# General Registration won't recognize a series 

**URL:** <https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224>\
**Category:** Support\
**Created:** [June 18, 2019, 8:52pm UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224 "2019-06-18T20:52:27Z")\
**Posts on this page:** 10\
**Page:** 1

<div class="post-metadata">

**Author:** ![jwatson](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jwatson](https://discourse.slicer.org/u/jwatson)\
**Post date:** [June 18, 2019, 8:52pm UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/1 "2019-06-18T20:52:27Z")

</div>

Hello,

I am trying to co-register two different sequences from the same patient in Slicer, however, only one of the sequences is being recognized in the drop down menu for the fixed and moving images. I can select both sequences as volumes in other modules, but the registration does not display one of the sequences. Any hep is much appreciated.

---

<div class="post-metadata">

**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:** [June 18, 2019, 9:10pm UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/2 "2019-06-18T21:10:55Z")

</div>

What is the volume type? You can find it in Volumes module. It can be Scalar, Vector, Tensor, etc.

If it is a vector volume then use Vector to Scalar volume module to convert to scalar volume.

---

<div class="post-metadata">

**Author:** ![jwatson](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jwatson](https://discourse.slicer.org/u/jwatson)\
**Post date:** [June 18, 2019, 10:11pm UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/3 "2019-06-18T22:11:23Z")

</div>

On the vector to scalar module it won’t let me click the ‘Input Vector Volume’ drop down. It lets me select an output scale volume but not an input.

---

<div class="post-metadata">

**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:** [June 18, 2019, 10:40pm UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/4 "2019-06-18T22:40:39Z")

</div>

What is the volume type of the two volumes? You can find it in Volumes module. It can be Scalar, Vector, Tensor, etc.

---

<div class="post-metadata">

**Author:** ![jwatson](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jwatson](https://discourse.slicer.org/u/jwatson)\
**Post date:** [June 21, 2019, 12:59am UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/5 "2019-06-21T00:59:11Z")

</div>

It says its an ‘MRMLMulti’ volume

---

<div class="post-metadata">

**Author:** ![jwatson](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jwatson](https://discourse.slicer.org/u/jwatson)\
**Post date:** [June 21, 2019, 1:28am UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/6 "2019-06-21T01:28:13Z")

</div>

I tried to resample using the ‘Resample scalar/vector/DWI Volume’ module (input: the image, output: a newly created volume, reference volume: another scalar volume), but the output image is only a single slice and not an entire volume.

---

<div class="post-metadata">

**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:** [June 21, 2019, 1:42am UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/7 "2019-06-21T01:42:19Z")

</div>

> [@jwatson](#):
>
> It says its an ‘MRMLMulti’ volume

This means that the image is a time series. Most likely a single slice, changing in time.

---

<div class="post-metadata">

**Author:** ![jwatson](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jwatson](https://discourse.slicer.org/u/jwatson)\
**Post date:** [June 21, 2019, 1:45am UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/8 "2019-06-21T01:45:47Z")

</div>

Its a T2-weighted structural image – I’m not sure why it would read it as a time series … is there any way to convert it to a scalar volume?

---

<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:** [June 21, 2019, 11:01am UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/9 "2019-06-21T11:01:14Z")

</div>

Depending on your data it might work to turn off the multivolume plugin and select scalar volume explicitly using the advanced dicom import option.

[https://www.slicer.org/wiki/Documentation/4.10/Modules/DICOM](https://www.slicer.org/wiki/Documentation/4.10/Modules/DICOM)

---

<div class="post-metadata">

**Author:** ![jwatson](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jwatson](https://discourse.slicer.org/u/jwatson)\
**Post date:** [June 21, 2019, 5:48pm UTC](https://discourse.slicer.org/t/general-registration-wont-recognize-a-series/7224/10 "2019-06-21T17:48:03Z")

</div>

That worked, thank you very much!