# Problems creating a volume from rotational angiography data

**URL:** <https://discourse.slicer.org/t/problems-creating-a-volume-from-rotational-angiography-data/6641>\
**Category:** Support\
**Created:** [April 29, 2019, 1:55pm UTC](https://discourse.slicer.org/t/problems-creating-a-volume-from-rotational-angiography-data/6641 "2019-04-29T13:55:45Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [April 29, 2019, 2:09pm UTC](https://discourse.slicer.org/t/problems-creating-a-volume-from-rotational-angiography-data/6641/2 "2019-04-29T14:09:40Z")

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This looks like a sinogram (projection images acquired during the rotation), which needs to be reconstructed to a 3D Cartesian volume. See more information in these topics:

> [@Volume rendering shows solid black cube only](https://discourse.slicer.org/t/volume-rendering-shows-solid-black-cube-only/4272/15):
>
> It looks like the image is not a Cartesian 3D volume but a [sinogram](https://en.wikipedia.org/wiki/Tomographic_reconstruction). You need to run these images through filtered backprojection or similar reconstruction method to get a 3D volume that you can load into Slicer.

> [@issues viewing DICOM files after import](https://discourse.slicer.org/t/issues-viewing-dicom-files-after-import/2768/2):
>
> Hi Freya, Based on the image in the lower right, it looks like you have projection data (aka sinogram data). When you scroll through the upper left, does it look like a sequence of images taken at different angles? If so, you need to ask the scanner technician for “reconstructed” data. Greg

> [@Deyline](#):
>
> For the second image, a 3D model was generated in the machine that does the angiography. Is it possible to generate volumes from these already pre-made volumes from the machine’s software?

That is just a screenshot. If there is any 3D information in that image, it is stored in private fields.

What devices (manufacturer, model, number) did you use to acquire and visualize/reconstruct the images?

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