One of my areas of practice is medical malpractice. I depose docs quite often, and try cases regarding complex medical issues that, at most, I may understand as a layperson.
In those cases, just as now, I do not profess to know about the medicine. Instead, I consult and present experts to offer their expert opinion about the medicine. I do not, however, rely on the opinions of a faceless blog writer.
And in this case, I choose to rely upon the opinions of the medical experts who have examined Terri, as well as the reports summarizing those opinions.
I am unqualified to offer expert testimony on diagnostic images, I am eminently qualified to offer an opinion on same. You are neither.