# NRRD contour  to Dicom 

**URL:** <https://discourse.slicer.org/t/nrrd-contour-to-dicom/8936>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [October 29, 2019, 11:46am UTC](https://discourse.slicer.org/t/nrrd-contour-to-dicom/8936 "2019-10-29T11:46:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![John.ryan3](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/john.ryan3/32/5022_2.png) [@John.ryan3](https://discourse.slicer.org/u/John.ryan3)\
**Post date:** [October 29, 2019, 11:46am UTC](https://discourse.slicer.org/t/nrrd-contour-to-dicom/8936/1 "2019-10-29T11:46:57Z")

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Operating system: Windows 7 Enterprise  
Slicer version:4:11.0

I am not sure did my last question post correctly. It is my first time asking a question here, I douth it will be my last 🙂

I have a CT and Segmentation/Contour in .NRRD format  
I have the same CT in Dicom format.  
I want to get the segmentation/contour into Dicom format

When I load the CT and Segmentation/Contour in .NRRD format, the scale and orientation is off

I can fix the orientation by applying a flip transform

I am looking for a scale transform so that I can scale the CT + Segmentation/Contour by the same amount.

Appreciate any help. It looks like like the .nrrd files are scaled by a magnitude of 10 wrong. mm instead of cm.

Any help appreciated.  
John

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<div class="post-metadata">

**Author:** ![John.ryan3](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/john.ryan3/32/5022_2.png) [@John.ryan3](https://discourse.slicer.org/u/John.ryan3)\
**Post date:** [October 29, 2019, 11:48am UTC](https://discourse.slicer.org/t/nrrd-contour-to-dicom/8936/2 "2019-10-29T11:48:18Z")

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Operating system:Windows 7 Enterprise  
Slicer version:4.11.0  
Expected behavior:  
Actual behavior:

I have an original CT in Dicom format  
I have the same CT in .NRRD format  
I have a segmentation/contour in .NRRD format

I want the segmentation/contour in Dicom format with the same scale and orientation as original CT

When I load CT + segmentation/contour in NRRD format the scale and orientation are incorrect.

I can fix the orientation by applying a flip transformation

I don’t know how to create a scale transformation

Best wishes,  
John