Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Oftalmologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802022000100229 |
Resumo: | ABSTRACT Purpose To evaluate the retinal blood vascular network of the retinographies of patients with different grades of diabetic retinopathy. Methods Ninety Retinographies (MESSIDOR database) were used, with different grades of diabetic retinopathy divided into 4 groups: no retinopathy (n=23), grade one (n=20), grade two (n=20) and grade three (n=27) diabetic retinopathy. The grades of diabetic retinopathy were classified according to the number of microaneurysms, number of hemorrhages and the presence of neovascularization. The images were skeletonized and quantified by fractal methods: dimension of box-counting (Dbc) and information (Dinf). Results The means of Dbc values of groups were around 1.25, without statistically significant difference in the dimension values between groups for whole retina. There was also no statistical difference in Dinf values between groups, whose means ranged between 1.294 ± 0.013 (group of grade 1) and 1.3 ± 0.017 (group of grade 3). The retinographies were divided into regions of equal areas. The fractal values of some retinal regions showed statistical differences, but these differences were not enough to show the sensitivity of fractal methods in identifying diabetic retinopathy. Conclusion The fractal methods were not able to identify the different grades of diabetic retinopathy in retinographies. |
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Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathyFractal dimensionDiabetic retinopathyVascular networkRetinographySkeletonizationBox-counting and information dimensionABSTRACT Purpose To evaluate the retinal blood vascular network of the retinographies of patients with different grades of diabetic retinopathy. Methods Ninety Retinographies (MESSIDOR database) were used, with different grades of diabetic retinopathy divided into 4 groups: no retinopathy (n=23), grade one (n=20), grade two (n=20) and grade three (n=27) diabetic retinopathy. The grades of diabetic retinopathy were classified according to the number of microaneurysms, number of hemorrhages and the presence of neovascularization. The images were skeletonized and quantified by fractal methods: dimension of box-counting (Dbc) and information (Dinf). Results The means of Dbc values of groups were around 1.25, without statistically significant difference in the dimension values between groups for whole retina. There was also no statistical difference in Dinf values between groups, whose means ranged between 1.294 ± 0.013 (group of grade 1) and 1.3 ± 0.017 (group of grade 3). The retinographies were divided into regions of equal areas. The fractal values of some retinal regions showed statistical differences, but these differences were not enough to show the sensitivity of fractal methods in identifying diabetic retinopathy. Conclusion The fractal methods were not able to identify the different grades of diabetic retinopathy in retinographies.Sociedade Brasileira de Oftalmologia2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802022000100229Revista Brasileira de Oftalmologia v.81 2022reponame:Revista Brasileira de Oftalmologia (Online)instname:Sociedade Brasileira de Oftalmologia (SBO)instacron:SBO10.37039/1982.8551.20220060info:eu-repo/semantics/openAccessCosta,Edbhergue Ventura LolaAraújo,Victor Felipe da SilvaNogueira,Romildo de Albuquerqueeng2022-10-07T00:00:00Zoai:scielo:S0034-72802022000100229Revistahttps://rbo.emnuvens.com.br/rbo/indexhttps://old.scielo.br/oai/scielo-oai.phpsob@sboportal.org.br||rbo@sboportal.org.br1982-85510034-7280opendoar:2022-10-07T00:00Revista Brasileira de Oftalmologia (Online) - Sociedade Brasileira de Oftalmologia (SBO)false |
dc.title.none.fl_str_mv |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
title |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
spellingShingle |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy Costa,Edbhergue Ventura Lola Fractal dimension Diabetic retinopathy Vascular network Retinography Skeletonization Box-counting and information dimension |
title_short |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
title_full |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
title_fullStr |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
title_full_unstemmed |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
title_sort |
Fractal evaluation in retinographies of individuals with different grades of diabetic retinopathy |
author |
Costa,Edbhergue Ventura Lola |
author_facet |
Costa,Edbhergue Ventura Lola Araújo,Victor Felipe da Silva Nogueira,Romildo de Albuquerque |
author_role |
author |
author2 |
Araújo,Victor Felipe da Silva Nogueira,Romildo de Albuquerque |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Costa,Edbhergue Ventura Lola Araújo,Victor Felipe da Silva Nogueira,Romildo de Albuquerque |
dc.subject.por.fl_str_mv |
Fractal dimension Diabetic retinopathy Vascular network Retinography Skeletonization Box-counting and information dimension |
topic |
Fractal dimension Diabetic retinopathy Vascular network Retinography Skeletonization Box-counting and information dimension |
description |
ABSTRACT Purpose To evaluate the retinal blood vascular network of the retinographies of patients with different grades of diabetic retinopathy. Methods Ninety Retinographies (MESSIDOR database) were used, with different grades of diabetic retinopathy divided into 4 groups: no retinopathy (n=23), grade one (n=20), grade two (n=20) and grade three (n=27) diabetic retinopathy. The grades of diabetic retinopathy were classified according to the number of microaneurysms, number of hemorrhages and the presence of neovascularization. The images were skeletonized and quantified by fractal methods: dimension of box-counting (Dbc) and information (Dinf). Results The means of Dbc values of groups were around 1.25, without statistically significant difference in the dimension values between groups for whole retina. There was also no statistical difference in Dinf values between groups, whose means ranged between 1.294 ± 0.013 (group of grade 1) and 1.3 ± 0.017 (group of grade 3). The retinographies were divided into regions of equal areas. The fractal values of some retinal regions showed statistical differences, but these differences were not enough to show the sensitivity of fractal methods in identifying diabetic retinopathy. Conclusion The fractal methods were not able to identify the different grades of diabetic retinopathy in retinographies. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802022000100229 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802022000100229 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.37039/1982.8551.20220060 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Oftalmologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Oftalmologia |
dc.source.none.fl_str_mv |
Revista Brasileira de Oftalmologia v.81 2022 reponame:Revista Brasileira de Oftalmologia (Online) instname:Sociedade Brasileira de Oftalmologia (SBO) instacron:SBO |
instname_str |
Sociedade Brasileira de Oftalmologia (SBO) |
instacron_str |
SBO |
institution |
SBO |
reponame_str |
Revista Brasileira de Oftalmologia (Online) |
collection |
Revista Brasileira de Oftalmologia (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Oftalmologia (Online) - Sociedade Brasileira de Oftalmologia (SBO) |
repository.mail.fl_str_mv |
sob@sboportal.org.br||rbo@sboportal.org.br |
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1752122339598794752 |