# Straightened volume failed in version 5.1.0-2022-05-01

**URL:** https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435
**Category:** Support
**Created:** [May 16, 2022, 6:21am UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435 "2022-05-16T06:21:56Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![chendong9416](https://avatars.discourse-cdn.com/v4/letter/c/c2a13f/32.png) [@chendong9416](https://discourse.slicer.org/u/chendong9416)
#### Post date: [May 16, 2022, 6:21am UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435/1 "2022-05-16T06:21:56Z")

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Recently, i made an update for 3D slicer to version 5.1.0-2022-05-01, and used open curve module to for a center line for the aorta, then i used curved planar reformat to form a straightened volume base on the open curve, but it turned with grey without any true imaging, is there a bug for the module in this new version? how can i deal with it ? thanks.

 ![1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/9/297f6be953de17c5a1eefbba5fed1ee8adc31c6d.png)

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### Author: ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [May 16, 2022, 9:22pm UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435/2 "2022-05-16T21:22:57Z")

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I’ve just tested this on an aortic arch CT using Slicer-5.1.0-2022-05-08 on Windows and everything worked well.

Maybe you just need to [adjust the window/level setting](https://slicer.readthedocs.io/en/latest/user_guide/user_interface.html#adjusting-image-window-level).

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### Author: ![chendong9416](https://avatars.discourse-cdn.com/v4/letter/c/c2a13f/32.png) [@chendong9416](https://discourse.slicer.org/u/chendong9416)
#### Post date: [May 16, 2022, 10:28pm UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435/3 "2022-05-16T22:28:07Z")

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it not the window/setting issue, another thing different is the resolution of tgis CTA is 1.25mm, i usually works with 0.625mm, it this a potential problem?

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### Author: ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [May 17, 2022, 12:10am UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435/4 "2022-05-17T00:10:22Z")

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That spacing difference is not that big, it should not cause any problem. Do you find that the module works with most CTs but not with a specific one?

Maybe the problematic CT has non-uniform spacing and so an acquisition transform is applied on import. [Hardening the transform on the volume](https://slicer.readthedocs.io/en/latest/user_guide/modules/transforms.html#harden-transform-on-a-node) will resolve this problem.

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### Author: ![chendong9416](https://avatars.discourse-cdn.com/v4/letter/c/c2a13f/32.png) [@chendong9416](https://discourse.slicer.org/u/chendong9416)
#### Post date: [May 17, 2022, 3:15am UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435/5 "2022-05-17T03:15:25Z")

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The module does not work with other CTA, but these problems solved automaticly when i made an update to version 5.1.0-2022-05-14, thanks for your advice anyway.