# Add Scalar Volumes Not Functioning in Slicer 5.10.0

**URL:** <https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952>\
**Category:** Support\
**Created:** [May 7, 2026, 1:51pm UTC](https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952 "2026-05-07T13:51:32Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Hualiama](https://avatars.discourse-cdn.com/v4/letter/h/74df32/32.png) [@Hualiama](https://discourse.slicer.org/u/Hualiama)\
**Post date:** [May 7, 2026, 1:51pm UTC](https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952/1 "2026-05-07T13:51:32Z")

</div>

Good Day All,

I have been working on a study of the femur with a set of scans that have been split across two DICOM series. See below image for reference.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/f/7facbd6731e702179aabf430b81752f35068bf3f.jpeg)

I intend to reconstruct the femur with the inferior condyle for the purposes of my research. I planned on using the add scalar volumes tool in order to create a single volume to segment the regions of interest, but have not had much luck. I created two regions of interest and used the Crop Volume tool on each series as shown below:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/5/25fbbafc26491cd837e9bc101f631ff8d21b63c3.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/8/f872187d556bb89534346f69aa60d59afe09e445.jpeg)

However, whenever I attempt to user the Add Scalar Volumes tool it will only produce the following result, which is just **Input Volume 1** that is chosen in the tool menu.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/1/71eb49d4119f4835901dab02e4c17a1477ca78ee.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/d/e/dee171300981ec7a111a38d008e288eed8d87cb6.png)

I have attempted using the Add Scalar Volumes tool across multiple Slicer versions (5.4.0 and 5.11.0) and have found no success with the tool. I can confirm that both of the volumes are of Type Scalar. I haven’t found any threads reporting this issue, and thus am writing this support thread to see if anyone might have a solution to fix this issue.

If anyone has any advice or has encountered this issue as well and found a way to overcome it I would greatly appreciate their input. Thank you for your time.

---

<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [May 7, 2026, 1:56pm UTC](https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952/2 "2026-05-07T13:56:50Z")

</div>

You could try this module from the sandbox extension: [https://github.com/PerkLab/SlicerSandbox#stitch-volumes](https://github.com/PerkLab/SlicerSandbox#stitch-volumes)

---

<div class="post-metadata">

**Author:** ![Hualiama](https://avatars.discourse-cdn.com/v4/letter/h/74df32/32.png) [@Hualiama](https://discourse.slicer.org/u/Hualiama)\
**Post date:** [May 7, 2026, 2:19pm UTC](https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952/3 "2026-05-07T14:19:13Z")

</div>

Thank you, this worked quite well!