# How to access realtime outside signs?

**URL:** <https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556>\
**Category:** Support\
**Created:** [July 29, 2022, 5:40am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556 "2022-07-29T05:40:01Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![whu](https://avatars.discourse-cdn.com/v4/letter/w/7ab992/32.png) [@whu](https://discourse.slicer.org/u/whu)\
**Post date:** [July 29, 2022, 5:40am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/1 "2022-07-29T05:40:02Z")

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Dear All,

```
   How to access a real-time external signal source? And displayed on the slice interface.

   I have a device that generates real-time coordinate information （using usb interface） and simulates navigation, hoping to correspond with the scanned CT data.

   Thanks for any suggestion.

```

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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:** [July 29, 2022, 3:27pm UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/2 "2022-07-29T15:27:05Z")

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One option is to integrate a driver for the device with PLUS [https://plustoolkit.github.io/](https://plustoolkit.github.io/)

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**Author:** ![whu](https://avatars.discourse-cdn.com/v4/letter/w/7ab992/32.png) [@whu](https://discourse.slicer.org/u/whu)\
**Post date:** [August 8, 2022, 7:17am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/3 "2022-08-08T07:17:30Z")

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Maybe this is the second topic using NDI device.  
the first as : [Navigation with NDI Aurora/Polaris tracker](https://discourse.slicer.org/t/navigation-with-ndi-aurora-polaris-tracker/905)  
Here I have connected the NDI trakSTAR using PLUS server + OpenIGTLinkIF. As image showed below.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/3/13c598d37fa71938fd0bdffbfd43cb4841dbb06a.png)  
Here my question is how to get or show the data from the IGT above ?  
thanks for any suggestion. 🙏

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [August 8, 2022, 8:20am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/4 "2022-08-08T08:20:07Z")

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I think you just need to open the client in Slicer and look at the transforms in the transforms module

Hope it helps

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<div class="post-metadata">

**Author:** ![whu](https://avatars.discourse-cdn.com/v4/letter/w/7ab992/32.png) [@whu](https://discourse.slicer.org/u/whu)\
**Post date:** [August 8, 2022, 8:40am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/5 "2022-08-08T08:40:20Z")

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can you give a simple UI picture ? I am not familiar with Slicer Application.

I tried the IGT Remote,

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/4/1471de6cd3c77d2546cfbd17a4037042211e451d.png)

the Slicer software crashed soon…

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<div class="post-metadata">

**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [August 8, 2022, 8:51am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/6 "2022-08-08T08:51:36Z")

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Please look at the docunentation:  
[https://www.slicer.org/wiki/Modules:OpenIGTLinkIF-Documentation-3.4](https://www.slicer.org/wiki/Modules:OpenIGTLinkIF-Documentation-3.4)

There are pictures there

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<div class="post-metadata">

**Author:** ![whu](https://avatars.discourse-cdn.com/v4/letter/w/7ab992/32.png) [@whu](https://discourse.slicer.org/u/whu)\
**Post date:** [August 8, 2022, 9:21am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/7 "2022-08-08T09:21:42Z")

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thanks very much. that version is little eary.

the new UI is as below:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/9/e9a01dc3aa44d848a64f58a3816282fbd1f511dc.png)

I still can not get the data（transform）.

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<div class="post-metadata">

**Author:** ![whu](https://avatars.discourse-cdn.com/v4/letter/w/7ab992/32.png) [@whu](https://discourse.slicer.org/u/whu)\
**Post date:** [August 11, 2022, 2:36am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/8 "2022-08-11T02:36:01Z")

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Still waiting for the answers,thanks

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<div class="post-metadata">

**Author:** ![whu](https://avatars.discourse-cdn.com/v4/letter/w/7ab992/32.png) [@whu](https://discourse.slicer.org/u/whu)\
**Post date:** [August 11, 2022, 7:20am UTC](https://discourse.slicer.org/t/how-to-access-realtime-outside-signs/24556/9 "2022-08-11T07:20:57Z")

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As your suggestion, using Slicer 3.6.  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/a/3a42f1122c10f0334f0122088c5370df28b0341b.png)  
No more choose as in the tutorials.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/7/1763f6f526f6ccc9f648f0c295ef264cb93132fd.png)  
so, the result,  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/d/5d5018b4b3b255a267cc0e0c1e42de2f53c672fa.png)  
The locator model shows up , but it dose not move around in the 3D view.  
…sorry…  
Still for answers.