No one said that officially, they said almost gone. This photo shows some greymatter remaining, with holes in between which renders it likely unusable. That seems to jive with the physical tests performed.
This may also be a early pic before they noticed further degradation.
This is really bad as it is. No one could function at any level with damages as indicated in this, and this is the best pic that this Dr. could find to support his faulty conclusions, as the courts found as well. This neurologists, (Hamesfhar) made all kinds of dubious claims.
It is hard to tell exactly when that scan was taken. the area of the scan with the date stamp is blacked out. You'll see a lighter shaded black box on the lower left hand corner. That's where the date stamp is.