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    Robust deep learning-based segmentation of glioblastoma on routine clinical mri scans using sparsified training

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    Authors
    Eijgelaar, R. S.
    Visser, M.
    Müller, D. M. J.
    Barkhof, F.
    Vrenken, H.
    van Herk, Marcel
    Bello, L.
    Conti Nibali, M.
    Rossi, M.
    Sciortino, T.
    Berger, M. S.
    Hervey-Jumper, S.
    Kiesel, B.
    Widhalm, G.
    Furtner, J.
    Robe, P.
    Mandonnet, E.
    De Witt Hamer, P. C.
    de Munck, J. C.
    Witte, M. G.
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    Affiliation
    Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands
    Issue Date
    2020
    
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    Abstract
    Purpose: To improve the robustness of deep learning-based glioblastoma segmentation in a clinical setting with sparsified datasets. Materials and methods: In this retrospective study, preoperative T1-weighted, T2-weighted, T2-weighted fluid-attenuated inversion recovery, and postcontrast T1-weighted MRI from 117 patients (median age, 64 years; interquartile range [IQR], 55-73 years; 76 men) included within the Multimodal Brain Tumor Image Segmentation (BraTS) dataset plus a clinical dataset (2012-2013) with similar imaging modalities of 634 patients (median age, 59 years; IQR, 49-69 years; 382 men) with glioblastoma from six hospitals were used. Expert tumor delineations on the postcontrast images were available, but for various clinical datasets, one or more sequences were missing. The convolutional neural network, DeepMedic, was trained on combinations of complete and incomplete data with and without site-specific data. Sparsified training was introduced, which randomly simulated missing sequences during training. The effects of sparsified training and center-specific training were tested using Wilcoxon signed rank tests for paired measurements. Results: A model trained exclusively on BraTS data reached a median Dice score of 0.81 for segmentation on BraTS test data but only 0.49 on the clinical data. Sparsified training improved performance (adjusted P < .05), even when excluding test data with missing sequences, to median Dice score of 0.67. Inclusion of site-specific data during sparsified training led to higher model performance Dice scores greater than 0.8, on par with a model based on all complete and incomplete data. For the model using BraTS and clinical training data, inclusion of site-specific data or sparsified training was of no consequence. Conclusion: Accurate and automatic segmentation of glioblastoma on clinical scans is feasible using a model based on large, heterogeneous, and partially incomplete datasets. Sparsified training may boost the performance of a smaller model based on public and site-specific data.Supplemental material is available for this article.Published under a CC BY 4.0 license.
    Citation
    Eijgelaar RS, Visser M, Müller DMJ, Barkhof F, Vrenken H, van Herk M, et al. Robust Deep Learning–based Segmentation of Glioblastoma on Routine Clinical MRI Scans Using Sparsified Training. Radiology: Artificial Intelligence. 2020 Sep 1;2(5):e190103.
    Journal
    Radiology: Artificial Intelligence
    URI
    http://hdl.handle.net/10541/624027
    DOI
    10.1148/ryai.2020190103
    PubMed ID
    33937837
    Additional Links
    https://dx.doi.org/10.1148/ryai.2020190103
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.1148/ryai.2020190103
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