Hi all,

TLDR: I want to register two meshes and find the corresponding points/indices so that I can compare a derived value within and outside my region of interest.

I have mesh A generated by one modality, I then performed calculations at each vertex. The data looks like this:

```
calculated_value X Y Z
0.596 -65.355 15.519 190.760
0.601 -64.811 17.557 190.816
0.602 -66.040 17.290 191.835
0.598 -64.785 16.570 190.624
0.598 -64.020 16.604 190.632
..... ..... ..... .....
```

Mesh B was then generated from an MRI of the same organ using a different modality, and only corresponds to a region of interest relative to Mesh A. Looks something like this:

Mesh C was generated using the same methodology/modality as B and putatively corresponds to the full surface volume of mesh A.

I want to proceed to register the subset mesh with Mesh A for which I have calculations, with the intent of finding the coordinates (or index position) of the vertices so that I can subset out the calculated_values both inside and outside the region of interest.

Ultimately I need to derive a data table that looks like this:

```
region calculated_value X Y Z
mesh_a 0.596 -65.355 15.519 190.760
mesh_a 0.601 -64.811 17.557 190.816
mesh_b 0.602 -66.040 17.290 191.835
mesh_b 0.598 -64.785 16.570 190.624
mesh_b 0.598 -64.020 16.604 190.632
..... ..... ..... ...... .....
```

Is this possible?