CATI has been managing the neuroimaging part of clinical research projects for more than 15 years, thus collaborating with the largest academic teams in imaging in France linked with neurology and psychiatry. In this context, CATI now gathers numerous nuclear medicine departments and MRI centers, both clinical (neuro)radiology departments and MRI research centers. In recent years, CATI has been managing the neuroimaging part of European clinical research projects, thus opening the acquisition network to European and even extra European centers for one project. Today, the CATI network gathers more than one hundred French centers, and more than 30 European centers and a few extra European centers. Details are given below.