Dear Participants, Thank you for your active participation in the LISA 2026 challenge. Please carefully review the following instructions regarding Docker submissions for Test Phase: Eligibility: Only individuals or teams that have submitted a short-paper are eligible to participate in the Test Phase. All authors listed in short-paper must register for a Synapse account and individually submit a completed Data Agreement in order to be eligible. The test phase is open until July 20, 2026. No further extensions will be granted. After you submit your Docker image, our system will automatically execute it. 1. **Received** indicates that your submission has been successfully uploaded. 2. **Accepted** indicates that your Docker container has executed successfully and produced valid outputs. You will also receive an email notification when your submission is accepted. 3. **Invalid** indicates that your Docker container did not run successfully or produced invalid outputs. In this case, you will receive an email notification. Please check the submission logs, make the necessary modifications, and resubmit. **Submission Limits:** 1. The number of Accepted submissions is limited to **two (2)** per team per task. And for final ranking we will use your last **ACCEPTED** submission before the deadline. 2. There is no limit on submissions that result in other statuses (e.g., Invalid). **System Constraint:** 1. Docker containers are executed with a memory limit of **24 GB**. Please ensure your image can run within this constraint. 2. ⚠️ All containers are run in a completely **offline** environment. Do not attempt to download any files or packages inside your Docker container; such attempts will fail and the submission will be marked Invalid. **Output Requirement:** 1. Your container must write the prediction results as .csv or .nii.gz files inside the **/output** directory. 2. ⚠️ Do not compress results into .zip files. **Scoring and Ranking:** 1. Scores will not be displayed in the Synapse tables during the Testing Phase. 2. All submissions will be evaluated internally, and teams will be ranked accordingly. 3. Top three teams for each task will be contacted on **July 31st**. We appreciate your efforts and contributions, and we look forward to your continued participation. Best regards, The LISA 2026 Challenge Organizers