Before revision:  Examination of the determinant of the local metric tensor of the diffeomorphic mapping between each subject's ex-vivo MRI and resultant Nissl reconstruction allows an unprecedented local quantification of geometrical distortions resulting from the histological processing, showing a slight shrinkage, a median linear\pm  scale change of ~-1\% in going from the ex-vivo MRI to the tape-transfer generated histological image data\pm  .
After revision:  Examination of the determinant of the local metric tensor of the diffeomorphic mapping between each subject's ex-vivo MRI and resultant Nissl reconstruction allows an unprecedented local quantification of geometrical distortions resulting from the histological processing, showing a slight shrinkage, a median linear\pm 0.4\% per axis dimension. In contrast, the perfusion step, as assessed by mapping the in-vivo MRIs to the ex-vivo post fixation MRIs, shows a larger local scale change of ~-1\% in going from the ex-vivo MRI to the tape-transfer generated histological image data\pm .