Andmetöötlus funktsionaalse seotuse hindamiseks puhkeoleku fMRT-s
amount of shift in voxel position may vary across the
image.
The shift in voxel position can be described
mathematically as:
x'=Ax+b
Spatial Normalization
· Refers to transforming images so that the anatomy shown for all people is the
same shape and size.
· The goal is to have any selected voxel contain the MR signal from the same
anatomical location in every person.
· Talairach coordinates.
· MNI (Montreal Neurological Institute) coordinates.
· Methods:
ANIMAL (automatic nonlinear image matching and anatomical labeling),
· Iterative approach based on an initial course alignment of 3D image
data with a reference data set, by means of 3 rotation, 3 translation and
3 scaling parameters.
12-parameter affine transformation.
· The transformation needed to map one 3D image data set to another.
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