save matrix into .nii or .img file

3 次查看（过去 30 天）
Priyanka Gorijala
编辑： Omar Salah 2020-7-7
Hello,
I have .nii file which I filtered basing on distance criteria; now I have a list of filtered coordinates
like this : file =
MNI_x MNI_y MNI_z Z_value
50 -4 -46 4.1706
50 -2 -46 4.1706
50 0 -46 4.1706
54 -6 -44 4.1706
52 -6 -44 4.1706
50 -6 -44 4.1706
54 -4 -44 4.1706
52 -4 -44 4.1706
can anyone please help me to find a way to save those filtered coordinates in to .img or .nii file.
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Rik
Rik 2020-7-7
Have you read the documentation for those functions? Did they contain any examples? Were you able to reproduce those?
Priyanka Gorijala
Priyanka Gorijala 2020-7-7
I read, but I am not able to reproduce those.
So I am trying for something which converts matrix to .img or .nii file

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回答（1 个）

Omar Salah
Omar Salah 2020-7-7
编辑：Omar Salah 2020-7-7
Marsbar toolbox have ready made functions for that. http://marsbar.sourceforge.net/ you would usually construct a roi first with the coordinates using the object constructor called "maroi_pointlist" then save them with another function.
Here is what I use in my code:
img_mat = maroi_pointlist(struct('XYZ',<COORDINATES>,'vals',<VALUES>,'roithresh',0,'binarize',0,'mat',<Inversion matrix (I got it from SPM)>,'descrip','', 'label', <Label> ),'vox');
img_roi=saveroi(img_mat, <IMAGENAME>);
save_as_image(img_roi, <IMAGENAME>);

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