# Rt structure misalignment with image

**URL:** <https://discourse.slicer.org/t/rt-structure-misalignment-with-image/13711>\
**Category:** Support\
**Created:** [September 26, 2020, 1:02pm UTC](https://discourse.slicer.org/t/rt-structure-misalignment-with-image/13711 "2020-09-26T13:02:05Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Iman\_Shokatian](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/iman_shokatian/32/5019_2.png) [@Iman\_Shokatian](https://discourse.slicer.org/u/Iman_Shokatian)\
**Post date:** [September 26, 2020, 1:02pm UTC](https://discourse.slicer.org/t/rt-structure-misalignment-with-image/13711/1 "2020-09-26T13:02:05Z")

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Hi,

I have US images with its corresponding rt structure. I am using slicerrt module for visualizing rt structure but as you can see in the attached image, rt structure is not aligned correctly with the image. what should I do to align them correctly?

I would be appreciated for your help in advance.

 ![Screenshot](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/0/100cc3b5158b3470a544d2679787e0a936523439.png)

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [September 26, 2020, 1:51pm UTC](https://discourse.slicer.org/t/rt-structure-misalignment-with-image/13711/2 "2020-09-26T13:51:13Z")

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Did you load the US images also through the DICOM browser?

Also, if you use 4.10.2 or older, please download a recent preview version and try again.

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**Author:** ![Iman\_Shokatian](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/iman_shokatian/32/5019_2.png) [@Iman\_Shokatian](https://discourse.slicer.org/u/Iman_Shokatian)\
**Post date:** [September 27, 2020, 8:56am UTC](https://discourse.slicer.org/t/rt-structure-misalignment-with-image/13711/3 "2020-09-27T08:56:29Z")

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Hi cpinter,

I load US images through DICOM browser and do all the process by using both nightly and stable 3d slicer latest version.

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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:** [September 27, 2020, 1:04pm UTC](https://discourse.slicer.org/t/rt-structure-misalignment-with-image/13711/4 "2020-09-27T13:04:38Z")

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Is the structure set a full 3D volume of the prostate or just a flat single-slice segmentation? Is the ultrasound a single slice, a non-position-tracked time sequence of slices, or a reconstructed 3D volume?

If you want a 3D structure set line up with the ultrasound then you need to export the reconstructed 3D volume from Oncentra, not the uncalibrated, unregistered input image sequence.