Abstract
In this paper, we propose a hybrid deep learning-based method for brain tumor classification using whole slide images (WSIs) and multimodal magnetic resonance image (mMRI). It comprises two methods: a WSI-based method and a mMRI-based method. For the WSI-based method, many patches are sampled from the WSI for each category as the training dataset. However, not all the sampling patches are representative of the category to which their corresponding WSI belongs without the annotations by pathologists. Therefore, some error tolerance schemes were applied when training the classification model to achieve better generalization. For the mMRI-based method, we firstly apply a 3D convolutional neural network (3DCNN) on the multimodal magnetic resonance image (mMRI) for brain tumor segmentation, which distinguishes brain tumors from healthy tissues, then the segmented tumors are used for tumor subtype classification using 3DCNN. Lastly, an ensemble scheme using the two methods was performed to reach a consensus as the final predictions. We evaluate the proposed method with the patient dataset from Computational Precision Medicine: Radiology-Pathology Challenge (CPM: Rad-Path) on Brain Tumor Classification 2020. The performance of the prediction results on the validation set reached 0.886 in f1_micro, 0.801 in kappa, 0.8 in balance_acc, and 0.829 in the overall average. The experimental results show that the performance with the consideration of both MRI and WSI outperforms the performance using single type of image dataset. Accordingly, the fusion from two image datasets can provide more sufficient information in diagnosis for the system.
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Pei, L., Hsu, WW., Chiang, LA., Guo, JM., Iftekharuddin, K.M., Colen, R. (2021). A Hybrid Convolutional Neural Network Based-Method for Brain Tumor Classification Using mMRI and WSI. In: Crimi, A., Bakas, S. (eds) Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries. BrainLes 2020. Lecture Notes in Computer Science(), vol 12659. Springer, Cham. https://doi.org/10.1007/978-3-030-72087-2_43
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