Detection of retinal lesions in diabetic retinopathy: comparative evaluation of 7-field digital color photography versus red-free photography

  title={Detection of retinal lesions in diabetic retinopathy: comparative evaluation of 7-field digital color photography versus red-free photography},
  author={Pradeep Venkatesh and Reetika Sharma and Nagender Vashist and Rajpal Vohra and Satpal P Garg},
  journal={International Ophthalmology},
Red-free light allows better detection of vascular lesions as this wavelength is absorbed by hemoglobin; however, the current gold standard for the detection and grading of diabetic retinopathy remains 7-field color fundus photography. The goal of this study was to compare the ability of 7-field fundus photography using red-free light to detect retinopathy lesions with corresponding images captured using standard 7-field color photography. Non-stereoscopic standard 7-field 30° digital color… 
Imaging diabetic retinal disease: clinical imaging requirements.
This review discusses the relevance of the currently available imaging modalities for the evaluation of diabetic retinopathy: colour fundus photography (CFP), ultrawide-field photography (UWFP), fundus fluorescein angiography (FFA), optical coherence tomography (OCT), OCT angiographies (O CTA) and functional testing and suggests where a particular imaging technique of DR may aid the evaluation in different clinical settings.
Automated Diabetic Retinopathy Screening and Monitoring Using Retinal Fundus Image Analysis
An automated DR screening tool and extended it for automated estimation of microaneurysm (MA) turnover, a potential biomarker for DR risk, have the potential to address the growing need for DR screening and monitoring, thereby saving vision of millions of diabetic patients worldwide.
Detail-richest-channel based enhancement for retinal image and beyond
Multimodal retinal imaging in the diagnosis of intraretinal microvascular abnormality
An overview of the available imaging modalities, their current applications and limitations as well as future developments in the pipeline is presented, and the implication of new imaging technology on the traditional definition of IRMAs and how this may translate into potential treatment outcomes for the patient is discussed.
Attenuation of the high-frequency flicker electroretinogram, which is primarily generated by bipolar cells, suggests a relatively early retinal site of neural dysfunction in diabetic patients who have mild or no DR.
Detection of the Emergence of Exudate on the Image of Retina Using Extreme Learning Machine Method
To build an exudate emergence detection system, the method of extreme learning machine (ELM) is used which has a fast learning speed and the best model results reached the best accuracy value of 65% with a combination of multiquadric activation functions and 30 hidden neurons.
Interactive Blood Vessel Segmentation from Retinal Fundus Image Based on Canny Edge Detector
An interactive blood vessel segmentation from retinal fundus image based on Canny edge detection is proposed, which is useful because different edge detection parameter settings can be applied to the same image to highlight particular vessels for analysis or presentation.
A New Early Stage Diabetic Retinopathy Diagnosis Model Using Deep Convolutional Neural Networks and Principal Component Analysis
A new strategy that brings the strength of convolutional neural networks (CNNs) to the diagnosis of diabetic retinopathy and achieves a diagnosis accuracy of 98.44% and was extremely robust and promising in comparison to other diagnosis methods.


Non‐stereo fundus photography as a screening procedure for diabetic retinopathy among patients with type II diabetes
The photographic method is recommended as an easy and reliable screening device for diabetic retinopathy among patients with type II diabetes.
Detection of diabetic retinopathy: a comparison between red-free digital images and colour transparencies
Red-free digital images are comparable with two-field colour transparencies in the identification of mild to moderate nonproliferative diabetic retinopathy.
Sensitivity and specificity of photography and direct ophthalmoscopy in screening for sight threatening eye disease: the Liverpool diabetic eye study
A photographic method should be considered as preferred option in national, community based screening programmes for sight threatening diabetic eye disease because direct ophthalmoscopy is limited by weaknesses inherent to the instrument.
A comparative evaluation of digital imaging, retinal photography and optometrist examination in screening for diabetic retinopathy
Aims To compare the respective performances of digital retinal imaging, fundus photography and slit‐lamp biomicroscopy performed by trained optometrists, in screening for diabetic retinopathy. To
Identification of individual microaneurysms: A comparison between fluorescein angiograms and red-free and colour photographs
Although MAs in FAG and red spots in colour or red-free photographs all reflect the degree of retinopathy, about half of the red dots in photographs do not represent open MAsin FAGs.
Monochromatic ophthalmoscopy and fundus photography. The normal fundus.
The optimal spectral ranges for visualization of the different fundus structures are reported and the appearance of individual structures and areas of the fundus under different spectral illuminations are described and illustrated.
The Wisconsin Epidemiologic Study of Diabetic Retinopathy. IX. Four-year incidence and progression of diabetic retinopathy when age at diagnosis is less than 30 years.
The incidence of proliferative retinopathy rose with increasing duration until 13 to 14 years of diabetes, thereafter remaining between 14% and 17%.
The Wisconsin Epidemiologic Study of Diabetic Retinopathy. X. Four-year incidence and progression of diabetic retinopathy when age at diagnosis is 30 years or more.
The four-year incidence and progression of retinopathy were investigated in a population-based sample of people with diabetes diagnosed at 30 years of age or older. For insulin users, 73 (47%) of the
The Wisconsin epidemiologic study of diabetic retinopathy. II. Prevalence and risk of diabetic retinopathy when age at diagnosis is less than 30 years.
In a population-based study in southern Wisconsin, 996 insulin-taking, younger-onset diabetic persons were examined using standard protocols to determine the prevalence and severity of diabetic