# About itk image format conversion

**URL:** https://discourse.itk.org/t/about-itk-image-format-conversion/5780
**Category:** Engineering
**Tags:** registration, dicom
**Created:** [March 3, 2023, 5:53am UTC](https://discourse.itk.org/t/about-itk-image-format-conversion/5780 "2023-03-03T05:53:22Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![ma1282029525](https://discourse.itk.org/user_avatar/discourse.itk.org/ma1282029525/32/3084_2.png) [@ma1282029525](https://discourse.itk.org/u/ma1282029525)
#### Post date: [March 3, 2023, 5:53am UTC](https://discourse.itk.org/t/about-itk-image-format-conversion/5780/1 "2023-03-03T05:53:22Z")

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I am now completing the interface of a registration module, but the images given to me by others are many sequence images in gdcm format. How can I convert these images into the format available for registration.

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### Author: ![dzenanz](https://discourse.itk.org/user_avatar/discourse.itk.org/dzenanz/32/1093_2.png) [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [March 3, 2023, 1:45pm UTC](https://discourse.itk.org/t/about-itk-image-format-conversion/5780/2 "2023-03-03T13:45:13Z")

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Here is an [example](https://examples.itk.org/src/io/gdcm/readdicomseriesandwrite3dimage/documentation) demonstrating how to read a DICOM series. You could use this example to convert all your inputs to NRRD format, or you could take the reading part into your application, and then operate on DICOMs directly.