# Why when adding point using Pick'n paint module it add too many points?

**URL:** <https://discourse.slicer.org/t/why-when-adding-point-using-pickn-paint-module-it-add-too-many-points/23516>\
**Category:** Support\
**Created:** [May 21, 2022, 8:16am UTC](https://discourse.slicer.org/t/why-when-adding-point-using-pickn-paint-module-it-add-too-many-points/23516 "2022-05-21T08:16:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Moh\_d\_Al-Watary](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/moh_d_al-watary/32/14124_2.png) [@Moh\_d\_Al-Watary](https://discourse.slicer.org/u/Moh_d_Al-Watary)\
**Post date:** [May 21, 2022, 8:16am UTC](https://discourse.slicer.org/t/why-when-adding-point-using-pickn-paint-module-it-add-too-many-points/23516/1 "2022-05-21T08:16:21Z")

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Operating system:Windows 10 Education  
Slicer version:4.13.0-2022-02-02  
Expected behavior: when adding a point using Pick’n paint module, it will add only one point in the specific area.  
Actual behavior: automatically a lot of point are added (as shown in the screen shot below)!

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/3/932844a61fedbfc315d5a18e2830ed326c631c7e.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 21, 2022, 1:51pm UTC](https://discourse.slicer.org/t/why-when-adding-point-using-pickn-paint-module-it-add-too-many-points/23516/2 "2022-05-21T13:51:24Z")

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Probably this module has not been updated to work with recent Slicer versions.

In latest Slicer versions, the `Dynamic Modeler` module has a new tool `Select by points`, which can be used instead of Pick and Paint:

> [@New Dynamic Modeler Tool: Select by Points](https://discourse.slicer.org/t/new-dynamic-modeler-tool-select-by-points/22165):
>
> [[Select By Points Tool, Dynamic Modeler, 3D Slicer] ](https://www.youtube.com/watch?v=Klsi6x3F5D4) Select by points tool is available on the Dynamic Modeler module since end of October 2021 Slicer Preview Release This tools allows you to create 2 types of output models from an input model, a fiducial list, a selection-distance and a selection-algorithm. One of the possible outputs is copy of the input model with selection scalars (unselected=0, selected=1) according to the selection-algorithm and selection-distance using the f…

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**Author:** ![Moh\_d\_Al-Watary](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/moh_d_al-watary/32/14124_2.png) [@Moh\_d\_Al-Watary](https://discourse.slicer.org/u/Moh_d_Al-Watary)\
**Post date:** [May 26, 2022, 7:03am UTC](https://discourse.slicer.org/t/why-when-adding-point-using-pickn-paint-module-it-add-too-many-points/23516/3 "2022-05-26T07:03:42Z")

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Thank you for your reply, but I still confused!  
I am measuring the distance between two models of the same region but on two time different CT, so I was using Pick’ n pain (to determine the ROI), distance to distance model (to calculate the distance between the two superimposed models) and the using Mesh statistics (to export the measurements in mm)!  
Now, I have loaded the models, opened the dynamic modeler: but could not use it (although seen the shared YouTube clip, still not clear)!

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/f/2f03d7cbb0c42c6d4a46146100859b81cdd84a8b.png)

a second question-please-: when I have do registration of T1 and T2 CT and saved them, when I reopened them they appear like this (disoriented) so how could this be solved?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/3/e3a93736b3bea87a63a23753ca9a8d0dc12e4bba.png)  
Thank you so much for valuable time and advices

Sincerely