# Radiomics, image input volume

**URL:** <https://discourse.slicer.org/t/radiomics-image-input-volume/13329>\
**Category:** Radiomics\
**Created:** [September 3, 2020, 8:08pm UTC](https://discourse.slicer.org/t/radiomics-image-input-volume/13329 "2020-09-03T20:08:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![KLH](https://avatars.discourse-cdn.com/v4/letter/k/f07891/32.png) [@KLH](https://discourse.slicer.org/u/KLH)\
**Post date:** [September 3, 2020, 8:08pm UTC](https://discourse.slicer.org/t/radiomics-image-input-volume/13329/1 "2020-09-03T20:08:03Z")

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Operating system: Windows 10  
Slicer version:4.10.2  
Expected behavior: Able to choose a different image input volume  
Actual behavior:Can only select one image input volume (first one loaded maybe)

Im new to slicer and radiomics, so apologies if its a simple question. I’m not sure if this is a bug or I just don’t understand, but on the dropdown list of “image input volume” it seems like I should be able to select any volume that I have loaded into the project. (in my case I am using grayscale microscopy .jpeg) and I’d like to compare different image processes to one another. Should I be able to select a different volume in the image input list? There is only my original volume selection available in the dropdown.

My goal is if I make similar (or identical) thresholded segmentations for each version (HE, CLAHE, W/L, Original), I can compare using some radiomics features. I know this is not how radiomics is normally used, but Im hoping to obtain quantitative comparison of histogram mapping methods.

I suppose I can make a whole new project for each process if I can’t select different image versions before running the tables.  
Any help much appreciated.  
KH

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [September 3, 2020, 9:46pm UTC](https://discourse.slicer.org/t/radiomics-image-input-volume/13329/2 "2020-09-03T21:46:17Z")

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Maybe you need to provide a scalar volume as input. You can convert vector (RGB) volume to scalar volume using “Vector to Scalar Volume” module.

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**Author:** ![ZHENZC](https://avatars.discourse-cdn.com/v4/letter/z/eb8c5e/32.png) [@ZHENZC](https://discourse.slicer.org/u/ZHENZC)\
**Post date:** [April 14, 2021, 11:32am UTC](https://discourse.slicer.org/t/radiomics-image-input-volume/13329/5 "2021-04-14T11:32:40Z")

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Thank to you suggeston, we just solved the obstacle on which we have worked for a month.  
Best wishes