The training (Tr) data folder has the following sub-folders:

• imagesTr_topbrain_{ct|mr}: Angiographic scans in nifti format, 16-bit signed. LPS+ orientation
  • The nifti filenames are saved with schema: topcow_{modality}_{pat_id}_0000.nii.gz
    • modality: mr for MRA, ct for CTA
    • pat_id: patient ID, 001, 002, ...
• labelsTr_topbrain_{ct|mr}: Multiclass segmentation mask nifti with TopBrain vessel anatomy labels
• itksnap_labelmap_txt: Label-map files with values for each anatomy class that can be loaded to ITK-Snap to visualize the anatomy labels.

@misc{topcowchallenge,
    title={Benchmarking the CoW with the TopCoW Challenge: Topology-Aware Anatomical Segmentation of the Circle of Willis for CTA and MRA},
    author={Kaiyuan Yang and Fabio Musio and Yihui Ma and Norman Juchler and Johannes C. Paetzold and Rami Al-Maskari and Luciano Höher and Hongwei Bran Li and Ibrahim Ethem Hamamci and Anjany Sekuboyina and Suprosanna Shit and Houjing Huang and Chinmay Prabhakar and Ezequiel de la Rosa and Bastian Wittmann and Diana Waldmannstetter and Florian Kofler and Fernando Navarro and Martin Menten and Ivan Ezhov and Daniel Rueckert and Iris N. Vos and Ynte M. Ruigrok and Birgitta K. Velthuis and Hugo J. Kuijf and Pengcheng Shi and Wei Liu and Ting Ma and Maximilian R. Rokuss and Yannick Kirchhoff and Fabian Isensee and Klaus Maier-Hein and Chengcheng Zhu and Huilin Zhao and Philippe Bijlenga and Julien Hämmerli and Catherine Wurster and Laura Westphal and Jeroen Bisschop and Elisa Colombo and Hakim Baazaoui and Hannah-Lea Handelsmann and Andrew Makmur and James Hallinan and Amrish Soundararajan and Bene Wiestler and Jan S. Kirschke and Roland Wiest and Emmanuel Montagnon and Laurent Letourneau-Guillon and Kwanseok Oh and Dahye Lee and Adam Hilbert and Orhun Utku Aydin and Dimitrios Rallios and Jana Rieger and Satoru Tanioka and Alexander Koch and Dietmar Frey and Abdul Qayyum and Moona Mazher and Steven Niederer and Nico Disch and Julius Holzschuh and Dominic LaBella and Francesco Galati and Daniele Falcetta and Maria A. Zuluaga and Chaolong Lin and Haoran Zhao and Zehan Zhang and Minghui Zhang and Xin You and Hanxiao Zhang and Guang-Zhong Yang and Yun Gu and Sinyoung Ra and Jongyun Hwang and Hyunjin Park and Junqiang Chen and Marek Wodzinski and Henning Müller and Nesrin Mansouri and Florent Autrusseau and Cansu Yalçin and Rachika E. Hamadache and Clara Lisazo and Joaquim Salvi and Adrià Casamitjana and Xavier Lladó and Uma Maria Lal-Trehan Estrada and Valeriia Abramova and Luca Giancardo and Arnau Oliver and Paula Casademunt and Adrian Galdran and Matteo Delucchi and Jialu Liu and Haibin Huang and Yue Cui and Zehang Lin and Yusheng Liu and Shunzhi Zhu and Tatsat R. Patel and Adnan H. Siddiqui and Vincent M. Tutino and Maysam Orouskhani and Huayu Wang and Mahmud Mossa-Basha and Yuki Sato and Sven Hirsch and Susanne Wegener and Bjoern Menze},
    year={2025},
    eprint={2312.17670},
    archivePrefix={arXiv},
    primaryClass={cs.CV},
    url={https://arxiv.org/abs/2312.17670},
}