# From ADC/FA back to DWI

**URL:** <https://discourse.slicer.org/t/from-adc-fa-back-to-dwi/464>\
**Category:** Support\
**Tags:** diffusion\
**Created:** [June 9, 2017, 11:15am UTC](https://discourse.slicer.org/t/from-adc-fa-back-to-dwi/464 "2017-06-09T11:15:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Eduardo](https://avatars.discourse-cdn.com/v4/letter/e/6a8cbe/32.png) [@Eduardo](https://discourse.slicer.org/u/Eduardo)\
**Post date:** [June 9, 2017, 11:15am UTC](https://discourse.slicer.org/t/from-adc-fa-back-to-dwi/464/1 "2017-06-09T11:15:20Z")

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Hi,

I received some FA and ADC images in DICOM to evaluate, but I needed the original DWI images to workup, according to your DWI tutorials. Since they were lost by the original owner, and I don´t have anymore samples to redo the Experiment, would there be an way to generate back the original DWI Images based on the FA and/or ADC DICOM?  
Thanks for your help.

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**Author:** ![hjmjohnson](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hjmjohnson/32/173_2.png) [@hjmjohnson](https://discourse.slicer.org/u/hjmjohnson)\
**Post date:** [June 9, 2017, 11:47am UTC](https://discourse.slicer.org/t/from-adc-fa-back-to-dwi/464/2 "2017-06-09T11:47:10Z")

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What you ask for is not possible.

It’s like asking for generating the original data values when only the mean and standard deviation of a numerical data set was shared with you.

FA and ADC are rotationally invariant scalers that are summary scores (statistics) of the much larger original data.

Hans

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**Author:** ![Eduardo](https://avatars.discourse-cdn.com/v4/letter/e/6a8cbe/32.png) [@Eduardo](https://discourse.slicer.org/u/Eduardo)\
**Post date:** [June 9, 2017, 2:23pm UTC](https://discourse.slicer.org/t/from-adc-fa-back-to-dwi/464/3 "2017-06-09T14:23:23Z")

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Sorry to hear that, but thank you very much for the attention and help.