# Extract voxel values from reconstructed data.

**URL:** https://castor-project.discourse.group/t/extract-voxel-values-from-reconstructed-data/256
**Category:** General Discussions
**Created:** [March 9, 2022, 11:51am UTC](https://castor-project.discourse.group/t/extract-voxel-values-from-reconstructed-data/256 "2022-03-09T11:51:54Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![IITB](https://avatars.discourse-cdn.com/v4/letter/i/f4b2a3/32.png) [@IITB](https://castor-project.discourse.group/u/IITB)
#### Post date: [March 9, 2022, 11:51am UTC](https://castor-project.discourse.group/t/extract-voxel-values-from-reconstructed-data/256/1 "2022-03-09T11:51:54Z")

</div>

Hi Dev,

I am using SIMIND to generate list mode data for SPECT. Is there any way to extract voxel values from MLEM reconstructed data for CRC and SNR calculations? Thank You.

Regards,

Ritesh

PhD, Nuclear Medicine

IIT Bombay, Mumbai

---

<div class="post-metadata">

### Author: ![tmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/castor-project.discourse.group/tmerlin/32/216_2.png) [@tmerlin](https://castor-project.discourse.group/u/tmerlin)
#### Post date: [March 9, 2022, 8:43pm UTC](https://castor-project.discourse.group/t/extract-voxel-values-from-reconstructed-data/256/2 "2022-03-09T20:43:35Z")

</div>

Dear Ritesh,

CASToR image format is interfile. You can use various softwares to directly open and process them (e.g Amide, ImageJ with NucMed module, etc…). The img file can be opened in raw format.

You can also find here a python module to convert them to NIFTI format in the following link:  
[https://castor-project.org/links](https://castor-project.org/links)

Hope this helps,  
Thibaut