Using MRIQC for FLAIR images

Summary of what happened:

I am trying to use MRIQC on my FLAIR images. However, FLAIR as a modality does not exist. Since I know that FLAIR is a subcategory of T2w images, I changed each FLAIR suffix in the file names within my BIDS-conform data to T2w so that the command can recognize it as such. However, it still did not work unfortunately.

My question is: what should I do differently to what is stated right below?

Command used:

mriqc rawdata_tmp derivatives_tmp participant --participant-label 100000 -m T2w --no-sub --reports-only


MRIQC (v23.1.0)

Environment (Docker, Singularity / Apptainer, custom installation):

MRIQC is available as a module provided by my system’s administrator.

Data formatted according to a validatable standard? Please provide the output of the validator:

Already validated to be correct by BIDS Validator v1.14.6.

Relevant log outputs (up to 20 lines):

240709-14:07:58,827 nipype.workflow WARNING:
         Storing result file without outputs
240709-14:07:58,828 nipype.workflow WARNING:
         [Node] Error on "mriqc_wf.anatMRIQC.ComputeIQMs.measures" (/data/one_sub_mriqc/work/mriqc_wf/anatMRIQC/ComputeIQMs/
240709-14:08:00,599 nipype.workflow ERROR:
         Node measures.a0 failed to run on host zislrds0052.zi.local.
240709-14:08:00,600 nipype.workflow ERROR:
         Saving crash info to /data/one_sub_mriqc/derivatives_tmp/logs/crash-20240709-140800-amrou.abas-measures.a0-9e3a3d33-776a-48ae-ba6e-8a15c1293cc5.txt
Traceback (most recent call last):
  File "/opt/conda/lib/python3.9/site-packages/mriqc/engine/", line 60, in run_node
    result["result"] =
  File "/opt/conda/lib/python3.9/site-packages/nipype/pipeline/engine/", line 527, in run
    result = self._run_interface(execute=True)
  File "/opt/conda/lib/python3.9/site-packages/nipype/pipeline/engine/", line 645, in _run_interface
    return self._run_command(execute)
  File "/opt/conda/lib/python3.9/site-packages/nipype/pipeline/engine/", line 771, in _run_command
    raise NodeExecutionError(msg)
nipype.pipeline.engine.nodes.NodeExecutionError: Exception raised while executing Node measures.

        Traceback (most recent call last):
          File "/opt/conda/lib/python3.9/site-packages/nipype/interfaces/base/", line 397, in run
            runtime = self._run_interface(runtime)
          File "/opt/conda/lib/python3.9/site-packages/mriqc/interfaces/", line 114, in _run_interface
            raise RuntimeError(
        RuntimeError: Input inhomogeneity-corrected data seem empty. MRIQC failed to process this dataset.

Screenshots / relevant information:

Operating System: Ubuntu 22.04.3 LTS