Hi,
If you want to be precise and you have coordinates to align then
you can also use pointflirt which is designed for just this.
All the best,
Mark
On 4 May 2009, at 06:23, Matt Glasser wrote:
> Use Nudge.
>
> Peace,
>
> Matt.
>
> -----Original Message-----
> From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On
> Behalf
> Of Tommy Sobel
> Sent: Monday, May 04, 2009 12:01 AM
> To: [log in to unmask]
> Subject: [FSL] Manual AC-PC Alignment
>
> Is there a way to AC-PC align a 3D scan manually like you can in
> SPM2, AFNI
> & MIPAV? In
> these programs the user places 3 (or 5) points at specific locations
> (at the
> AC, PC and a
> midsaggital point) and the software does the rest to do the rotating
> and
> translating. I am
> aware of FLIRT's ability to overlay a scan onto the MNI atlas with 6
> dof,
> however many
> times the anterior commissures still do not match up between the
> scan and
> the atlas, as
> well as from scan to scan.
>
> Also, in order for it to be true AC-PC (aka Talairach) alignment, the
> anterior commissure
> must be set to point (0,0,0), and I can't imagine the FLIRT method
> does that
> (since you
> never manually mark the AC as a specific point.) Along with that,
> the line
> going from the AC
> to PC must be along the y-axis, and the z-axis must run midsaggitally.
>
> Thank you!
>
> Tommy
> UCLA Neuropsychiatric Institute
>
|