# Utilizing Slicer to Calculate 3D Length/ Distance as well as Surface Area on CT Images
**URL:** https://discourse.slicer.org/t/utilizing-slicer-to-calculate-3d-length-distance-as-well-as-surface-area-on-ct-images/25035
**Category:** Support
**Tags:** dicom
**Created:** [August 31, 2022, 10:50pm UTC](https://discourse.slicer.org/t/utilizing-slicer-to-calculate-3d-length-distance-as-well-as-surface-area-on-ct-images/25035 "2022-08-31T22:50:07Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@trent.schimmel](https://discourse.slicer.org/u/trent.schimmel)
#### Post date: [August 31, 2022, 10:50pm UTC](https://discourse.slicer.org/t/utilizing-slicer-to-calculate-3d-length-distance-as-well-as-surface-area-on-ct-images/25035/1 "2022-08-31T22:50:07Z")
Hello All,
I’m new to the Slicer community and having a little difficulty getting started on a project.
I am looking to calculate 3D length measurements as well as surface area measurements for a set of cranial CT scans (DICOM data). I was hoping to get the Slicer Community’s opinion on the best way to go about solving a problem like this.
I’ve done my best to look through the forums here online, but I believe I might be so new to the program that I’m a bit overwhelmed by all of the different tools/extensions.
I’m sure many of the power users here in the community could make quick work of a task like this, so I am very grateful for any assistance you may be able to offer.
Thanks in advance!
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### Author:  [@pieper](https://discourse.slicer.org/u/pieper)
#### Post date: [August 31, 2022, 11:35pm UTC](https://discourse.slicer.org/t/utilizing-slicer-to-calculate-3d-length-distance-as-well-as-surface-area-on-ct-images/25035/2 "2022-08-31T23:35:12Z")
It sounds like you can get what you need from either markups or segment statistics. If there’s anything not covered let us know.
[https://slicer.readthedocs.io/en/latest/user\_guide/modules/markups.html](https://slicer.readthedocs.io/en/latest/user_guide/modules/markups.html)
[https://slicer.readthedocs.io/en/latest/user\_guide/modules/segmentstatistics.html](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmentstatistics.html)
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### Author:  [@trent.schimmel](https://discourse.slicer.org/u/trent.schimmel)
#### Post date: [September 1, 2022, 2:13am UTC](https://discourse.slicer.org/t/utilizing-slicer-to-calculate-3d-length-distance-as-well-as-surface-area-on-ct-images/25035/3 "2022-09-01T02:13:22Z")
Steve,
Thanks so much for taking the time to respond to me and point me in the right direction. These look like great solutions!
Thanks again!