A kit-of-parts for visualizing by a magnetic resonance imaging (MRI) technique including a functional magnetic resonance imaging (fMRI) technique, regions of a central nervous system of a patient having an implanted active implantable medical device (AIMD) is provided. The kit-of-parts is provided and includes:



the AIMD, which can be used exposed to the electromagnetic conditions for MR-images acquisition,
an external processing unit for controlling the AIMD,
an optical communication lead for establishing a two-way optical communication between the AIMD and
an external communication unit which is controlled by the external processing unit.




A patient having an implanted AIMD can be treated in a conventional MR-device for imaging, e.g., a brain region. The other elements of the kit-of-parts allow controlling the functions of the AIMD and following any effects of a stimulation on the brain region thus imaged.