# Tips and Tricks for creating VOI from ADC maps

**URL:** <https://discourse.slicer.org/t/tips-and-tricks-for-creating-voi-from-adc-maps/2004>\
**Category:** Support\
**Created:** [February 1, 2018, 9:18pm UTC](https://discourse.slicer.org/t/tips-and-tricks-for-creating-voi-from-adc-maps/2004 "2018-02-01T21:18:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![RandyGollub](https://avatars.discourse-cdn.com/v4/letter/r/bb73d2/32.png) [@RandyGollub](https://discourse.slicer.org/u/RandyGollub)\
**Post date:** [February 1, 2018, 9:18pm UTC](https://discourse.slicer.org/t/tips-and-tricks-for-creating-voi-from-adc-maps/2004/1 "2018-02-01T21:18:17Z")

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Dear wonderful Slicer community-

Can anyone give me some advise to speed my learning curve. I have a 80 ADC maps from babies and want to manually create a new volume that contains my drawn annotation of viably abnormal voxels.

Step 1: Open the ADC volume in Slicer  
Step 2: ???

Many thanks!  
Randy

Operating system: MacBook Pro running Sierra  
Slicer version: 4.8.1  
Expected behavior: unsure what to expect but guess it will be awesome  
Actual behavior: TSTT- still downloading

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [February 1, 2018, 11:08pm UTC](https://discourse.slicer.org/t/tips-and-tricks-for-creating-voi-from-adc-maps/2004/2 "2018-02-01T23:08:16Z")

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Hey, welcome to the forum @RandyGollub ! (For those who don’t know her personally, Randy is a real neuroscience pro and a friend so I’ll also help her get started but advice from the forum is more than welcome).

To answer your question:  
Step 1. drag and drop file on slicer to load  
Step 2. open segment editor, add a segment and start drawing  
Step 3. save as a nii file

(There are for sure some non-obvious substeps but that’s the basic idea).

Maybe start by watching this video:  
[https://www.slicer.org/wiki/Documentation/Nightly/Training#Segmentation\_for\_3D\_printing](https://www.slicer.org/wiki/Documentation/Nightly/Training#Segmentation_for_3D_printing)

In terms of tutorials, Sonia’s “General Introduction” slides should be good for reference:  
[https://www.slicer.org/wiki/Documentation/4.8/Training#General\_Introduction](https://www.slicer.org/wiki/Documentation/4.8/Training#General_Introduction)

Also you’ll want to look through the Segment Editor documentation:  
[http://slicer.readthedocs.io/en/latest/user\_guide/module\_segmenteditor.html](http://slicer.readthedocs.io/en/latest/user_guide/module_segmenteditor.html)