# \#image-dimensions

**URL:** https://discourse.slicer.org/tag/image-dimensions/254.md

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## [How to change segmentation sizes?](https://discourse.slicer.org/t/how-to-change-segmentation-sizes/27920)

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**Author:** [@radiodid](https://discourse.slicer.org/u/radiodid)\
**Replies:** 0\
**Last updated:** [February 20, 2023, 6:47am UTC](https://discourse.slicer.org/t/how-to-change-segmentation-sizes/27920 "2023-02-20T06:47:29Z")

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I’m having trouble with the segmentation size in Slicer. The size of the CT I am working on is 400x400x296, but the segmentation is 252x351x270. I tried to create other segmentations and each time the size is different a…

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## [Removing the 4th dimension from NRRD file](https://discourse.slicer.org/t/removing-the-4th-dimension-from-nrrd-file/27362)

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**Author:** [@Senn81](https://discourse.slicer.org/u/Senn81)\
**Replies:** 2\
**Last updated:** [January 19, 2023, 6:58pm UTC](https://discourse.slicer.org/t/removing-the-4th-dimension-from-nrrd-file/27362 "2023-01-19T18:58:14Z")

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Hi Slicer support In some of my segmentations my NRRD files have an extra dimension (4th dimension). This has caused issues with compatibility with certain software loading the file up. Would anyone know how to remove t…

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## [The saved segmentation file size is different from the original volume nrrd file size](https://discourse.slicer.org/t/the-saved-segmentation-file-size-is-different-from-the-original-volume-nrrd-file-size/23644)

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**Author:** [@parijat\_patel](https://discourse.slicer.org/u/parijat_patel)\
**Replies:** 4\
**Last updated:** [May 31, 2022, 10:17am UTC](https://discourse.slicer.org/t/the-saved-segmentation-file-size-is-different-from-the-original-volume-nrrd-file-size/23644 "2022-05-31T10:17:12Z")

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Hello, I am using Slicer-4.11.20210226-linux-amd64 to create segmentations data to train a segmentation algorithm to automatically segment the fat depots in CT scan. The dimensions of the saved 3D segmentation file (rows…

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## [Bounding box correction](https://discourse.slicer.org/t/bounding-box-correction/22251)

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**Author:** [@Kalman](https://discourse.slicer.org/u/Kalman)\
**Replies:** 1\
**Last updated:** [March 5, 2022, 7:33pm UTC](https://discourse.slicer.org/t/bounding-box-correction/22251 "2022-03-05T19:33:41Z")

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Hi, I would like to ask you regarding the size of the transformation result. The brief summary: I use the Elastix modul for non-linear normalization to get the transformation matrix (on a mean volume), which is then app…

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## [Resampling a volume and Image Spacing](https://discourse.slicer.org/t/resampling-a-volume-and-image-spacing/12066)

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**Author:** [@Deepa](https://discourse.slicer.org/u/Deepa)\
**Replies:** 6\
**Last updated:** [June 17, 2020, 5:13pm UTC](https://discourse.slicer.org/t/resampling-a-volume-and-image-spacing/12066 "2020-06-17T17:13:42Z")

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Hi All, I have got a volume with the following dimensions 1702 x1678 x 251. I want to reduce the resolution in xy direction and leave z unaltered. May I know which module can be used to do the above? I’ve checked t…