# Volume NRRD - Number of bits per pixel

**URL:** <https://discourse.slicer.org/t/volume-nrrd-number-of-bits-per-pixel/26112>\
**Category:** Support\
**Created:** [November 7, 2022, 1:44pm UTC](https://discourse.slicer.org/t/volume-nrrd-number-of-bits-per-pixel/26112 "2022-11-07T13:44:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lucas\_sd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lucas_sd/32/17087_2.png) [@lucas\_sd](https://discourse.slicer.org/u/lucas_sd)\
**Post date:** [November 7, 2022, 1:44pm UTC](https://discourse.slicer.org/t/volume-nrrd-number-of-bits-per-pixel/26112/1 "2022-11-07T13:44:34Z")

</div>

Hi everyone,

Im working for the first time with a .NRRD file, and in the section “volume information”, I can see the dimensions, etc. I put the header of the file at the end.

I need for my study know the number of bits per pixel of each image, so anyone know how to find this info?

Thanks, Lucas.

```auto
NRRD0004
# Complete NRRD file format specification at:
# http://teem.sourceforge.net/nrrd/format.html
type: int
dimension: 3
space: left-posterior-superior
sizes: 99 99 70
space directions: (-0.16734984152442534, ...)
kinds: domain domain domain
endian: little
encoding: gzip
space origin: (28.155725441615157,32.267068921044682,65.30072153815496)

```

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [November 7, 2022, 7:10pm UTC](https://discourse.slicer.org/t/volume-nrrd-number-of-bits-per-pixel/26112/2 "2022-11-07T19:10:03Z")

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> [@lucas\_sd](#):
>
> `type: int`

According to [nrrd file format specification](https://teem.sourceforge.net/nrrd/format.html#type), `int` means “signed 4-byte integer”.