SPM assumes that the image orientation is what the data format says it
is. If the data were to be correctly converted to NIfTI format, then
SPM should handle them perfectly fine. With the older ANALYZE format,
left-right orientations are not specified in the headers, so SPM needs
to be explicitly told what the orientations are.
On Tue, 2010-05-25 at 17:05 +0100, Stephen Paisey wrote:
> Dear Developers and users,
> We have imaged rats with a brain lesion on the right hand side on a Bruker scanner using Paravision 5.0. I have then used analyze 9.0 to convert the raw bruker files into and img/hdr file pair. The images in analyze 9.0 are displayed the correct way around but when I load them in spm5 (i am using this version for its compatibility with the spmmouse extension) i get an image which has been left right inverted i.e. the lesion is now on the left side of the brain. I can get around this by flipping the image the wrong way around before i read it into spm but this is clearly a bug which could lead to totally wrong experimental results. It is lucky i had non symmetrical rats otherwise i probably wouldn't have spotted the error.
> Best Regards
John Ashburner <[log in to unmask]>