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DWI models: Force presence of "param" entity #99

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May 15, 2024
Merged

DWI models: Force presence of "param" entity #99

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DWI models: Force presence of "param" entity
Lestropie May 15, 2024
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Merge branch 'bep-016' into force_param_entity
arokem May 15, 2024
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14 changes: 4 additions & 10 deletions src/derivatives/05-diffusion-derivatives.md
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Expand Up @@ -81,16 +81,6 @@ that warrant explicit mention due to their consequence in how they are represent
they MUST also specify requisite metadata fields regarding
how data across dimensions beyond the three spatial dimensions are to be interpreted.

In cases where a pipeline yields only a single parameter from a model,
entity "`_param-<label>`" MUST NOT be included; e.g.:
```Text
<pipeline_name>/
sub-<participant_label>/
dwi/
<source_keywords>[_space-<space>]_model-<label>_dwimap.nii[.gz]
<source_keywords>[_space-<space>]_model-<label>_dwimap.json
```

### Orientation encoding types

There are many mathematical bases that may be used
Expand Down Expand Up @@ -406,6 +396,10 @@ Dictionary `"ResponseFunction"` has the following reserved keywords:
rather, it is the *diffusivity* that is the estimated parameter,
and the *way in which the anisotropy of that parameter is encoded* is a tensor.

- Even if image `sub-01_model-tensor_param-diffusivity_dwimap.nii.gz`
were to be the only image yielded by the pipeline,
it is nevertheless REQUIRED to include entity "`_param-`" in those file names.

- Metadata fields relevant to the interpretation of the anisotropy of the tensor
are *not relevant* to the scalar measures
"`s0`" (estimated signal intensity with no diffusion weighting)
Expand Down
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