Diego, can you ask the radiologist about why that particular way of looking at the series is preferred? Is it because she wants to quickly see all slices where tumor is contoured for efficiency purposes, or she wants to see all of the slices to evaluate agreement/inconsistencies between the slices? It would be interesting to understand the reasons.
I also work with radiologists in prostate cancer MRI applications, and they never brought it up to have this feature. In my experience, scrolling through the series with the segmentation overlay is what they need.