A multicenter network of Italian Neurological Research Hospital was recently started. Its first aim was to establish quality assessment protocols for future quantitative imaging studies. In this context, we report the outcome of the first 6 months of data collection using a dedicated phantom and processing pipeline. Scanner performance was assessed in terms of several stability indicators, grouped by manufacturer. The preliminary results represent the initial step towards a large-scale scanner stability assessment in clinical settings. We expected to gather regular data from all the sites in order to broaden data analysis and assess the multi-site temporal stability.