The Extensible Neuroimaging Archive Toolkit

XNAT is one of the two services provided by the TraIT BioMedical Image Archive (BMIA) for archiving imaging data. It is similar to the other service, NBIA.

XNAT enables data access via a website (manual upload and download), via the DICOM protocol and via an application programming interface (API), which makes it flexible. Furthermore, XNAT stores not only the images, but also image-derived information, such as annotations and processed versions of the images. It is therefore of interest for the more advanced, technically oriented researchers, and for large studies which require automated image analysis.

A short introduction on its use is given on

You can request a temporary training environment via the TraIT XNAT training page.

More documentation about XNAT can be found on:


Through the XNAT Gateway many viewers can interface with XNAT. These include popular viewers such as Osirix and 3D Slicer. For more information on these capabilities see


For the pricing model of XNAT, please read here.


To setup XNAT for your study, please follow the implementation steps.


XNAT frontend



Marcus DS, Olsen T, Ramaratnam M, Buckner RL: The Extensible Neuroimaging Archive Toolkit (XNAT): An informatics platform for managing, exploring, and sharing neuroimaging data. Neuroinformatics. 2007, 5 (1): 11-34
Klein S, Vast E, van Soest J, Dekker A, Koek M, Niessen W: XNAT imaging platform for BioMedBridges and CTMM TraIT. Journal of Clinical Bioinformatics. 2015, 5(Suppl 1): S18

About (in Dutch):
Dekker A, van Soest J, Klein S, Hoekstra R, Groot P, Vast E, Huguet J, Niessen WJ, Boiten J-W, van der Lugt A: BMIA – nationaal biomedisch imaging archief voor onderzoek. MemoRad. 2015, 2: 7-10