In support of recent security directives, NIH is implementing a technical update to enhance security measures focused on protecting data provided by NIH Controlled-Access Data Repositories (CADRs). Specifically, as of April 4, 2025, NIH is prohibiting access to and ending any remaining ongoing projects involving NIH CADRs and associated data by researchers and institutions located in countries of concern. These countries include China (including Hong Kong and Macau), Russia, Iran, North Korea, Cuba, and Venezuela, consistent with EO 14117 and 28 CFR Part 202 “Preventing Access to U.S. Sensitive Personal Data and Government-Related Data by Countries of Concern or Covered Persons.” Please see Guide Notice NOT-OD-25-083 for more details. Any questions about this change can be submitted to gds@mail.nih.gov.
In order to comply with this new NIH policy,
- TCIA is currently unable to process new controlled data access requests. We are actively working on implementing new controlled access data requirements mandated by this directive, and will update this page with more details as they become available.
- Users with existing Data Usage Agreements on file may have had their accounts disabled. If you have an active limited access license, are not from a country of concern, and are having trouble accessing the dataset(s), please contact our helpdesk (help@cancerimagingarchive.net).
- Some of our datasets are “controlled access” due to re-identification risks associated with reconstructing 3D radiological images of the head. We are actively implementing steps to generate new “masked” versions of these datasets that will be published under an open-access license. Please check back periodically for updates.