The challenge organizers will provide 30 3D T1- and T2-weighted sequences of brain MRI acquired at three different resolutions (high/diagnostic quality, half, and one-quarter) using the 3T Discovery MR750 scanner by General Electric (Waukesha, WI) for training. Training data can be accessed using this link. The data is distributed under Creative Commons License (CC BY-NC-ND; https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode ). Team registration and acceptance to license agreement is required prior to accessing the data.