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Thickness dependent tortuosity estimation for retinal blood vessels

Hind Azegrouz, Emanuele Trucco, Baljean Dhillon, Thomas MacGillivray, I.J. MacCormick
2006 IEEE Engineering in Medicine and Biology Society. Conference Proceedings  
This paper describes a framework for the automated estimation of vessel tortuosity in retinal images.  ...  We introduce a new tortuosity metric that takes into account vessel thickness, yielding estimates plausibly closer to intuition and medical judgement than those from previous metrics.  ...  However, the perceived tortuosity of blood vessels seem to depend on thickness as well: in Figure 1 , for instance, one would attribute a higher tortuosity level to the thicker vessels.  ... 
doi:10.1109/iembs.2006.4398495 fatcat:msnd7cul5fhtbnxtaeh7dstsq4

Thickness dependent tortuosity estimation for retinal blood vessels

Hind Azegrouz, Emanuele Trucco, Baljean Dhillon, Thomas MacGillivray, I.J. MacCormick
2006 2006 International Conference of the IEEE Engineering in Medicine and Biology Society  
This paper describes a framework for the automated estimation of vessel tortuosity in retinal images.  ...  We introduce a new tortuosity metric that takes into account vessel thickness, yielding estimates plausibly closer to intuition and medical judgement than those from previous metrics.  ...  However, the perceived tortuosity of blood vessels seem to depend on thickness as well: in Figure 1 , for instance, one would attribute a higher tortuosity level to the thicker vessels.  ... 
doi:10.1109/iembs.2006.260558 pmid:17945850 fatcat:6qaksnlh7jee5l7riuyofeyxau

Modeling the Tortuosity of Retinal Vessels: Does Caliber Play a Role?

E Trucco, H Azegrouz, B Dhillon
2010 IEEE Transactions on Biomedical Engineering  
To support this statement, we devise a novel measure of tortuosity, depending on both curvature and thickness, and test it with 200 vessels selected by our clinical author from the public digital retinal  ...  The tortuosity of retinal blood vessels is a diagnostic parameter assessed by ophthalmologists on the basis of examples and experience; no quantitative model is specified in clinical practice.  ...  McGillivray for support and helpful discussions.  ... 
doi:10.1109/tbme.2010.2050771 pmid:20515707 fatcat:txadbhyogvcknplmvsx3j5wo5u

AUTOMATIC RETINAL VESSEL TORTUOSITY MEASUREMENT

Abbadi
2013 Journal of Computer Science  
In this study we suggest a novel mask filter to track the blood vessel along its course and measuring the blood vessels tortuosity over the entire human retinal vessel network in fundus eye image, by using  ...  Retinal vascular vessels have the role to indicate the retinal diseases and for systematic diseases when there are any abnormalities in retinal vascular pattern.  ...  Onkaew et al. (2011) proposed automatic way to measuring the tortuosity for retinal blood vessels which mainly depend on calculating the curvature from improved chain code algorithm, this process regards  ... 
doi:10.3844/jcssp.2013.1456.1460 fatcat:rghwep4k3jfpdlgurewryr5zve

Modified Curvature-based Trigonometric Identities for Retinal Blood Vessel Tortuosity Measurement in Diabetic Retinopathy Fundus Images

N. Badariah A. Mustafa, W. Mimi Diyana W. Zaki, Aini Hussain, Jemaima Che Hamzah
2018 International Journal of Engineering & Technology  
The retinal blood vessel curvature is measured based on clinical experiences. It is very subjective and inconsistent to describe the presence of tortuosity in fundus images.  ...  Thus, this paper aims to measure the tortuosity of retinal blood vessel using curvature-based method and investigate its relationship with diabetic retinopathy (DR) disease.  ...  Fig. 2 : 2 Flow chart of the proposed method for retinal blood vessel tortuosity measurement Fig. 3 : 3 Flow chart of implementation of retinal blood vessel segmentation algorithm on fundus image (a)  ... 
doi:10.14419/ijet.v7i4.11.20788 fatcat:scikxjcyorhurau5azx3ux5uc4

Vessel Evaluation in Patients with Primary Open-Angle Glaucoma, Normal Tension Glaucoma and Healthy Controls

Constanze Kortuem, Johannes Dietter, Yagmur Bozkurt, Friederike Charlotte Kortuem, Annegret Abaza, Siegfried Wahl, Iliya V Ivanov, Marius Ueffing, Bogomil Voykov
2021 Clinical Ophthalmology  
The assessment of tortuosity using our novel method was consistent with previously established methods for analyzing tortuosity.  ...  To compare changes in central retinal arterial equivalent (CRAE), central retinal vein equivalent (CRVE), arteriovenous ratio (AVR), tortuosity and fractal dimension in primary open-angle glaucoma (POAG  ...  Part of the work concerning the development of algorithms for fundus analysis was supported by a grant of the Charlotte and Tistou Kerstan Foundation.  ... 
doi:10.2147/opth.s320505 pmid:34707346 pmcid:PMC8544789 fatcat:b2foytykg5bwphpcssqqelag7i

An Automated Image Segmentation and Useful Feature Extraction Algorithm for Retinal Blood Vessels in Fundus Images

Aws A. Abdulsahib, Moamin A. Mahmoud, Hazleen Aris, Saraswathy Shamini Gunasekaran, Mazin Abed Mohammed
2022 Electronics  
Therefore, an automatic algorithm for segmenting and extracting useful clinical features from the retinal blood vessels is critical to help ophthalmologists and eye specialists to diagnose different retinal  ...  The manual segmentation of the blood vessels in retinal images has numerous limitations.  ...  Vessel Thickness The blood vessel thickness is the average width of the retinal blood vessels. In this paper, a new procedure for computing the retinal blood vessels thickness is developed.  ... 
doi:10.3390/electronics11091295 fatcat:62w4lqsg5rfmjigdgukc6brygy

Relationship of Retinal Vascular Tortuosity with the Neuroretinal Rim: The Singapore Malay Eye Study

Victor Koh, Carol Yim-lui Cheung, Yingfeng Zheng, Tien Yin Wong, Wanling Wong, Tin Aung
2010 Investigative Ophthalmology and Visual Science  
Straighter retinal vessels were significantly associated with a thinning neuroretinal rim.  ...  In analyses adjusting for age, sex, spherical equivalent, and retinal vascular caliber, reduced arteriolar and venular tortuosity were associated with a decrease in global RDA ratio (P ϭ 0.006 and P ϭ  ...  The mean differences in RDA ratios were estimated for each standard deviation change in retinal arteriolar tortuosity (SD, 0.0091) and retinal venular tortuosity (SD, 0.0094).  ... 
doi:10.1167/iovs.09-5008 pmid:20207964 fatcat:g2qfz67bffhublnrp2ilt4xa6e

Automatic Grading of Images based on Retinal Vessel Tortuosity Analysis

K. Narasimhan, K. Vijayarekha
2015 Indian Journal of Science and Technology  
After preprocessing and blood vessel extraction, eight dimensional feature vector is formed by evaluating tortuosity.  ...  Blood vessel tortuosity analysis in fundus image is used to develop a Clinical Decision Support System (CDSS) to diagnose hypertensive retinopathy, retinopathy of prematurity, cardiovascular problem and  ...  Using Machine learning technique, thickness dependent tortuosity and curvature based improved chain code is explored for tortuosity measurement in 16, 17, 19 .  ... 
doi:10.17485/ijst/2015/v8i1/73412 fatcat:yhvpbknvurbsxaoryqxbvgscx4

Association between the retinal vascular network and retinal nerve fiber layer in the elderly: The Montrachet study

Louis Arnould, Martin Guillemin, Alassane Seydou, Pierre-Henry Gabrielle, Abderrahmane Bourredjem, Ryo Kawasaki, Christine Binquet, Alain M. Bron, Catherine Creuzot-Garcher, Ireneusz Grulkowski
2020 PLoS ONE  
Our study found that decreased retinal vessels caliber were associated with a decreased RNFL thickness in the elderly without optic neuropathy.  ...  To investigate the association between the characteristics of the retinal vascular network in the elderly and retinal nerve fiber layer (RNFL) thickness in a population-based study.  ...  Acknowledgments The authors thank Sandrine Daniel for her valuable skills in data management for the Montrachet study.  ... 
doi:10.1371/journal.pone.0241055 pmid:33085730 fatcat:pkovdvwetre2rdm5crdl62p4me

Relationship Between Retinal Vascular Geometry With Retinal Nerve Fiber Layer and Ganglion Cell-Inner Plexiform Layer in Nonglaucomatous Eyes

Yih-Chung Tham, Ching-Yu Cheng, Yingfeng Zheng, Tin Aung, Tien Yin Wong, Carol Y. Cheung
2013 Investigative Ophthalmology and Visual Science  
Vascular tortuosity is largely dependent on the properties of the endothelium, which lines the inner vessel wall.  ...  The estimates were summarized as retinal arteriolar and venular tortuosity, representing the average tortuosity of arterioles and venules respectively.  ... 
doi:10.1167/iovs.13-12796 pmid:24135760 fatcat:soxzri2xmrg5tpugl2uih5vuuq

Retinal vasculature in glaucoma: a review

Karen K W Chan, Fangyao Tang, Clement C Y Tham, Alvin L Young, Carol Y Cheung
2017 BMJ Open Ophthalmology  
from retinal photographs using computer software (eg, calibre, fractal dimension, tortuosity and branching angle) are currently being explored for any association with glaucoma and its progression.  ...  nerve fibre layer thickness.  ...  Retinal vascular tortuosity Retinal vascular tortuosity reflects vessel curvature and is summarised as the ratio between the actual distance a vessel travels from points A to B and the shortest straight-line  ... 
doi:10.1136/bmjophth-2016-000032 pmid:29354699 pmcid:PMC5721639 fatcat:65vgbzi6zba4ffuyquolb6rrmu

Age-related changes of the retinal microvasculature

Nikita V. Orlov, Cristopher Coletta, Freekje van Asten, Yong Qian, Jun Ding, Majd AlGhatrif, Edward Lakatta, Emily Chew, Wai Wong, Anand Swaroop, Edoardo Fiorillo, Alessandro Delitala (+4 others)
2019 PLoS ONE  
We investigated how retinal vessel structure captured in fundus photographs changes with age, and how this may reflect features related to patient health, including blood pressure.  ...  Blood vessels of the retina provide an easily-accessible, representative window into the condition of microvasculature.  ...  Luigi Ferrucci for encouragement and provision of the retinal camera. Author Contributions Conceptualization: Ilya G. Goldberg, David Schlessinger.  ... 
doi:10.1371/journal.pone.0215916 pmid:31048908 pmcid:PMC6497255 fatcat:dl5asgpndrhangnuqpp2piqw6e

Morphological Analysis of Retinal Microvasculature to Improve Understanding of Retinal Hemorrhage Mechanics in Infants

Matt P. Byrne, Kendall R. McMillan, Brittany Coats
2020 Investigative Ophthalmology and Visual Science  
Vessel segment length, diameter, angular asymmetry, tortuosity, and branch points were quantified using a custom image segmentation code.  ...  Tortuosity significantly increased with depth, regardless of age (P < 0.05). These data suggest a potential vulnerability of vasculature in the deeper retinal layers, particularly in immature eyes.  ...  Acknowledgments The authors thank Tara Mleynek for assistance in developing the staining protocol and Chris Rodesch at the University of Utah Core Cell Imaging Facility for his assistance with imaging.  ... 
doi:10.1167/iovs.61.3.16 pmid:32176264 pmcid:PMC7401705 fatcat:gh5r4k7u3zd2xphp53lraosetq

Method for quantitative assessment of retinal vessel tortuosity in optical coherence tomography angiography applied to sickle cell retinopathy

Maziyar M. Khansari, William O'Neill, Jennifer Lim, Mahnaz Shahidi
2017 Biomedical Optics Express  
The results demonstrate that the proposed method shows promise for detection of increased tortuosity in vessels due to retinal disorders.  ...  An imageprocessing pipeline was developed for application of VTI in retinal vessels imaged by optical coherence tomography angiography (OCTA) in perifoveal (6 mm × 6 mm) and parafoveal (3 mm × 3 mm) regions  ...  However, these methods are limited since they cannot always accurately estimate vessel tortuosity [13, 16, 17, 21-24, 26, 28-30] , or are scale-dependent [25, 27] .  ... 
doi:10.1364/boe.8.003796 pmid:28856050 pmcid:PMC5560841 fatcat:3sufsziudvhodjpif7cn7lza5y
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