Grading Diabetic Retinopathy Severity From Compressed Digital Retinal Images Compared With Uncompressed Images and Film

The aim of the English NHS Diabetic Eye Screening Programme is to reduce the risk of sight loss amongst people with diabetes by the prompt identification and effective treatment if necessary of sight-threatening diabetic retinopathy, at the appropriate stage during the disease process. In order to achieve the delivery of evidence-based, population-based screening programmes, it was recognised that certain key components were required. It is necessary to identify the eligible population in order to deliver the programme to the maximum number of people with diabetes. The programme is delivered and supported by suitably trained, competent, and qualified, clinical and non-clinical staff who participate in recognised ongoing Continuous Professional Development and Quality Assurance schemes. There is an appropriate referral route for those with screen-positive disease for ophthalmology treatment and for assessment of the retinal status in those with poor-quality images. Appropriate assessment of control of their diabetes is also important in those who are screen positive. Audit and internal and external quality assurance schemes are embedded in the service. In England, two-field mydriatic digital photographic screening is offered annually to all people with diabetes aged 12 years and over. The programme commenced in 2003 and reached population coverage across the whole of England by 2008. Increasing uptake has been achieved and the current annual uptake of the programme in 2015–16 is 82.8% when 2.59 million people with diabetes were offered screening and 2.14 million were screened. The benefit of the programme is that, in England, diabetic retinopathy/maculopathy is no longer the leading cause of certifiable blindness in the working age group.

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“…This level of compression has not been shown to lose any clinically significant information [13–15]. …”

Section: Stages In the Development Of The English Nhs Diabetic Eye Scmentioning

confidence: 99%

The English National Screening Programme for diabetic retinopathy 2003–2016

2017

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“…7 One study found no differences between uncompressed and compressed images of diabetic retinopathy when JPEG2000 compression was used at a ratio of 37 to 1. 8 Another study also found no differences in diagnostic accuracy with a compression factor of 30 but determined the reproducibility of diagnostic judgment was greater with images uncompressed. 9 Fourteen percent of diagnoses were adversely affected by picture quality in a videoconferencing study, 10 whereas other studies indicate video quality may be inadequate for some exams 11 and inferior to still images.…”

Section: Compressed Videomentioning

confidence: 98%

Uncompressed High-Definition Videoconferencing Tools for Telemedicine and Distance Learning

Zhang

Liu

Locatis

et al. 2013

Telemedicine and e-Health

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Uncompressed high-definition (HD) video image quality is superior to compressed HD video provided in most commercially available videoconferencing products. Uncompressed HD videoconferencing tools provide a more immersive experience because there is no reduction of image information and, in most cases, lower latency. Four open source uncompressed video applications are reviewed that have been tested at the National Library of Medicine: three transmitting uncompressed HD video and one transmitting loosely compressed standard-definition video. The technical requirements for implementing each are described, and test results in terms of image quality, latency, and application reliability are presented. Because the hardware and bandwidth requirements for uncompressed HD video are relatively high and most applications are still under development, they are generally not ready for mass deployment. Some are, however, ready for pilot testing and experimentation in clinical settings by either those who have or anticipate having bandwidth sufficient to support them or those interested in researching the effects higher-quality video may have on diagnostic and other clinical outcomes.

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“…Li et al [8] performed a study in which variants of digital implementation were compared with film-based ETDRS color 7SF photography as the reference standard. Variations included digital color 7SF photography in three formats (with no file compression, with file compression [35], and with stereo effect removed [36]) and digital wide-angle nine-field photography integrated into a mosaic. They found that the variability between gradings of digital variants and the film reference, taking the median of three independent gradings, was no greater than the variability between the individual graders within each of the media.…”

Section: Continuity and Standardization Of Image Data In Research Andmentioning

confidence: 99%

Imaging of Diabetic Retinopathy and Diabetic Macular Edema

Danis

Hubbard

2011

Curr Diab Rep

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Imaging of the retinal complications of diabetes mellitus is rapidly changing from the emergence of new technology such as optical coherence tomography. In particular, the characterization of diabetic macular edema is much easier for the clinician and there are new, more sensitive clinical research end points. However, our understanding of structure-functional relationships remains suboptimal and the classification of macular edema by optical coherence tomography continues to evolve. The classification of diabetic retinopathy severity continues to rely upon fundus photography, although the transition from film to digital photography presents both challenges and advantages.

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Grading Diabetic Retinopathy Severity From Compressed Digital Retinal Images Compared With Uncompressed Images and Film

Abstract: Full Early Treatment Diabetic Retinopathy Study scale DR severity level grading using C images is comparable to that using U images or film.

Cited by 9 publications

References 27 publications

The English National Screening Programme for diabetic retinopathy 2003–2016

The English National Screening Programme for diabetic retinopathy 2003–2016

Uncompressed High-Definition Videoconferencing Tools for Telemedicine and Distance Learning

Imaging of Diabetic Retinopathy and Diabetic Macular Edema

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