It is a minimal requirement, but the paper explains why it hasn't yet been done. In addition to the logistical issues of getting access to the scrolls, technological issues also exist. To simplify to the point of being wildly inaccurate, "it don't scan gud and we need more resolution". As someone with no experience in this area, I'd imagine it will upend a small portion of the research community and spawn some fundamental research into improved imaging sensors.
I'd encourage you to read to the end of the paper. It is quite accessible and captivating.
But why? Doesn't that seem like a minimal requirement to prove the technique worked? Did you find any text or not?