Texture analysis for tissue discrimination on T1-weighted MR images of the knee joint in a multicenter study: Transferability of texture features and comparison of feature selection methods and classifiers.
J Magn Reson Imaging
; 22(5): 674-80, 2005 Nov.
Article
em En
| MEDLINE
| ID: mdl-16215966
ABSTRACT
PURPOSE:
To investigate the reproducibility and transferability of texture features between MR centers, and to compare two feature selection methods and two classifiers. MATERIALS ANDMETHODS:
Coronal T1-weighted MR images of the knees of 63 patients, divided into three groups, were included in the study. MR images were obtained at three different MR centers. Regions of interest (ROIs) were drawn in the bone marrow and fat tissue. Then texture analysis (TA) of the ROIs was performed, and the most discriminant features were identified using Fisher coefficients and POE+ACC (probability of classification error and average correlation coefficients). Based on these features, artificial neural network (ANN) and k-nearest-neighbor (k-NN) classifiers were used for tissue discrimination.RESULTS:
Although the texture features differed among the MR centers, features from one center could be successfully used for tissue discrimination in texture data on MR images from other centers. The best results were achieved using the ANN classifier in combination with features selected by POE+ACC.CONCLUSION:
The differences in texture features extracted from MR images from different centers seem to have only a small impact on the results of tissue discrimination.
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Base de dados:
MEDLINE
Assunto principal:
Doenças da Medula Óssea
/
Reconhecimento Automatizado de Padrão
/
Inteligência Artificial
/
Imageamento por Ressonância Magnética
/
Interpretação de Imagem Assistida por Computador
/
Edema
/
Articulação do Joelho
Tipo de estudo:
Clinical_trials
/
Diagnostic_studies
/
Prognostic_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Magn Reson Imaging
Assunto da revista:
DIAGNOSTICO POR IMAGEM
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Áustria