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Dear all, I am hand-drawing region of interests using MRIcron. My ROI is the superior colliculus. We are interested in looking at its response to looming stimuli which is greatest in the superficial layer of the SC. Given its small size, I wish to use MRIcron with our radiology computers toprovide the best magnification and image resolution. 1. Is MRIcron the best software to use for hand-drawing ROIin small brain structures such as the SC?2. How do I achieve the best magnification with MRIcron?3. Are the T1 anatomical images the best sequence to useto draw ROI? We do not have proton density images. Many thanks in advance, Best wishes, Eavan Mc GovernNeurology Research Fellow, Dublin