# Each voxel (3-dimmensional pixel) in the image has a length, width, and height of 1mm. What will be the volume in cm^3?

**URL:** https://discourse.itk.org/t/each-voxel-3-dimmensional-pixel-in-the-image-has-a-length-width-and-height-of-1mm-what-will-be-the-volume-in-cm-3/5438
**Category:** Beginner Questions
**Tags:** dicom
**Created:** [October 23, 2022, 10:13am UTC](https://discourse.itk.org/t/each-voxel-3-dimmensional-pixel-in-the-image-has-a-length-width-and-height-of-1mm-what-will-be-the-volume-in-cm-3/5438 "2022-10-23T10:13:05Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![dharmannasdmit](https://discourse.itk.org/letter_avatar_proxy/v4/letter/d/439d5e/32.png) [@dharmannasdmit](https://discourse.itk.org/u/dharmannasdmit)
#### Post date: [October 23, 2022, 10:13am UTC](https://discourse.itk.org/t/each-voxel-3-dimmensional-pixel-in-the-image-has-a-length-width-and-height-of-1mm-what-will-be-the-volume-in-cm-3/5438/1 "2022-10-23T10:13:06Z")

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dimension of image is 256X256X192  
[T2\_76.IMA](https://discourse.itk.org/uploads/short-url/nhaGoarcHd3nnMyY8hQeyolMClD.IMA) (130.1 KB)  
Each voxel (3-dimmensional pixel) in this image has a length, width, and height of 1mm. Calculate brain volume from brainMask. What is the volume of this brain in cm^3?

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### Author: ![zivy](https://discourse.itk.org/user_avatar/discourse.itk.org/zivy/32/1726_2.png) [@zivy](https://discourse.itk.org/u/zivy)
#### Post date: [October 23, 2022, 11:51pm UTC](https://discourse.itk.org/t/each-voxel-3-dimmensional-pixel-in-the-image-has-a-length-width-and-height-of-1mm-what-will-be-the-volume-in-cm-3/5438/2 "2022-10-23T23:51:57Z")

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Hello @dharmannasdmit,

As the intrinsic units from DICOM are mm, the volume computed via ITK filters will be in mm^3. Translating that value to cm^3 is done by dividing it by 1000.