My program create_sphere_image in the gPPI toolbox (www.nitrc.org/projects/gppi) will create spheres in any image/space and diameter.

Best Regards, Donald McLaren
=================
D.G. McLaren, Ph.D.
Research Fellow, Department of Neurology, Massachusetts General Hospital and
Harvard Medical School
Postdoctoral Research Fellow, GRECC, Bedford VA
Website: http://www.martinos.org/~mclaren
Office: (773) 406-2464
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On Mon, Nov 3, 2014 at 5:26 AM, Emiliano Z. <[log in to unmask]> wrote:
Dear Omar,

Mango from the brainmap.org/tools website is a very practical 3D visualization software,
which allows you to insert coordinate-dots on any template you like and creating fancy blobs, by navigating in MNI/Talairach space. You can also produce you own NIFTIs with you 3D dots therein, to use as overlapping layer.

Definitely better to me, than the old "draw" option in MRIcroN.

Sincerely,

Emiliano