Plastic transformation of PET images.
A theory and technique are presented that allow nonlinear resampling of positron emission tomography data to remove nonlinear differences in brain shape. The resampling is determined empirically by a function relating the observed image and a desired template. The validity, reliability, and precision of the plastic transformation are compared with linear rescaling alone, within, and between subjects.
Friston
K J
KJ
MRC Cyclotron Unit, Hammersmith Hospital, London, U.K.
Frith
C D
CD
Liddle
P F
PF
Frackowiak
R S
RS
D001921:Brain / Q000098:blood supply / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D012039:Regional Blood Flow; D013238:Stereotaxic Techniques; D014055:Tomography, Emission-Computed / Q000379:methods*