AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

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Daniel Glen
September 30, 2005 08:07AM
Check if any of the eigenvalues are negative at these voxels. If there are negative voxels, then you probably used the linear method for computing the tensor. If you did use the non-linear method and you still get negative eigenvalues, please upload the original DWI data to me, and I can take a look. If there are no negative eigenvalues, then you can do a 3dcalc command to calculate the FA from those sub-bricks.
Subject Author Posted

3dDWItoDT

Giovanni Giulietti September 29, 2005 01:12PM

Re: 3dDWItoDT

Wolfgang September 29, 2005 01:52PM

Re: 3dDWItoDT

Daniel Glen September 29, 2005 02:24PM

Re: 3dDWItoDT

Giovanni Giulietti September 30, 2005 05:01AM

Re: 3dDWItoDT

Daniel Glen September 30, 2005 08:07AM

Re: 3dDWItoDT

Giovanni Giulietti September 30, 2005 08:59AM

Re: 3dDWItoDT

Daniel Glen September 30, 2005 01:37PM

Re: 3dDWItoDT

Giovanni Giulietti October 03, 2005 06:44AM

Re: 3dDWItoDT

Daniel Glen October 04, 2005 05:31PM