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• W2531806530 abstract "Tumor segmentation is a particularly challenging task in high-grade gliomas (HGGs), as they are among the most heterogeneous tumors in oncology. An accurate delineation of the lesion and its main subcomponents contributes to optimal treatment planning, prognosis and follow-up. Conventional MRI (cMRI) is the imaging modality of choice for manual segmentation, and is also considered in the vast majority of automated segmentation studies. Advanced MRI modalities such as perfusion-weighted imaging (PWI), diffusion-weighted imaging (DWI) and magnetic resonance spectroscopic imaging (MRSI) have already shown their added value in tumor tissue characterization, hence there have been recent suggestions of combining different MRI modalities into a multi-parametric MRI (MP-MRI) approach for brain tumor segmentation. In this paper, we compare the performance of several unsupervised classification methods for HGG segmentation based on MP-MRI data including cMRI, DWI, MRSI and PWI. Two independent MP-MRI datasets with a different acquisition protocol were available from different hospitals. We demonstrate that a hierarchical non-negative matrix factorization variant which was previously introduced for MP-MRI tumor segmentation gives the best performance in terms of mean Dice-scores for the pathologic tissue classes on both datasets." @default.
• W2531806530 created "2016-10-21" @default.
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• W2531806530 date "2016-02-01" @default.
• W2531806530 modified "2023-10-16" @default.
• W2531806530 title "Comparison of unsupervised classification methods for brain tumor segmentation using multi-parametric MRI" @default.
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• W2531806530 doi "https://doi.org/10.1016/j.nicl.2016.09.021" @default.
• W2531806530 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5079350" @default.
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