Content-based Image Retrieval in Medical Applications

T. M. Lehmann; M. O. Güld; C. Thies; B. Fischer; K. Spitzer; D. Keysers; H. Ney; M. Kohnen; H. Schubert; B. B. Wein

doi:10.1055/s-0038-1633877

Methods of Information in Medicine, Inhaltsverzeichnis

Methods Inf Med 2004; 43(04): 354-361
DOI: 10.1055/s-0038-1633877

Original Article

Schattauer GmbH

Content-based Image Retrieval in Medical Applications

Authors

T. M. Lehmann

¹Department of Medical Informatics, Aachen University of Technology (RWTH), Aachen, Germany
M. O. Güld

¹Department of Medical Informatics, Aachen University of Technology (RWTH), Aachen, Germany
C. Thies

¹Department of Medical Informatics, Aachen University of Technology (RWTH), Aachen, Germany
B. Fischer

¹Department of Medical Informatics, Aachen University of Technology (RWTH), Aachen, Germany
K. Spitzer

¹Department of Medical Informatics, Aachen University of Technology (RWTH), Aachen, Germany
D. Keysers

²Chair of Computer Science VI, Aachen University of Technology (RWTH), Aachen, Germany
H. Ney

²Chair of Computer Science VI, Aachen University of Technology (RWTH), Aachen, Germany
M. Kohnen

³Department of Diagnostic Radiology, Aachen University of Technology (RWTH), Aachen, Germany
H. Schubert

³Department of Diagnostic Radiology, Aachen University of Technology (RWTH), Aachen, Germany
B. B. Wein

³Department of Diagnostic Radiology, Aachen University of Technology (RWTH), Aachen, Germany

Abstract

Summary

Objectives: To develop a general structure for semantic image analysis that is suitable for content-based image retrieval in medical applications and an architecture for its efficient implementation.

Methods: Stepwise content analysis of medical images results in six layers of information modeling incorporating medical expert knowledge (raw data layer, registered data layer, feature layer, scheme layer, object layer, knowledge layer). A reference database with 10,000 images categorized according to the image modality, orientation, body region, and biological system is used. By means of prototypes in each category, identification of objects and their geometrical or temporal relationships are handled in the object and the knowledge layer, respectively. A distributed system designed with only three core elements is implemented: (i) the central database holds program sources, processing scheme descriptions, images, features, and administrative information about the workstation cluster; (ii) the scheduler balances distributed computing; and (iii) the web server provides graphical user interfaces for data entry and retrieval, which can be easily adapted to a variety of applications for content-based image retrieval in medicine.

Results: Leaving-one-out experiments were distributed by the scheduler and controlled via corresponding job lists offering transparency regarding the viewpoints of a distributed system and the user. The proposed architecture is suitable for content-based image retrieval in medical applications. It improves current picture archiving and communication systems that still rely on alphanumerical descriptions, which are insufficient for image retrieval of high recall and precision.

Keywords

Information storage and retrieval - information management - pattern recognition - computer-assisted image processing

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Referenzen

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