MRICloudCoregMPR
================

**Purpose.** Coregister perfusion outputs to **MPR** (MRICloud structural) space and rename results with ``_mpr`` suffixes.

Workflow
--------

1. Build a **skull-stripped** MPR target via helper (uses ``mpr_folder``, ``mpr_name``).
2. Choose source:
   - if ``M0Type != "Estimate"`` → ``rM0ave.nii``
   - else → ``mean{asl}.nii``
3. Coregister other files in perf space to MPR:
   - ``{asl}_aCBF_native.nii``, ``{asl}_rCBF_native.nii``, ``brnmsk_clcu.nii``
   - plus ``{asl}_ATT_native.nii`` if multi-delay and present
4. Rename outputs:
   - ``r{asl}_aCBF_native.nii`` → ``{asl}_aCBF_mpr.nii`` (and similarly for rCBF, ATT, mask)

Inputs
------

- ``MRICloudReadMPR`` must be run beforehand to populate ``mpr_folder``/``mpr_name``.
- Perfusion outputs from MRICloud CBF/M0 steps.

Outputs
-------

- ``{asl}_aCBF_mpr.nii``, ``{asl}_rCBF_mpr.nii``, optional ``{asl}_ATT_mpr.nii``
- ``brnmsk_clcu_mpr.nii``

Configuration
-------------

- None.

YAML example
------------

.. code-block:: yaml

      modules:
      - name: MRICloudCoregMPR