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https://www.readbyqxmd.com/read/29688698/direct-laser-writing-of-nanophotonic-structures-on-contact-lenses
#1
Bader AlQattan, Ali K Yetisen, Haider Butt
Contact lenses are ubiquitous biomedical devices used for vision correction and cosmetic purposes. Their application as quantitative analytical devices is highly promising for point-of-care diagnostics. However, it is a challenge to integrate nanoscale features into commercial contact lenses for application in low-cost biosensors. A neodymium-doped yttrium aluminum garnet (Nd:YAG) laser (1064 nm, 3 ns pulse, 240 mJ) in holographic interference patterning mode was utilized to produce optical nanostructures over the surface of a hydrogel contact lens...
April 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29685530/the-future-of-radiology-augmented-with-artificial-intelligence-a-strategy-for-success
#2
REVIEW
Charlene Liew
The rapid development of Artificial Intelligence/deep learning technology and its implementation into routine clinical imaging will cause a major transformation to the practice of radiology. Strategic positioning will ensure the successful transition of radiologists into their new roles as augmented clinicians. This paper describes an overall vision on how to achieve a smooth transition through the practice of augmented radiology where radiologists-in-the-loop ensure the safe implementation of Artificial Intelligence systems...
May 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29679170/light-localization-with-low-contrast-targets-in-a-patient-implanted-with-a-suprachoroidal-transretinal-stimulation-retinal-prosthesis
#3
Takao Endo, Takashi Fujikado, Masakazu Hirota, Hiroyuki Kanda, Takeshi Morimoto, Kohji Nishida
PURPOSE: To evaluate the improvement in targeted reaching movements toward targets of various contrasts in a patient implanted with a suprachoroidal-transretinal stimulation (STS) retinal prosthesis. METHODS: An STS retinal prosthesis was implanted in the right eye of a 42-year-old man with advanced Stargardt disease (visual acuity: right eye, light perception; left eye, hand motion). In localization tests during the 1-year follow-up period, the patient attempted to touch the center of a white square target (visual angle, 10°; contrast, 96, 85, or 74%) displayed at a random position on a monitor...
April 20, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29673324/gabriel-richet-when-medicine-combines-with-courage
#4
EDITORIAL
Pierre Ronco
Gabriel Richet, one of the fathers of the French and international Nephrology, was a man remarkable for his courage, vision and empathy. He was proud and brave, and he presented himself proud of being brave. He opens his interview speaking about his youth, when he was injured, and went back to the fight. He cites the number of stitches he received, but doesn't cite being decorated with the Légion d'Honneur, one of the highest honours of the French Republic. This anecdote perfectly illustrates his elegance and detachment from awards and self-satisfaction...
April 19, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29669366/the-use-of-optical-coherence-tomography-for-the-detection-of-early-diabetic-retinopathy
#5
Gabor Mark Somfai, Heinrich Gerding, Delia Cabrera DeBuc
Diabetic retinopathy (DR) is one of the leading causes of vision loss globally with a severe burden on all societies due to its high treatment and rehabilitation costs. The early diagnosis of DR may provide preventive steps (including retinal laser therapy and tight carbohydrate, blood pressure, and cholesterol control) that could in turn help to avoid progression of the pathology with the resultant vision loss. Optical coherence tomography (OCT) enables the in vivo structural imaging of the retina, providing both qualitative (structure) and quantitative (thickness) information...
April 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29624184/self-powered-vision-electronic-skin-basing-on-piezo-photodetecting-ppy-pvdf-pixel-patterned-matrix-for-mimicking-vision
#6
Wuxiao Han, Linlin Zhang, Haoxuan He, Hongmin Liu, Lili Xing, Xinyu Xue
The development of multifunctional electronic-skin that establishes human-machine interfaces, enhances perception abilities or has other distinct biomedical applications is the key to the realization of artificial intelligence. In this paper, a new self-powered (battery-free) flexible vision electronic-skin has been realized from pixel-patterned matrix of piezo-photodetecting PVDF/Ppy film. The electronic-skin under applied deformation can actively output piezoelectric voltage, and the outputting signal can be significantly influenced by UV illumination...
June 22, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29617592/bedside-computer-vision-moving-artificial-intelligence-from-driver-assistance-to-patient-safety
#7
Serena Yeung, N Lance Downing, Li Fei-Fei, Arnold Milstein
The Institute of Medicine’s 1999 report on preventable patient harm in hospitals provoked requirements for public reporting of errors and financial penalties for preventable hospital-acquired conditions. Checklists, protocols, root-cause analyses, programs for creating a culture of safety, and..
April 5, 2018: New England Journal of Medicine
https://www.readbyqxmd.com/read/29616982/a-fast-intracortical-brain-machine-interface-with-patterned-optogenetic-feedback
#8
Aamir Abbasi, Dorian Goueytes, Daniel E Shulz, Valerie Ego-Stengel, Luc Estebanez
OBJECTIVE: The development of brain-machine interfaces (BMIs) brings a new perspective to patients with a loss of autonomy. By combining online recordings of brain activity with a decoding algorithm, patients can learn to control a robotic arm in order to perform simple actions. However, in contrast to the vast amounts of somatosensory information channeled by limbs to the brain, current BMIs are devoid of touch and force sensors. Patients must therefore rely solely on vision and audition, which are maladapted to the control of a prosthesis...
April 4, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29616262/how-do-plants-see-the-world-uv-imaging-with-a-tio-2-nanowire-array-by-artificial-photosynthesis
#9
Ji-Hoon Kang, Thibault Leportier, Min-Chul Park, Sung Gyu Han, Jin-Dong Song, Hyunsu Ju, Yun Jeong Hwang, Byeong-Kwon Ju, Ting-Chung Poon
The concept of plant vision refers to the fact that plants are receptive to their visual environment, although the mechanism involved is quite distinct from the human visual system. The mechanism in plants is not well understood and has yet to be fully investigated. In this work, we have exploited the properties of TiO2 nanowires as a UV sensor to simulate the phenomenon of photosynthesis in order to come one step closer to understanding how plants see the world. To the best of our knowledge, this study is the first approach to emulate and depict plant vision...
April 4, 2018: Nanoscale
https://www.readbyqxmd.com/read/29603671/penguin-colony-attendance-under-artificial-lights-for-ecotourism
#10
Airam Rodríguez, Ross Holmberg, Peter Dann, André Chiaradia
Wildlife watching is an emerging ecotourism activity around the world. In Australia and New Zealand, night viewing of little penguins attracts hundreds of thousands of visitors per year. As penguins start coming ashore after sunset, artificial lighting is essential to allow visitors to view them in the dark. This alteration of the nightscape warrants investigation for any potential effects of artificial lighting on penguin behavior. We experimentally tested how penguins respond to different light wavelengths (colors) and intensities to examine effects on the colony attendance behavior at two sites on Phillip Island, Australia...
March 30, 2018: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29603223/assessment-of-beer-quality-based-on-a-robotic-pourer-computer-vision-and-machine-learning-algorithms-using-commercial-beers
#11
Claudia Gonzalez Viejo, Sigfredo Fuentes, Damir D Torrico, Kate Howell, Frank R Dunshea
Sensory attributes of beer are directly linked to perceived foam-related parameters and beer color. The aim of this study was to develop an objective predictive model using machine learning modeling to assess the intensity levels of sensory descriptors in beer using the physical measurements of color and foam-related parameters. A robotic pourer (RoboBEER), was used to obtain 15 color and foam-related parameters from 22 different commercial beer samples. A sensory session using quantitative descriptive analysis (QDA® ) with trained panelists was conducted to assess the intensity of 10 beer descriptors...
March 30, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29599655/dark-matters-challenges-of-nocturnal-communication-between-plants-and-animals-in-delivery-of-pollination-services
#12
REVIEW
Renee M Borges
The night is a special niche characterized by dim light, lower temperatures, and higher humidity compared to the day. Several animals have made the transition from the day into the night and have acquired unique adaptations to cope with the challenges of performing nocturnal activities. Several plant species have opted to bloom at night, possibly as a response to aridity to prevent excessive water loss through evapotranspiration since flowering is often a water-demanding process, or to protect pollen from heat stress...
March 2018: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/29587378/green-grape-detection-and-picking-point-calculation-in-a-night-time-natural-environment-using-a-charge-coupled-device-ccd-vision-sensor-with-artificial-illumination
#13
Juntao Xiong, Zhen Liu, Rui Lin, Rongbin Bu, Zhiliang He, Zhengang Yang, Cuixiao Liang
Night-time fruit-picking technology is important to picking robots. This paper proposes a method of night-time detection and picking-point positioning for green grape-picking robots to solve the difficult problem of green grape detection and picking in night-time conditions with artificial lighting systems. Taking a representative green grape named Centennial Seedless as the research object, daytime and night-time grape images were captured by a custom-designed visual system. Detection was conducted employing the following steps: (1) The RGB (red, green and blue)...
March 25, 2018: Sensors
https://www.readbyqxmd.com/read/29573863/-comparison-of-objective-optical-quality-measured-by-double-pass-aberrometry-in-patients-with-moderate-dry-eye-normal-saline-vs-artificial-tears-a-pilot-study
#14
G Vandermeer, Y Chamy, P-J Pisella
Dry eye is defined by a tear film instability resulting in variable but systematic fluctuations in the quality of vision. Variability in optical quality can be demonstrated using a double pass aberrometer such as the OQAS (Optical Quality Analyzing System, Visiometrics). The goal of this work is to compare fluctuations in objective quality of vision measured by OQAS between treatment with normal saline eye drops and treatment with carmellose 0.5% and hyaluronic acid 0.1% (Optive Fusion [OF], Allergan) in patients with moderate dry eye syndrome...
March 21, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29549733/combining-deep-residual-neural-network-features-with-supervised-machine-learning-algorithms-to-classify-diverse-food-image-datasets
#15
Patrick McAllister, Huiru Zheng, Raymond Bond, Anne Moorhead
Obesity is increasing worldwide and can cause many chronic conditions such as type-2 diabetes, heart disease, sleep apnea, and some cancers. Monitoring dietary intake through food logging is a key method to maintain a healthy lifestyle to prevent and manage obesity. Computer vision methods have been applied to food logging to automate image classification for monitoring dietary intake. In this work we applied pretrained ResNet-152 and GoogleNet convolutional neural networks (CNNs), initially trained using ImageNet Large Scale Visual Recognition Challenge (ILSVRC) dataset with MatConvNet package, to extract features from food image datasets; Food 5K, Food-11, RawFooT-DB, and Food-101...
February 17, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29533814/prediction-of-pork-loin-quality-using-online-computer-vision-system-and-artificial-intelligence-model
#16
Xin Sun, Jennifer Young, Jeng-Hung Liu, David Newman
The objective of this project was to develop a computer vision system (CVS) for objective measurement of pork loin under industry speed requirement. Color images of pork loin samples were acquired using a CVS. Subjective color and marbling scores were determined according to the National Pork Board standards by a trained evaluator. Instrument color measurement and crude fat percentage were used as control measurements. Image features (18 color features; 1 marbling feature; 88 texture features) were extracted from whole pork loin color images...
March 7, 2018: Meat Science
https://www.readbyqxmd.com/read/29521022/microfluidic-contact-lenses
#17
Nan Jiang, Yunuen Montelongo, Haider Butt, Ali K Yetisen
Contact lens is a ubiquitous technology used for vision correction and cosmetics. Sensing in contact lenses has emerged as a potential platform for minimally invasive point-of-care diagnostics. Here, a microlithography method is developed to fabricate microconcavities and microchannels in a hydrogel-based contact lens via a combination of laser patterning and embedded templating. Optical microlithography parameters influencing the formation of microconcavities including ablation power (4.3 W) and beam speed (50 mm s-1 ) are optimized to control the microconcavity depth (100 µm) and diameter (1...
March 9, 2018: Small
https://www.readbyqxmd.com/read/29515386/low-latency-line-tracking-using-event-based-dynamic-vision-sensors
#18
Lukas Everding, Jörg Conradt
In order to safely navigate and orient in their local surroundings autonomous systems need to rapidly extract and persistently track visual features from the environment. While there are many algorithms tackling those tasks for traditional frame-based cameras, these have to deal with the fact that conventional cameras sample their environment with a fixed frequency. Most prominently, the same features have to be found in consecutive frames and corresponding features then need to be matched using elaborate techniques as any information between the two frames is lost...
2018: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29511183/nanowire-arrays-restore-vision-in-blind-mice
#19
Jing Tang, Nan Qin, Yan Chong, Yupu Diao, Yiliguma, Zhexuan Wang, Tian Xue, Min Jiang, Jiayi Zhang, Gengfeng Zheng
The restoration of light response with complex spatiotemporal features in retinal degenerative diseases towards retinal prosthesis has proven to be a considerable challenge over the past decades. Herein, inspired by the structure and function of photoreceptors in retinas, we develop artificial photoreceptors based on gold nanoparticle-decorated titania nanowire arrays, for restoration of visual responses in the blind mice with degenerated photoreceptors. Green, blue and near UV light responses in the retinal ganglion cells (RGCs) are restored with a spatial resolution better than 100 µm...
March 6, 2018: Nature Communications
https://www.readbyqxmd.com/read/29503963/amiodarone-a-potential-risk-factor-for-retinal-phototoxicity
#20
Komal M Joshi, Manjot K Gill
Purpose: To report the only known case, to our knowledge, of amiodarone induced retinal phototoxicity following vitrectomy surgery. Observations: A 66-year-old male presented with visual acuity of 20/150 OS secondary to an epiretinal membrane (ERM). Patient was on oral amiodarone for atrial fibrillation. Baseline spectral domain optical coherence tomography (SD-OCT) revealed an ERM with retinal thickening and schisis. The patient underwent an uncomplicated pars plana vitrectomy and membrane peel using standard vitrectomy settings and illumination...
April 2017: American Journal of Ophthalmology Case Reports
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