# How to install the RegistrationQA extension

**URL:** <https://discourse.slicer.org/t/how-to-install-the-registrationqa-extension/12552>\
**Category:** Support\
**Created:** [July 15, 2020, 12:07pm UTC](https://discourse.slicer.org/t/how-to-install-the-registrationqa-extension/12552 "2020-07-15T12:07:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![toyama](https://avatars.discourse-cdn.com/v4/letter/t/82dd89/32.png) [@toyama](https://discourse.slicer.org/u/toyama)\
**Post date:** [July 15, 2020, 12:07pm UTC](https://discourse.slicer.org/t/how-to-install-the-registrationqa-extension/12552/1 "2020-07-15T12:07:02Z")

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I installed RegistrationQA to calculate ICE, Jacobian, and I want to. But there are a few things I don’t understand.

 ![3DSlicer1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/2/c26d5b912e6884fcdf586f9bcdfcd0b798d64812.png)  
↑I did the operation of the red line in the work of II.2, but this is not enough to just download the file. Isn’t it?  
 ![3DSlicer2](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/2/82d9f6fc06397a5d619aa263058a055205a083f7.png)  
↑In II.3, I’m going to use cMake apart from 3DSlicer, but cMake What should I write in the sections “Where is the source code?” and “Where to build the binaries” I don’t know.

I am having trouble resolving these issues. Please reply to me.