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Fractal dimension analysis of malignant and benign endobronchial ultrasound nodes
Fiz Fernández, José Antonio; Monte Moreno, Enrique; Andreo, Felipe; Auteri, Santiago Jose; Sanz Santos, Jose; Serra Coromina, Pere; Bonet, Gloria; Castella, Eva; Ruiz Manzano, Juan
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla
Background: Endobronchial ultrasonography (EBUS) has been applied as a routine procedure for the diagnostic of hiliar and mediastinal nodes. The authors assessed the relationship between the echographic appearance of mediastinal nodes, based on endobronchial ultrasound images, and the likelihood of malignancy.; Methods: The images of twelve malignant and eleven benign nodes were evaluated. A previous processing method was applied to improve the quality of the images and to enhance the details. Texture and morphology parameters analyzed were: the image texture of the echographies and a fractal dimension that expressed the relationship between area and perimeter of the structures that appear in the image, and characterizes the convoluted inner structure of the hiliar and mediastinal nodes.; Results: Processed images showed that relationship between log perimeter and log area of hilar nodes was lineal (i.e. perimeter vs. area follow a power law). Fractal dimension was lower in the malignant nodes compared with non-malignant nodes (1.47(0.09), 1.53(0.10) mean(SD), Mann-Whitney U test p < 0.05)).; Conclusion: Fractal dimension of ultrasonographic images of mediastinal nodes obtained through endobronchial ultrasound differ in malignant nodes from non-malignant. This parameter could differentiate malignat and non-malignat mediastinic and hiliar nodes.
Peer Reviewed
Àrees temàtiques de la UPC::Ciències de la salut::Medicina
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo
Diagnostic ultrasonic imaging
Lung diseases
Transbronchial needle aspiration
Lung-cancer
Lymph-nodes
Diagnosis
Disease
Images
Imatges ultrasonores
Aparell respiratori -- Malalties
Reconeixement 3.0 Espanya
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/publishedVersion
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