Automatic segmentation system for liver tumors based on the multilevel thresholding and electromagnetism optimization algorithm |
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Authors: | Lamia N Mahdy Kadry A Ezzat Mohamed Torad Aboul E Hassanien |
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Affiliation: | 1. Higher Technological Institute, Biomedical Engineering Department, 10th of Ramadan City, Egypt
Scientific Research Group in Egypt (SRGE), Cairo, Egypt;2. Higher Technological Institute, Biomedical Engineering Department, 10th of Ramadan City, Egypt;3. Higher Technological Institute, Electrical Engineering Department, 10th of Ramadan City, Egypt;4. Scientific Research Group in Egypt (SRGE), Cairo, Egypt
Faculty of Computers and Artificial Intelligence, Cairo University, Cairo, Egypt |
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Abstract: | In this article, we propose an automated segmentation system for liver tumors using magnetic resonance imaging and computed tomography. The proposed system is based on the algorithm of multilevel thresholding with electromagnetism optimization (EMO). The system starts with visualizing a patient's digital communication in medicine (DICOM) abdominal data set in three views. Two-stage active contour segmentation methods that integrate region-based local and global techniques using the active geodesic contour technique are proposed to segment the liver. To increase the accuracy and speed of segmentation for liver images, we identify the optimal threshold of the image segmentation method based on EMO with Otsu and Kapur algorithms. EMO offers interesting search capabilities while keeping a low computational cost. The proposed system was tested using a set of five DICOM data sets. All images were of the same size and stored in JPEG format (512 × 512 pixels). Experimental results illustrate that the proposed system outperforms state-of-the-art methods such as the watershed algorithm. The average sensitivity, specificity, and accuracy of the segmented liver using the active contour model were 97.05%, 99.88%, and 98.47%, respectively. Moreover, the average sensitivity, specificity, and accuracy of the segmented liver tumor results were 94.15%, 99.57%, and 96.86%, respectively. |
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Keywords: | liver multilevel thresholding optimization Otsu tumor segmentation |
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