To do metric test for imported .nrrd images

Support
1

The loaded .nrrd files not appeared in the moving and fixed image list for metric test module. How to get those in the list.

2

Which exact module you are trying to use (name of extension and module name)?
Is there a chance that the nrrd file contains tensor or vector data (time sequence, color, diffusion image…)?

3

It is loaded as FSPGR Bravo 1.4mm-as DWI Volume. Is there any problem if it contains vector data.

4

Registration–Metric Test

5

I have converted Fiesta and SPGR images using DWIconvert into .nrrd files and it is stored as DWI file. I applied Transforms and it has stored as new transform and new displacement file. Once I open to do metric test in General registration I could see only displacement file which is stored in convert section of Transform module. I cannot see any of nrrd original file in the list of moving and fixed image. How to do metric test for these images.

6

Yes, it is. Metric test module only accepts scalar images, not vector or tensor images. You can use “Vector to scalar volume” to choose a scalar component of a vector or tensor image and analyze the metric on that image.

What is your overall goal? What information do you expect from metric test will give you?

7

I would like to see metric scoring with and without applying scaling factor in transform to study the mri images.

8

While converting I did not select any of Advanced Conversion Parameters to give scalar image. Any how the image is not having vector quantity since image is not dwi or dti image.

9

Scoring of what metric? What scaling factor: spatial or intensity?

There are no “Advanced Conversion Parameters” in “Vector to Scalar Volume” module. Which module did you use?
Is your input volume type scalar or vector (Volumes module / Volume information / Volume type)?