Dear @BraTSChallengeParticipants , Thank you, everyone, for your patience! The mapping for BraTS2021 and TCIA dataset of the training cohort is now --available here--. **EDIT (31 May 2023)**: mapping file has been updated and is now available on the [BraTS 2023 site](syn51156910). If there are any questions, please let the Organizers know in the Discussion Board, either by replying to this post or by posting a new thread.

Created by Verena Chung vchung
All (@waliafarzana, @kiwi, @giemmecci, @jianhongcheng, @Kailai_Liu ), The mapping file for BraTS 2021 and previous years' is now --available here--. **EDIT (31 May 2023)**: mapping file has been updated and is now available on the [BraTS 2023 site](syn51156910). We appreciate your patience!
@ujjwalbaid Hello, any progress on the availability of data maps? Up to now, we have not found the available mapping data, and we hope to open it as soon as possible. This involves the decision-making of our research. Thank you very much for your efforts in this work. :)
@ujjwalbaid Hi, The time is up, the detailed mapping for all the available open-source datasets has not yet been found.
Hello All, Currently, we have provided mapping for the TCIA/TCGA cases for the training cohort of the BraTS2021 challenge. The detailed mapping for all the available open-source datasets (ACRIN-FMISO, CPATC-GBM etc.) and mapping with all the previous BraTS challenges (till BraTS2017) for the BraTS2021 training cohort will be provided on **May** **2, 2022.** Also, the subject IDs for Task 1 and Task 2 corresponds to the same patient data but with different imaging format. For task 1 (segmentation) the data is in nifti while for task 2 (MGMT classification) in dicom file format. Regards, Ujjwal [On behalf of challenge organizing team]
@waliafarzana , @kiwi, @giemmecci -- Your inquiries were sent to the Challenge Organizer, @ujjwalbaid , and he will follow-up!
@vchung Thanks for the reply. I've performed two separate visual inspections of Task 1 and Task 2 cohorts, and I'm pretty confident that Task 2 cohort is a sub-cohort of Task 1 with identical IDs. Still, it would be better to have the organizers confirm this formally. Thanks!
Hi @vchung, Thanks for your reply. What do you mean by "until the dataset is released"? I think the dataset is released, right? As Brats2021 dataset is already publicly available and the Brats2021 challenge is concluded. Also in the Brats2021 website, the dataset will be accompanied by the name mapping file, as described below: > This year we also provide the naming convention and direct filename mapping between the data of BraTS'21-'17, and the subjects used from the data collections of TCGA-GBM, TCGA-LGG, IvyGAP, and CPTAC-GBM, available through The Cancer Imaging Archive (TCIA) to further facilitate research beyond the directly BraTS related tasks. http://braintumorsegmentation.org/ It would be much appreciated if you could let us know whether such name mapping file between the data of BraTS'21-'17 will be released or not, and if so, the estimated date so that we can plan for our research experiment accordingly. Thank you very much!
@vchung - Thank you for your reply. Is there any prospective date when the dataset will be released? Moreover, It would be great to get an answer whether Task-2 is a sub-cohort of Task-1 data with the matched patient ID.
@waliafarzana, @giemmecci, @kiwi - Good questions! Unfortunately, the mapping between BraTS 2021 and the previous years will not be available until the dataset is released. As for the mapping between Task 1 and Task 2, I have forwarded the request on to the Organizers. More information to follow!
Thanks! Would you mind providing the mapping of the full brats2021 dataset with prior brats data, at least with brats2020 would be much appreciated! Thank you!
Thanks! is it possible to also have the mapping between BraTS 2021 and previous versions of BraTS? Also, do we need a formal mapping between Task-1 and Task-2, or is Task-2 a sub-cohort of Task-1 with the same ID? Thanks!
Dear Concerned, there are only 168 cases with TCIA /TCGA dataset, what about the rest of the cases in the training cohort? Moreover, what about the mapping between Task-1 and Task-2 Dataset?

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