# Diffusion Tensor Estimation is not working with my data

**URL:** <https://discourse.slicer.org/t/diffusion-tensor-estimation-is-not-working-with-my-data/2588>\
**Category:** Support\
**Created:** [April 14, 2018, 1:27pm UTC](https://discourse.slicer.org/t/diffusion-tensor-estimation-is-not-working-with-my-data/2588 "2018-04-14T13:27:17Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [April 16, 2018, 4:42pm UTC](https://discourse.slicer.org/t/diffusion-tensor-estimation-is-not-working-with-my-data/2588/5 "2018-04-16T16:42:53Z")

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Usually this error happens when the directory you are loading with DWIConvert contains DICOMs from different acquisitions. The DICOM needs to be sorted into directories by series.

You could try using [DICOM browser module](https://www.slicer.org/wiki/Documentation/Nightly/Modules/DICOM). Because of some issues with tag identification, please select _only_ **DICOMDiffusionVolumePlugin** :

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/1/a17ab466d81cf7229fc20129c5904cb6aecea0f9.png)

Then click **Examine** ; then try to **Load** your diffusion series. The DICOM browser should do the sorting (it copies the files into a temporary directory). It should recognize Siemens data using the standard tags, but may not recognize data from some scanners.

If that doesn’t work, you could try sorting with the tool mentioned here:

> [@Is there any method to convert volume to DiffusionTensorvolume?](https://discourse.slicer.org/t/is-there-any-method-to-convert-volume-to-diffusiontensorvolume/2553/6):
>
> I think the most likely issue is still mis-sorting: DWIConvert requires that all files to be converted are from the same series (or at least identical acquisition parameters) and alone in one folder. You could try this script to do the sorting first: That said, if the data is from a Prisma or newer scanner, then I’m not sure if DWIConvert fully supports it yet. Please let us know the following tag information: (0008,0070) (0008,1090) (0018,1020) e.g.: (0008,0070) LO [SIEMENS] …

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_[View the full topic](https://discourse.slicer.org/t/diffusion-tensor-estimation-is-not-working-with-my-data/2588)._