![]() Subsequently, all the pre-operative TCIA scans (135 GBM and 108 LGG) were annotated by experts for the various glioma sub-regions and included in this year's BraTS datasets. For BraTS'17, expert neuroradiologists have radiologically assessed the complete original TCIA glioma collections (TCGA-GBM, n=262 and TCGA-LGG, n=199) and categorized each scan as pre- or post-operative. The data used during BraTS'14-'16 (from TCIA) have been discarded, as they described a mixture of pre- and post-operative scans and their ground truth labels have been annotated by the fusion of segmentation results from algorithms that ranked highly during BraTS'12 and '13. The only data that have been previously used and are utilized again (during BraTS'17-'20) are the images and annotations of BraTS'12-'13, which have been manually annotated by clinical experts in the past. The BraTS data provided since BraTS'17 differs significantly from the data provided during the previous BraTS challenges (i.e., 2016 and backwards). The provided data are distributed after their pre-processing, i.e., co-registered to the same anatomical template, interpolated to the same resolution (1 mm^3) and skull-stripped. Annotations comprise the GD-enhancing tumor ( ET - label 4), the peritumoral edema ( ED - label 2), and the necrotic and non-enhancing tumor core ( NCR/NET - label 1), as described both in the BraTS 2012-2013 TMI paper and in the latest BraTS summarizing paper. Imaging Data DescriptionĪll BraTS multimodal scans are available as NIfTI files (.nii.gz) and describe a) native ( T1) and b) post-contrast T1-weighted ( T1Gd), c) T2-weighted ( T2), and d) T2 Fluid Attenuated Inversion Recovery ( T2-FLAIR) volumes, and were acquired with different clinical protocols and various scanners from multiple (n=19) institutions, mentioned as data contributors here.Īll the imaging datasets have been segmented manually, by one to four raters, following the same annotation protocol, and their annotations were approved by experienced neuro-radiologists. The top-ranked participating teams will be invited by September 16, to prepare their slides for a short oral presentation of their method during the BraTS challenge. Please note that the testing data will only be available to actual participants of the challenge and during the challenge's testing phase. The ground truth of the validation data will not be provided to the participants, but multiple submissions to the online evaluation platform ( CBICA's IPP) will be allowed.įinally, all participants will be presented with the same test data, which will be made available during 29 August and 12 September and for a limited controlled time-window (48h), before the participants are required to upload their final results in CBICA's IPP. This, will allow participants to obtain preliminary results in unseen data and also report it in their submitted papers (due on August 23), in addition to their cross-validated results on the training data. ![]() ![]() ![]() Validation data will be released on July 1, through an email pointing to the accompanying leaderboard. Specifically, the datasets used in this year's challenge have been updated, since BraTS'19, with more routine clinically-acquired 3T multimodal MRI scans, with accompanying ground truth labels by expert board-certified neuroradiologists. To register for participation and get access to the BraTS 2020 data, you can follow the instructions given at the "Registration/Data Request" page.Īmple multi-institutional routine clinically-acquired pre-operative multimodal MRI scans of glioblastoma (GBM/HGG) and lower grade glioma (LGG), with pathologically confirmed diagnosis and available OS, are provided as the training, validation and testing data for this year’s BraTS challenge. ![]()
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