Ultra-Low Dose PET Imaging Challenge 2025

Update!

You are welcome to download the train dataset of UDPET Challenge 2025 for research purpose.

To access the data, please first download the Data Transfer Agreement (DTA) from the link below:

https://drive.google.com/file/d/1-dGYEB6lWSJeY8eI5XFtT3MtJGOqXAX1/view?usp=sharing

You’ll receive the download link for the dataset once you send back the signed DTA to: yizhou.chen@students.unibe.ch OR alejandro.lopez@unibe.ch

UDPET Challenge 2025 is Coming !

To Participants

Dear participants of the Ultra-Low Dose PET Imaging (UDPET) Challenge,

We would like to express our sincere gratitude for your interest and valuable contributions to the UDPET imaging challenge over the past three years. We are thrilled to announce the continuation of the challenge with UDPET 2025. A comprehensive workshop will be held at IEEE MIC 2025 on November 8th. Participants ranked within the top 5 will be invited to present their work at the IEEE MIC 2025 Ultra-low-dose PET imaging workshop, which can be found at the following link: https://nssmic.ieee.org/2025/program/.

  • Availability of the evaluation code: https://drive.google.com/file/d/1n2n1mqFz_QCP4G3A9pXk88TOrcdiWUNi/view?usp=sharing

  • Test data release date: Oct. 20th. The test data will be in nifti format (Unit:Bq/ml) with an extra CSV file that contains meta information present in the dicom header (weight, injected activity, the difference between acquisition datetime and radiopharmaceutical start datetime, radioisotope half life). The decay correction attribute (dicom tag: (0054,1102)) of all the test data is “START” (https://dicom.innolitics.com/ciods/positron-emission-tomography-image/pet-series/00541102).

  • Test Dataset: All the registered participants will receive an email containing the link to the test dataset before Oct. 20th if you do not receive it, please contact us.

  • Prize: 1st Place 1600 USD, 2nd Place 1000 USD, 3rd Place 600 USD

  • The top 3 ranked teams will be eligible for an award and the best 5 classified teams will have the chance to present their work at theworkshop hosted at IEEE NSS/MIC on the 8th of November (10 mins talk + 2 mins questions).

Important Dates

  • Pre-register via email to alejandro.lopez@unibe.ch to confirm a submission: Oct. 12th (DDL_1)
  • Final submission deadline: Oct. 27th (DDL_2)
  • Notification of rankings and invitations will be sent out on: Nov. 1st

We will provide updates and announcements regarding the challenge on our website: https://udpet-challenge.github.io/

Participation Requirements:

To ensure successful participation and eligibility for prizes, all participants must adhere to the following requirements:

  • Pre-register via Email before DDL_1
  • Submit the necessary material before the DDL_2 of 23:59 (pacific day time)
    • A short paper or abstract about your method (maximum 1-page or 500 words whatever is reached first)
    • Algorithms scripts or link to your Github repository
    • Generated Full dose image in nifti format (Unit:Bq/ml), recovered from dose reduced images in Test dataset (Please put all predictions in a separate folder and use the same filename as the input file. You can send us by email with a google drive link to your folder that contains your output test data.)

Should you have any questions or require further clarification, please do not hesitate to contact us. We wish you the best of luck in the UDPET challenge.

Best regards,

Kuangyu Shi, Rui Guo, Alejandro Lopez-Montes, Yizhou Chen, Hanzhong Wang, Axel Rominger, and Biao Li