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Avni, U., BioMedical Engineering, Tel-Aviv University, Israel
Goldberger, J., Engineering School, Bar-Ilan University, Israel
Sharon, M., Diagnostic Imaging Dept., Sheba Medical Center, France
Konen, E., Diagnostic Imaging Dept., Sheba Medical Center, France
Greenspan, H., BioMedical Engineering, Tel-Aviv University, Israel, IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95129, United States
This work presents a novel approach to chest x-ray characterization. It is based on the generation of a visual words dictionary to represent x-ray images, and similarity-based categorization with a kernel based SVM classifier. Two main tasks are addressed: First, the extraction of chest images from a large radiograph archive, i.e. an organ identification task; Second, the detection and identification of chest pathologies, i.e. shifting from the organ level to a pathology level analysis. We used a large generic archive of 12,000 radiographs (IRMA) to tune the system parameters. We demonstrate automated organ detection on the IRMA collection as well as the generalization to a new data collection. The application is shown to discriminate between healthy and pathology cases, as well as identify specific pathologies on a set of 223 chest radiographs taken from a routine hospital examination. Results indicate detection of pathology at a sensitivity of 88.4% and a specificity of 81%. This is a first step towards similarity-based categorization that has a major clinical importance in computer-assisted diagnostics. Copyright 2010 ACM.
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Chest x-ray characterization: From organ identification to pathology categorization
Avni, U., BioMedical Engineering, Tel-Aviv University, Israel
Goldberger, J., Engineering School, Bar-Ilan University, Israel
Sharon, M., Diagnostic Imaging Dept., Sheba Medical Center, France
Konen, E., Diagnostic Imaging Dept., Sheba Medical Center, France
Greenspan, H., BioMedical Engineering, Tel-Aviv University, Israel, IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95129, United States
Chest x-ray characterization: From organ identification to pathology categorization
This work presents a novel approach to chest x-ray characterization. It is based on the generation of a visual words dictionary to represent x-ray images, and similarity-based categorization with a kernel based SVM classifier. Two main tasks are addressed: First, the extraction of chest images from a large radiograph archive, i.e. an organ identification task; Second, the detection and identification of chest pathologies, i.e. shifting from the organ level to a pathology level analysis. We used a large generic archive of 12,000 radiographs (IRMA) to tune the system parameters. We demonstrate automated organ detection on the IRMA collection as well as the generalization to a new data collection. The application is shown to discriminate between healthy and pathology cases, as well as identify specific pathologies on a set of 223 chest radiographs taken from a routine hospital examination. Results indicate detection of pathology at a sensitivity of 88.4% and a specificity of 81%. This is a first step towards similarity-based categorization that has a major clinical importance in computer-assisted diagnostics. Copyright 2010 ACM.
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