towards the economy, the political system and civil society, but the coherency of these multiple claims is underexplored. Using metrics that emerge from both quantitative and qualitative studies, we examine the interrelatedness of different responsibilities at the level of countries. A total of 33 European Union member states and associated countries are included in the analysis...
August 1, 2017: Public Understanding of Science
https://www.readbyqxmd.com/read/28803346/sense-of-coherence-self-esteem-and-health-locus-of-control-in-subjects-with-type-1-diabetes-mellitus-with-without-satisfactory-metabolic-control
#18
C Nuccitelli, A Valentini, M T Caletti, C Caselli, N Mazzella, G Forlani, G Marchesini
BACKGROUND: Despite intensive training, a few individuals with Type 1 diabetes mellitus (T1DM) fail to reach the desired metabolic targets. AIM: To evaluate the association between disease-related emotional and cognitive aspects and metabolic control in subjects with T1DM. SUBJECTS AND METHODS: Health locus of control (HLOC), sense of coherence (SOC), and self-esteem were assessed in T1DM subjects using validated questionnaires. Sixty-seven consecutive subjects who did not attain the desired HbA1c target (mean HbA1c, 8...
August 12, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28803269/the-callosal-relay-model-of-interhemispheric-communication-new-evidence-from-effective-connectivity-analysis
#19
Saskia Steinmann, Jan Meier, Guido Nolte, Andreas K Engel, Gregor Leicht, Christoph Mulert
Interhemispheric auditory connectivity via the corpus callosum has been demonstrated to be important for normal speech processing. According to the callosal relay model, directed information flow from the right to the left auditory cortex has been suggested, but this has not yet been proven. For this purpose, 33 healthy participants were investigated with 64-channel EEG while performing the dichotic listening task in which two different consonant-vowel syllables were presented simultaneously to the left (LE) and right ear (RE)...
August 12, 2017: Brain Topography
https://www.readbyqxmd.com/read/28803250/optical-coherence-tomography-angiography-in-children-with-leber-coats-disease
#20
Michele Fortunato, Angela Turtoro, Gilda Cennamo
INTRODUCTION: The aim of this work was to describe the optical coherence tomography (OCT) angiography (OCTA) features in paediatric Leber-Coats disease. METHODS: Three children presenting with unilateral, clinically active Leber-Coats disease were evaluated using spectral domain OCT and OCTA. OCT angiograms were analysed and compared with the current literature. RESULTS: All 3 OCT angiograms showed that the vessels had lost most of their collateral branches and presented many loops...
August 12, 2017: Ophthalmic Research
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