Accelerated liver tumor segmentation in four-phase computed tomography images

• Published in: Journal of real-time image processing Vol. 13; no. 1; pp. 121 - 133
• Main Authors: Chaieb, Faten, Ben Said, Tarek, Mabrouk, Sabra, Ghorbel, Faouzi
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2017; Springer Nature B.V; Springer Verlag
• Subjects: Algorithms; Classification; Computed tomography; Computer Graphics; Computer Science; Computer Vision and Pattern Recognition; Computing time; Fields (mathematics); Image Processing and Computer Vision; Image segmentation; Liver; Medical Imaging; Methods; Multimedia Information Systems; Neighborhoods; Normal distribution; Optimization; Pattern Recognition; Random variables; Resampling; Signal,Image and Speech Processing; Spatial data; Special Issue Paper; Tomography; Tumors; Volume measurement; Segmentation; Liver tumor; Computed tomography; HMRF-EM; Bootstrap resampling
• ISSN: 1861-8200; 1861-8219
• DOI: 10.1007/s11554-016-0578-y

Segmentation and volume measurement of liver tumor are important tasks for surgical planning and cancer follow-up. In this work, a segmentation method from four-phase computed tomography images is proposed. It is based on the combination of the Expectation-Maximization algorithm and the Hidden Markov Random Fields. The latter considers the spatial information given by voxel neighbors of two contrast phases. The segmentation algorithm is applied on a volume of interest that decreases the number of processed voxels. To accelerate the classification steps within the segmentation process, a Bootstrap resampling scheme is also adopted. It consists in selecting randomly an optimal representative set of voxels. The experimental results carried out on three clinical datasets show the performance of our liver tumor segmentation method. It has been notably observed that the computing time of the classification algorithm is reduced without any significant impact on the segmentation accuracy.