I understand that when warping from orig to tlrc, 30 BLT (basic linear transformations) are calculated and used. In what way do these BLT's differ from each other? Is there a different warp for each of 30 regions inferior to superior? Would it be at all valid to use only the first BLT to warp the whole brain since each BLT is similar in value? Or when using these rotation matrices should I make sure to use all 30?
Thank you,
Alex Joyner