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NIRALUser / DTIProcessToolkit

DTIProcess is a DTI processing and analysis toolkit developed in UNC and University of Utah
http://www.nitrc.org/projects/dtiprocess
Apache License 2.0
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dtiestim 1.2.0 and option to shift negative eigenvalues not working for IDWI #3

Closed rachelsteiner closed 9 years ago

rachelsteiner commented 9 years ago

Hi NIRALUser, dtiestim 1.2.0 's new option to shift negative eigenvalues works well for B0 and DTI images but it is not working for IDWI (not correcting the tensors). Neither DWIToDTIEstimation in 3DSlicer nor dtiestim 1.2.0's shiftNeg feature provides for a corrected IDWI image. Is there an alternative solution to creating the IDWI image with correct information?

Thanks, rachel

fbudin69500 commented 9 years ago

Hello Rachel, IDWI anb B0 images do not contain tensors. Therefore the option provided by dtiestim to shift the negative eigenvalues is unable to correct your images. If you mean that your output IDWI images contain NaN value, I suggest you look into ImageMath (which is part of https://github.com/NIRALUser/niral_utilities) which provides an option ("-NaNCor") to remove NaN values. Hope that helps,

Francois