Identifying Regions of Interest in Medical Images Using Self-Organizing Maps

Authors:
Wei-Guang Teng;Ping-Lin Chang
Affiliations:
Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan and , Tainan, Taiwan 701;Department of Computing, Imperial College London, London, UK
Venue:
Journal of Medical Systems
Year:
2012

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Abstract

Advances in data acquisition, processing and visualization techniques have had a tremendous impact on medical imaging in recent years. However, the interpretation of medical images is still almost always performed by radiologists. Developments in artificial intelligence and image processing have shown the increasingly great potential of computer-aided diagnosis (CAD). Nevertheless, it has remained challenging to develop a general approach to process various commonly used types of medical images (e.g., X-ray, MRI, and ultrasound images). To facilitate diagnosis, we recommend the use of image segmentation to discover regions of interest (ROI) using self-organizing maps (SOM). We devise a two-stage SOM approach that can be used to precisely identify the dominant colors of a medical image and then segment it into several small regions. In addition, by appropriately conducting the recursive merging steps to merge smaller regions into larger ones, radiologists can usually identify one or more ROIs within a medical image.