I need to understand what is tx in ANTspy

Can the TX be the MNI152_T1_1mm_brain.nii.gz file?

Using flirt, I aligned the T1w together by setting one T1w image as the reference and aligned the rest on it.

The ref T1w was transformed to MNI152 first before using it. Now I want to use ants to transform to the Jacobian domain, So what’s the correct way to use the below function to transform the T1w images to jacobian?

```
def create_jacobian_determinant_image(domain_image, tx, do_log=False, geom=False):
"""
Compute the jacobian determinant from a transformation file
ANTsR function: `createJacobianDeterminantImage`
Arguments
---------
domain_image : ANTsImage
image that defines transformation domain
tx : string
deformation transformation file name
do_log : boolean
return the log jacobian
geom : bolean
use the geometric jacobian calculation (boolean)
Returns
-------
ANTsImage
Example
-------
>>> import ants
>>> fi = ants.image_read( ants.get_ants_data('r16'))
>>> mi = ants.image_read( ants.get_ants_data('r64'))
>>> fi = ants.resample_image(fi,(128,128),1,0)
```