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Hi SMPers, I have a question about conversion of some PET data to NIFTI to use in SPM. I have imaged pigeon's brain by using small animal Siemens MicroPET R4. Pigeons were placed on the bed in supine position. The format of the PET data is Concorde and based on the way pigeon's were placed pigeon (supine position), the right side of image is left brain. so, the PET images in Concorde format are in radiological convention. I converted the images to NIFTI format by using Amide software to use them in SPM but the problem is that when I display the NIFTI format of the images in Amide software, the orientation is not like the output of Concorde! it seems that the right and up side of the image in Concorde is on the left and bottom side of the image in NIFTI format!!!Also, when I display the NIFTI images in SPM is again in another orientation that I can not understand what happen! MRIcro does not supported the Concorde format.I don't know how to deal with this problem. I was wondering if you tell me what should I do to have the orientation of NIFTI like Concorde format that I can be able to distinguish left and right brain hemisphere? Thanks, Shiva