Dear SPMer: I want to use "slice timing" for correcting the acquisition time between slices. But i do not know the exact slice order, what i have is the 3d-dicom file. i converted it to jpg file in this attachment. Can i identify it is an ascending order (first slice=bottom) from that? Thank you very much! --------------------------------------------------- Qilin Lu Institute of Neuroinformatics Department of Physics Dalian University of Technology 2 Ling Gong Rd, Dalian 116023, China