Can the fractal dimension be applied for the early diagnosis of non-proliferative diabetic retinopathy?
Braz. j. med. biol. res
; 42(10): 930-934, Oct. 2009. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-526183
Biblioteca responsável:
BR1.1
ABSTRACT
The fractal dimension has been employed as a useful parameter in the diagnosis of retinal disease. Avakian et al. (Curr Eye Res 2002; 24 274-280), comparing the vascular pattern of normal patients with mild to moderate non-proliferative diabetic retinopathy (NPDR), found a significant difference between them only in the macular region. This significant difference in the box-counting fractal dimension of the macular region between normal and mild NPDR patients has been proposed as a method of precocious diagnosis of NPDR. The aim of the present study was to determine if fractal dimensions can really be used as a parameter for the early diagnosis of NPDR. Box-counting and information fractal dimensions were used to parameterize the vascular pattern of the human retina. The two methods were applied to the whole retina and to nine anatomical regions of the retina in 5 individuals with mild NPDR and in 28 diabetic but opthalmically normal individuals (controls), with age between 31 and 86 years. All images of retina were obtained from the Digital Retinal Images for Vessel Extraction (DRIVE) database. The results showed that the fractal dimension parameter was not sensitive enough to be of use for an early diagnosis of NPDR.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Vasos Retinianos
/
Fractais
/
Retinopatia Diabética
Tipo de estudo:
Estudo diagnóstico
/
Estudo observacional
/
Estudo de rastreamento
Limite:
Adulto
/
Idoso
/
Idoso, 80 anos ou mais
/
Humanos
Idioma:
Inglês
Revista:
Braz. j. med. biol. res
Assunto da revista:
Biologia
/
Medicina
Ano de publicação:
2009
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal Rural de Pernambuco/BR
/
Universidade Federal de Pernambuco/BR