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Participation

Submission

The algorithms are submitted as Docker container images according to the Grand Challenge documentation. You can find a submission template in the TopAneu-26 Repository.

Expected outputs are:

  • Task1: A json file containing the detected locations of the sample, formatted as below. NOTE This is different from the json format the training data is provided as in location_jsons due to compatibility with existing Grand Challenge sockets. NOTE The order of the values in the .json file is not of importance.
[ 
  34,
  35
]
  • Task2: A 1 Channel 3D mask containing the (multi-)instance segmentations as provided in the location_masks in the training data. Must be in the range of our data labels (0-52) and in the datatype 8 bit unsigned integer.

TIP Take a look at our submission templates to base your docker image on, a more detailed description of the template is in the README.

Limits

NEW: Every team or person can submit twice per day to the sanity check phases and only once over the whole submission period to the final submission phases. The sanity check phase is meant to first test if your implementation works and debug if it doesn't (Only successful runs contribute to the submission limit).

Leaderboards

Task1 and Task2 are closely related. Please do not submit to Task1 if you are using the same algorithm as in Task2. We will fuse the classification results from Task2 into the official Task1 leaderboard for our workshop. The leaderboards on this platform will automatically populate for each task separately.

NEW Runtime Environment

There are limited resources available for your solution, please keep these in mind when designing your approach:

  • The maximum processing time per case for each phase is set to 12 minutes, after this time your container will be terminated and considered failed.
  • Your container can request a maximum of 32 GB RAM (1 GB of which is reserved for operation purposes)
  • Your container can request an NVIDIA T4 GPU with 16 GB of VRAM

Rules

Exclusion Policy

We reserve the right to exclude from TopAneu-26 challenge those participants/teams breaking any of these rules.

Account and Team

  • A single account per participant. You can not submit from multiple grand-challenge accounts. Each participant is allowed to solely submit from a single account.
  • Each participant can join at most one team.
  • Participants in a team are not allowed to make individual submissions outside of their team, as this unfairly increases the submission chances
  • Only one member of each team can submit algorithms, we will exclude duplicate submissions from the final leaderboards.
  • Normally, each participant/team can only submit one algorithm to each final test phase.
  • If you or your team have sufficiently distinct algorithms, you may submit more than one algorithm to a final test phase, subject to approval from us.
  • Please reach out to us if want to split into sub-teams or submit different algorithms.
  • We will exclude anonymous submissions unless we can verify your profile.

Code-sharing

Participants are only allowed to share scripts among their team members. Code sharing with other participants should be made publicly available through our forum.

Members of the Organizing Institutes

Members of the organizers' direct research groups can participate and their results can be included in the publications and the leaderboard. However, they are not eligible for awards. This policy also applies to teams that include such members.

Data Usage

We provide training data from multiple centers for this challenge. Usage of external data is permitted, however in this case you also need to provide your models trained without external data for a more fair comparison in our challenge manuscript. The usage of external data must be transparently communicated in the submission. If you used external training data and are invited to contribute to the challenge manuscript we will reach out to request your method trained on TopAneu-26 data only.

Publication Policy

The challenge results will be summarized and published in a journal manuscript. The top 5 scoring solutions from each task will be invited to contribute to our publication.

Each submission can have maximum three co-authorships for the challenge paper. Additional authors from the top submissions can be included upon request with justification according to the ICMJE authorship guidelines.

Participating teams may submit their results separately without any publication embargo

Last Updated: 20 Aug 2026