[MINC-users] icbm_template stx sampling lattice definitions

[Vladimir S. FONOV]

Hello,

you can take a look at mni icbm 2009c - it actually uses different 
sampling then the old mni template, addressing the same problems.


On 2018-02-26 12:03 AM, Alex Zijdenbos wrote:
> Hello all,
> 
> I realized that the way the icbm_sampling lattices are defined, is not
> ideal for certain applications. Specifically, all the
> icbm_template_X.XXmm.mnc lattice definitions, all have the same start
> values, and I believe that the world coordinate origin always falls in the
> center of a voxel.
> 
> This gets a bit annoying when dealing with issues of symmetry. E.g., if you
> are looking to define L/R in these spaces, there is a x=0 plane of voxels
> for which it is not clear whether it belongs to L or R. By the same token,
> the bounding boxes of these spaces do not line up, and the voxel dimensions
> do not follow a regular series, where twice the resolution means twice the
> number of voxels. I am fairly sure that this inherent asymmetry actually
> affects the behaviour of some tools as well.
> 
> I've always thought it would be better to define the standard sampling
> lattice with respect to the world coordinate origin which would be *between*
> voxels; such that the lattices, albeit with different start values, would
> line up with respect to the origin.
> 
> I don't fully recall why we (Peter?) developed these lattice templates like
> this back then. Obviously I can define new lattices to suit my needs; but
> standardization has its benefits :-) Was curious if anybody had any
> thoughts about this.
> 


-- 
Best regards,

  Vladimir S. FONOV ~ vladimir.fonov <at> gmail.com