Abstract
In this paper, we propose a novel method for single-channel blind separation of nonoverlapped sources and, to the best of our knowledge, apply it for the first time to automatic segmentation of lung tumors in positron emission tomography (PET) images. Our approach first converts a 3-D PET image into a pseudo-multichannel image. Afterward, regularization free sparseness constrained non-negative matrix factorization is used to separate tumor from other tissues. By using complexity based criterion, we select tumor component as the one with minimal complexity. We have compared the proposed method with threshold based on 40% and 50% maximum standardized uptake value (SUV), graph cuts (GC), random walks (RW), and affinity propagation (AP) algorithms on 18 nonsmall cell lung cancer datasets with respect to ground truth (GT) provided by two radiologists. Dice similarity coefficient averaged with respect to two GTs is: 0.78 ± 0.12 by the proposed algorithm, 0.78 ± 0.1 by GC, 0.77 ± 0.13 by AP, 0.77 ± 0.07 by RW, and 0.75 ± 0.13 by 50% maximum SUV threshold. Since the proposed method achieved performance comparable with interactive methods, considering the unique challenges of lung tumor segmentation from PET images, our findings support possibility of using our fully automated method in routine clinics. The source codes will be available at www.mipav.net/English/research/research.html.
Original language | English (US) |
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Article number | 7733134 |
Pages (from-to) | 1656-1666 |
Number of pages | 11 |
Journal | IEEE Journal of Biomedical and Health Informatics |
Volume | 21 |
Issue number | 6 |
DOIs | |
State | Published - Nov 2017 |
Funding
Manuscript received June 6, 2016; revised September 22, 2016 and October 31, 2016; accepted November 1, 2016. Date of publication November 3, 2016; date of current version November 3, 2017. This work was supported in part by the bilateral Chinese–Croatian Grant “Dealina-tion of lung tumor though nonlinear decomposition of PET/CT image;” in part by the Croatian Science Foundation Grant “Structured Decompositions of Empirical Data for Computationally-Assisted Diagnoses of Disease;” in part by the National Basic Research Program of China (973 Program) under Grant 2014CB748600; and in part by the National Natural Science Foundation of China under Grant 81371629. (Corresponding author: Xinjian Chen.) I. Kopriva is with the Division of Electronics, Ruđer Bosˇković Institute, Zagreb 10000, Croatia (e-mail: [email protected]).
Keywords
- Lung tumor delineation
- non-negative matrix factorization (NMF)
- positron emission tomography (PET)
- single-channel blind source separation
- sparseness
ASJC Scopus subject areas
- Computer Science Applications
- Health Informatics
- Electrical and Electronic Engineering
- Health Information Management