Stretching the brain to fit: a step towards automatically segmenting, orienting and registering SPECT brain images

A procedure has been developed to automatically orientate, register and fit single photon emission computer tomographic images of the brain. The reconstructed transaxial slices are centred and aligned using a guided, iterative correlation technique, correcting for translation and `yaw´. Then the resulting sagittal views are `pitch´ corrected using a regression method. The coronal slices produced subsequently are `roll´ corrected, again using the guided, iterative correlation method. Finally, the resulting transaxial slices are delineated using an active shape model and then stretched onto a pseudo standard model