Results 41 to 50 of about 83,492 (257)

Fast retinal vessel analysis [PDF]

Journal of Real-Time Image Processing, 2013
We introduce a fast image processing system that allows to analyse digital data-bases of retinal images in a short time, and to process the image in situ while the patient is examined. While it achieves a comparable quality as state-of-the-art methods, it differs from most of them by the fact that it is extremely fast.
Michael Krause 0007, Ralph Maria Alles, Bernhard Burgeth, Joachim Weickert   +3 more
openaire   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Late clinical characteristics of infants with retinopathy of prematurity and treated with cryotherapy [PDF]

International Journal of Ophthalmology, 2016
AIM: To describe the clinical characteristics and late results of patients with retinopathy of prematurity (ROP) treated with “6h cryotherapy”. METHODS: Out of 1252 infants screened for ROP, 52 patients were treated with temporal 6h cryotherapy from ...
Eren Cerman, Deniz Ozarslan Ozcan, Hande Celiker, Muhsin Eraslan, Ozlem Sahin, Haluk Kazokoglu   +5 more
doaj   +1 more source

Analysis of retinal vessels in eyes with retinitis pigmentosa by retinal oximeter [PDF]

Acta Ophthalmologica, 2014
AbstractPurposeTo study changes in the oxygen saturation and calibre of retinal vessels in the eyes of patients with retinitis pigmentosa (RP).MethodIn this cross‐sectional study, 63 eyes of 63 patients with RP and 14 eyes of 14 healthy subjects were enrolled and examined at Toyama University Hospital. Retinal oximetry measurements were performed using
Tomoko, Ueda-Consolvo, Chiharu, Fuchizawa, Mitsuya, Otsuka, Takuya, Nakagawa, Atsushi, Hayashi   +4 more
openaire   +2 more sources

A Whole‐Head Finite Element Model for Electrical Neuromodulation via Visual Brain‐Machine Interfaces

Advanced Science, EarlyView.
A multimodal, personalized head model is presented that integrates the entire visual pathway with surrounding tissues to simulate electrical stimulation of the optic nerve. In vivo validation in humans and goats, plus systematic component‐elimination analysis, demonstrates the high accuracy of the comprehensive model.
Shengjian Lu, Tonghe Yang, Yuan Geng, Huan Wu, Yangrui Huang, Te Zheng, Haodi Chen, Shurui Huang, Yi Cao, Jian Yang, Wentao Yan, Yikui Zhang, Wencan Wu   +12 more
wiley   +1 more source

Impact of Retinal Vessel Image Coherence on Retinal Blood Vessel Segmentation

Electronics, 2023
Retinal vessel segmentation is critical in detecting retinal blood vessels for a variety of eye disorders, and a consistent computerized method is required for automatic eye disorder screening. Many methods of retinal blood vessel segmentation are implemented, but these methods only yielded accuracy and lack of good sensitivity due to the coherence of ...
Alqahtani Saeed S, Toufique A. Soomro, Nisar Ahmed Jandan, Ahmed Ali, Muhammad Irfan, Saifur Rahman, Waleed A. Aldhabaan, Abdulrahman Samir Khairallah, Ismail Abuallut   +8 more
openaire   +1 more source

A Pentaradial and Bilateral Combined Photoreception System in the Sea Cucumber is Mediated by a Blue Light‐Sensitive R‐Opsin

Advanced Science, EarlyView.
The sea cucumber Holothuria leucospilota detects blue and adjacent wavelengths of light via an r‐opsin with a maximum absorption at 459 nm. In the oral tentacles, papillae, and tube feet, distinct light‐sensing structures with specialized morphologies are formed, constituting a unique pentaradial and bilateral combined photoreception system.
Jiasheng Huang, Chunhua Ren, Zhou Qin, Yimeng Cui, Bingbing Zhang, Peng Luo, Xuan Wang, Yaoqi Xie, Xin Zhang, Aifen Yan, Yang Zhang, Dingding Fan, Yang Liu, Wenjie Pan, Xiao Jiang, Lihong Yuan, Haipeng Qin, David M. Irwin, Chaoqun Hu, Yang Liu, Ting Chen   +20 more
wiley   +1 more source

Retinal Blood Vessels Segmentation using Local Ternary Pattern

Pakistan Journal of Engineering & Technology, 2021
Retinal vessels segmentation is an important task in medical image analysis. This paper presents a robust vessel segmentation algorithm. The proposed method initially, isolates the Green channel from the input image.
Bibi Misbah Kazmi, Fahd Sultan, Khurram Khan, Zahid Mahmood   +3 more
doaj   +1 more source

CD4+ Tregs Drive Post‐Ischemic Sprouting Angiogenesis via Endothelial YY1/MAML1 Reactivation

Advanced Science, EarlyView.
ABSTRACT Microvascular complications of diabetes are chronic diseases of small vessels. We previously found that CD4+ regulatory T‐cells (Tregs) are markedly reduced in type 2 diabetes (T2D) after ischemic injury in both mice and humans, and that Treg deficiency in immunodeficient mice impairs vascular regeneration.
Hang Qu, Cheng Kiu Ho, Jitao Liu, Lei Cui, Yangfeng Hou, Cai Liang, Wenchu Ye, Randolph H. L. Wong, Shohei Hori, Bin Zhou, Kathy O. Lui   +10 more
wiley   +1 more source

Comprehensive multiomics analyses identify guanylate cyclase activator 1A as a photoreceptor-specific target in a murine model of oxygen-induced retinopathy

Journal of Translational Medicine
Background Retinopathy of prematurity (ROP), the leading cause of childhood blindness, is considered a vascular retinopathy; however, clinical studies have reported persistent electrophysiological dysfunctions in some ROP patients with remitted ...
Qianhui Yang, Jindan Wang, Tongrui Wu, Siyi Liu, Yumin Zhang, Xinglong Wang, Weiran Zhang, Hua Rong, Mengyu Wu, Yating Zhao, Yunshan Cao, Min Zhang, Hui Shen, Yan Zhang   +13 more
doaj   +1 more source