This e-mail won't be quite as easy as the last. Sorry. Because I've also been
having trouble with the orientation of our fMRI images, I've been following
these e-mails (specifically about image orientation). Can you please tell me
what LPI and RPI are?
Thank you,
Charisma
Quoting John Ashburner <[log in to unmask]>:
> > after John's emails I'd like to be sure about a couple of things.
> > 1- What matters for flipping is the handness of storage, is that correct?
>
> Yes.
>
> > 2- Data stored in Right hand system needs not to be flipped, while Left
> > hand stored data need to be flipped.?
>
> Yes.
>
> > 3- To tell the handnees of the actual
> > data, John suggested to look at voxel (1,1,1) for axial images. Now if
> > voxel (1,1,1) is LPI my data are right hand and need not to be flipped in x
> > dimension. is that correct?
>
> Yes.
>
> > If voxel (1,1,1) is RPI data need to be flipped
> > in x dimension. is that correct?
>
> Yes.
>
> > thanks for any help
>
> That was easy.
>
> best regards,
> -John
>
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