# T2 Map Multi-volume related questions

**URL:** <https://discourse.slicer.org/t/t2-map-multi-volume-related-questions/2076>\
**Category:** Development\
**Created:** [February 13, 2018, 10:57am UTC](https://discourse.slicer.org/t/t2-map-multi-volume-related-questions/2076 "2018-02-13T10:57:07Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![brhoom](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/brhoom/32/1228_2.png) [@brhoom](https://discourse.slicer.org/u/brhoom)\
**Post date:** [February 14, 2018, 7:36am UTC](https://discourse.slicer.org/t/t2-map-multi-volume-related-questions/2076/5 "2018-02-14T07:36:40Z")

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Thanks for the reply and the info.  
I didn’t know that there is already such an extension, why it does not appear in Slicer’s extension manager?

I was planning to use Scipy to do the fitting so at the end I have only one file python code to make a simple portable Slicer plugin.  
I will check the links today.

Still (for the sake of knowledge), I don’t know what cause the issues in the code above. If I change this line:

```
vma [i,j,k] = vc[0]  

```

To be something like

```
vma [i,j,k] = 0 

```

or

```
vma [i,j,k] = 4000

```

In both situations, Slicer does not crash when I load the resulted volume in “Volume” module. It crashes only when I try to assign voxel value from the multi volume. I printed the value of vc[0] and it looks like a single scalar value (not a vector).

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