I mean that's largely an unanswered question. Aparantly there's currently a semi-automated algorithm that works but needs a LOT of supervision, making it much too expensive to use to "unroll" all the rolls.

As to how you would even go about using the slices, keep in mind that a stack of slices gives you a volumetric model. The scan basically provides a high resolution volumetric model of the density of the scrolls. You'd need to somehow use this density information to trace a path along the curl of the scroll. This then gets you a density map of the scroll as if it was unrolled. Then the next trick is to somehow turn that into legible text.

The details of how to do the above are currently unknown. There's a prize for whoever figures it out.