I have a NIfTI image which orientation is RPI. When displaying the image details with mrinfo -norealign, the strides given are [1 2 3], however I thought they would be [1,-2,-3] for RPI orientation.
Thanks for your help with this.
Welcome to the MRtrix forum!
To answer your question: this is exactly as expected. NIfTI assumes fixed strides of 1,2,3,… and using the
-norealign option instructs
mrinfo to leave that information exactly as it was on file. It’s what happens when you don’t use the
-norealign option that can get confusing… There’s quite a detailed explanation of these issues in this post, hopefully this will answer your question.
Thanks a lot for your reply and link towards a similar post. I’ve understood now.