Hi @Luca, a few thoughts!
- Would suggest taking a look at the webinar/tool that @glatard developed: Webinar - Conducting Novel and Replicative Analyses of PPMI Imaging Data with the LivingPark Tool
- Spoke with a colleague on our imaging portfolio who suggested that refer to the curated data cut rather than attempting to pull down all the files. This will enable you to have the latest data from which you can then stratify to meet the needs of your analysis. It only includes DATSCAN collection dates, but these should be a good proxy for other imaging data collected.
Hope this helps, let us know if you still have questions! 