# About RTK use
**URL:** https://discourse.itk.org/t/about-rtk-use/5866
**Category:** Engineering
**Created:** [April 12, 2023, 11:19am UTC](https://discourse.itk.org/t/about-rtk-use/5866 "2023-04-12T11:19:49Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@ma1282029525](https://discourse.itk.org/u/ma1282029525)
#### Post date: [April 12, 2023, 11:19am UTC](https://discourse.itk.org/t/about-rtk-use/5866/1 "2023-04-12T11:19:49Z")
I would like to use the RTK library. I have downloaded some CBCT raw data from Varian. Which programs should I refer to to write my reconstruction “hello world”?
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [April 12, 2023, 12:32pm UTC](https://discourse.itk.org/t/about-rtk-use/5866/2 "2023-04-12T12:32:18Z")
Have you looked at [RTK’s resources](https://www.openrtk.org/RTK/resources/resources.html) page?
@simon.rit is there a more up-to-date list of resources?
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### Author:  [@simon.rit](https://discourse.itk.org/u/simon.rit)
#### Post date: [April 12, 2023, 2:39pm UTC](https://discourse.itk.org/t/about-rtk-use/5866/3 "2023-04-12T14:39:57Z")
The only resource missing in this old page is [RTK/INSTALLATION.md at master · SimonRit/RTK · GitHub](https://github.com/SimonRit/RTK/blob/master/INSTALLATION.md) which is what you might have been looking for. I have added it.
The “better documentation for RTK” project has been stalled unfortunately but I still hope to get back to it sooner or later…
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### Author:  [@ma1282029525](https://discourse.itk.org/u/ma1282029525)
#### Post date: [April 13, 2023, 12:53am UTC](https://discourse.itk.org/t/about-rtk-use/5866/4 "2023-04-13T00:53:53Z")
yes，but I donnot found the something help me
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### Author:  [@ma1282029525](https://discourse.itk.org/u/ma1282029525)
#### Post date: [April 13, 2023, 12:58am UTC](https://discourse.itk.org/t/about-rtk-use/5866/5 "2023-04-13T00:58:56Z")
I have install it ,but Idonnot konw how to use it,Idonnot konw how to write my reconstruction “hello world”.
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### Author:  [@simon.rit](https://discourse.itk.org/u/simon.rit)
#### Post date: [April 13, 2023, 4:30am UTC](https://discourse.itk.org/t/about-rtk-use/5866/6 "2023-04-13T04:30:54Z")
RTK is a module of ITK so you should look at the software guide to understand how one can compile an application using ITK (with the RTK module turned on):
[https://itk.org/ITKSoftwareGuide/html/Book1/ITKSoftwareGuide-Book1ch2.html](https://itk.org/ITKSoftwareGuide/html/Book1/ITKSoftwareGuide-Book1ch2.html)
You can start by compiling RTK’s FirstReconstruction
> **[RTK/examples/FirstReconstruction at master · SimonRit/RTK](https://github.com/SimonRit/RTK/tree/master/examples/FirstReconstruction)**
>
> master/examples/FirstReconstruction
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### Author:  [@ma1282029525](https://discourse.itk.org/u/ma1282029525)
#### Post date: [April 14, 2023, 12:59am UTC](https://discourse.itk.org/t/about-rtk-use/5866/7 "2023-04-14T00:59:04Z")
OK thank you