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Xiaoying Tang

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10 Jul 2012 Tools for NIfTI and ANALYZE image Load, save, make, reslice, view (and edit) both NIfTI and ANALYZE data on any platform Author: Jimmy Shen

Hello,
This package works very well for my research. Thanks first. But now I have a problem with vector image. I want to change the pixel value of a xyz vector image by taking its absolute values. I first used: nii = load_nii(1_xyz.img), if I use view_nii(nii), I found everything correctly. Moving the crosshair to 139,63,91, I can read the value is (-0.1784,0.8963,0.3663), which is correct. But if I used: a = nii.img; a(139,63,91,1:3), it will display values as 0.35555,0.9434,0.6535. It seems that the value of a is always positive. I tried to use nii = load_untouch_nii(1_xyz.img); a = nii.img; It has the same positive value.
Do you have any suggestion about this inconsistency between the value of nii.img and that displayed by view_nii(nii)?
Thanks a lot.

10 Jul 2012 Tools for NIfTI and ANALYZE image Load, save, make, reslice, view (and edit) both NIfTI and ANALYZE data on any platform Author: Jimmy Shen

Hello,

This package works very well for my research. Thanks first. But now I have a problem with vector image. I want to change the pixel value of a xyz vector image by taking its absolute values. I first used: nii = load_nii(1_xyz.img), if I use view_nii(nii), I found everything correctly. Moving the crosshair to 139,63,91, I can read the value is (-0.1784,0.8963,0.3663), which is correct. But if I used: a = nii.img; a(139,63,91,1:3), it will display values as 0.35555,0.9434,0.6535. It seems that the value of a is always positive. I tried to use nii = load_untouch_nii(1_xyz.img); a = nii.img; It has the same positive value.

Do you have any suggestion about this inconsistency between the value of nii.img and that displayed by view_nii(nii)?

Thanks a lot.

25 Dec 2011 discrim This is version 0.3 of the Discriminant Analysis Toolbox with major bug fixes. Author: Michael Kiefte

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02 Aug 2010 Tools for NIfTI and ANALYZE image Load, save, make, reslice, view (and edit) both NIfTI and ANALYZE data on any platform Author: Jimmy Shen

Hi Jimmy,

I have some problem. My goal is to change the negative value and the NAN value in an image into 0 and then save it as .nii. I used the load_nii program and then changed the value into 0, and then used the save_nii. Everything seemed to be fine. But I finally found that the FOV of the image changed a little from: Field of VIew-Width: 204; Field of View-Height: 256; Slice Thickness:1 to Field of View-WIdth:203.992; Field of View-Height:255.909;Slice Thickness: 0.99968. But the image dimensions remained the same. Do you understand what I mean? I mean the voxel size changed. Could you please have a look at this problem? It is very strange.

Thanks a lot.
Xiaoying

31 Jul 2010 Tools for NIfTI and ANALYZE image Load, save, make, reslice, view (and edit) both NIfTI and ANALYZE data on any platform Author: Jimmy Shen

Hi Jimmy,

I have some problem. My goal is to change the negative value and the NAN value in an image into 0 and then save it as .nii. I used the load_nii program and then changed the value into 0, and then used the save_nii. Everything seemed to be fine. But I finally found that the FOV of the image changed a little from: Field of VIew-Width: 204; Field of View-Height: 256; Slice Thickness:1 to Field of View-WIdth:203.992; Field of View-Height:255.909;Slice Thickness: 0.99968. But the image dimensions remained the same. Do you understand what I mean? I mean the voxel size changed. Could you please have a look at this problem? It is very strange.

Thanks a lot.
Xiaoying

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