MRICloudT1ROICBFAverage
=======================

**Purpose.** Compute ROI-wise **aCBF** and **rCBF** means using **T1-based** MRICloud segmentations.

Inputs
------

- ``{asl}_aCBF_mpr.nii``, ``{asl}_rCBF_mpr.nii`` (from :doc:`mricloud_coreg_mpr`)
- ``brnmsk_clcu_mpr.nii`` (mask in MPR space)
- Under ``derivatives/<sub>/anat/<mpr_folder>``:
  - ``multilevel_lookup_table.txt``
  - An ROI stats file matching ``{mpr_name}*{N}*MNI_stats.txt``
  - Native-space ROI mask ``{mpr_name}*{N}*.img`` (non-MNI)

Outputs
-------

- Text report: ``perf/{asl}_CBF_T1segmented_ROIs.txt``
- Additionally writes level-specific segmentation masks:
  - ``anat/<mpr_folder>/{mpr_name}_{seg_num}_segments.nii``

ROI levels & mapping
--------------------

- Analyzes 3 hierarchical levels by default: ``Type1-L2``, ``Type1-L3``, ``Type1-L5``.
- Full label list (all ROIs) is also summarized at the end of the report.

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

- None.

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

.. code-block:: yaml

    modules:
      - name: MRICloudT1ROICBFAverage