# Localizing a Fiducial Marker in a DICOM Volume

**URL:** <https://discourse.slicer.org/t/localizing-a-fiducial-marker-in-a-dicom-volume/37129>\
**Category:** Support\
**Created:** [July 1, 2024, 7:25pm UTC](https://discourse.slicer.org/t/localizing-a-fiducial-marker-in-a-dicom-volume/37129 "2024-07-01T19:25:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lxedk](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lxedk/32/77162_2.png) [@lxedk](https://discourse.slicer.org/u/lxedk)\
**Post date:** [July 1, 2024, 7:25pm UTC](https://discourse.slicer.org/t/localizing-a-fiducial-marker-in-a-dicom-volume/37129/1 "2024-07-01T19:25:40Z")

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Hello all,

I’m pretty new to 3D Slicer, and need some help with a project of mine. I have several DICOM volumes from MRI and I am trying to localize a fiducial marker that has a particular geometry. I have an STL of said fiducial marker, and I am wondering if there is a possibility of registering the STL directly to the DICOM file, or whether I would have to first find a way to convert the STL into a synthetic DICOM file.

Thanks!