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Diffusion derivatives: Formatting
- Fix use of superscripts in "Scalar maps" table. - For "Units" field in tractography JSON file, list possible values in the same format as that used elsewhere in the document.
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‎src/05-derivatives/05-diffusion-derivatives.md‎

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@@ -268,28 +268,28 @@ fields for the maps.
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These maps are saved 3D NIfTI files (x,y,z). Some examples of such maps are as follows:
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| `<parameter>` value | Description | Possible Model sources | Unit or scale |
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| ------------------- | ------------------------------------------------------------------ | -----------------------------------------------------------------------------------| ----------------------- |
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| FA | Fractional Anisotropy | DTI, DKI, WMTI (D, Dh, Dr) | Unitless \[0-1\] |
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| MD | Mean diffusivity (also called apparent diffusion coefficient, ADC) | DTI, DKI, WMTI (D, Dh, Dr) | microns^2/ms ^1 |
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| AD | Axial Diffusivity (also called parallel diffusivity) | DTI, DKI, WMTI (D, Dh, Dr) | microns^2/ms ^1 |
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| RD | Radial Diffusivity (also called perpendicular diffusivity) | DTI, DKI, WMTI (D, Dh, Dr) | microns^2/ms ^1 |
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| MODE | Mode of the tensor | DTI, DKI, WMTI (D, Dh, Dr) | |
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| LINEARITY | Tensor linearity (Westin 1997) | DTI, DKI, WMTI (D, Dh, Dr) | |
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| PLANARITY | Tensor planarity (Westin 1997) | DTI, DKI, WMTI (D, Dh, Dr) | |
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| SPHERICITY | Tensor sphericity (Westin 1997) | DTI, DKI, WMTI (D, Dh, Dr) | |
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| MK | Mean kurtosis | DKI, WMTI | Unitless |
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| RK | Radial kurtosis | DKI, WMTI | Unitless |
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| AK | Axial kurtosis | DKI, WMTI | Unitless |
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| GFA | Generalized Fractional Anisotropy | CSA, CSD, SHORE, MAPMRI, Forecast (or any model that can be represented as an ODF) | Proportion \[0-1\] |
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| FSUM | Sum of partial volume fractions of stick components | Ball-and-stick(s) | Volume fraction \[0-1\] |
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| Fi | Volume fraction of stick i | Ball-and-stick(s) | Volume fraction \[0-1\] |
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| D | Diffusivity | Ball-and-stick(s) | microns^2/ms ^1 |
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| DSTD | Standard deviation of diffusivity | Ball-and-stick(s) | microns^2/ms |
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| RTPP | Return to the plane probability | MAPMRI | Probability \[0-1\] |
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| RTAP | Return to axis probability | MAPMRI | Probability \[0-1\] |
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^1 For example, for free water in body temperature, the diffusivity in units of microns^2/ms should be approximately 3.0.
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| `<parameter>` value | Description | Possible Model sources | Unit or scale |
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| ------------------- | ------------------------------------------------------------------ | -----------------------------------------------------------------------------------| ----------------------------------- |
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| FA | Fractional Anisotropy | DTI, DKI, WMTI (D, Dh, Dr) | Unitless \[0-1\] |
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| MD | Mean diffusivity (also called apparent diffusion coefficient, ADC) | DTI, DKI, WMTI (D, Dh, Dr) | microns<sup>2<\sup>/ms <sup>1<\sup> |
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| AD | Axial Diffusivity (also called parallel diffusivity) | DTI, DKI, WMTI (D, Dh, Dr) | microns<sup>2<\sup>/ms <sup>1<\sup> |
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| RD | Radial Diffusivity (also called perpendicular diffusivity) | DTI, DKI, WMTI (D, Dh, Dr) | microns<sup>2<\sup>/ms <sup>1<\sup> |
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| MODE | Mode of the tensor | DTI, DKI, WMTI (D, Dh, Dr) | |
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| LINEARITY | Tensor linearity (Westin 1997) | DTI, DKI, WMTI (D, Dh, Dr) | |
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| PLANARITY | Tensor planarity (Westin 1997) | DTI, DKI, WMTI (D, Dh, Dr) | |
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| SPHERICITY | Tensor sphericity (Westin 1997) | DTI, DKI, WMTI (D, Dh, Dr) | |
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| MK | Mean kurtosis | DKI, WMTI | Unitless |
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| RK | Radial kurtosis | DKI, WMTI | Unitless |
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| AK | Axial kurtosis | DKI, WMTI | Unitless |
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| GFA | Generalized Fractional Anisotropy | CSA, CSD, SHORE, MAPMRI, Forecast (or any model that can be represented as an ODF) | Proportion \[0-1\] |
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| FSUM | Sum of partial volume fractions of stick components | Ball-and-stick(s) | Volume fraction \[0-1\] |
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| Fi | Volume fraction of stick i | Ball-and-stick(s) | Volume fraction \[0-1\] |
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| D | Diffusivity | Ball-and-stick(s) | microns<sup>2<\sup>/ms <sup>1<\sup> |
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| DSTD | Standard deviation of diffusivity | Ball-and-stick(s) | microns<sup>2<\sup>/ms |
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| RTPP | Return to the plane probability | MAPMRI | Probability \[0-1\] |
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| RTAP | Return to axis probability | MAPMRI | Probability \[0-1\] |
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<sup>1<\sup> For example, for free water in body temperature, the diffusivity in units of microns<sup>2<\sup>/ms should be approximately 3.0.
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### Directionally-encoded colour (DEC) maps
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@@ -406,16 +406,16 @@ RECOMMENDED to appear within the "`Constraints`" field when "`TractographyClass`
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RECOMMENDED to appear within the "`Parameters`" field when "`TractographyClass`" is "`local`":
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| **Key name** | **Description** |
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| ----------------- | -------------------------------------------------- |
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| Units | "mm","norm" (applies to all within "`Parameters`") |
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| StepSize | value |
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| AngleCurvature | value (maximum angle per step) |
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| RadiusCurvature | value (minimal radius of curvature) |
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| MinimumLength | value |
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| MaximumLength | value |
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| IntegrationOrder | integer |
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| Unidirectional | bool |
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| **Key name** | **Description** |
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| ----------------- | ---------------------------------------------------- |
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| Units | {`mm`,`norm`} (applies to all within "`Parameters`") |
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| StepSize | value |
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| AngleCurvature | value (maximum angle per step) |
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| RadiusCurvature | value (minimal radius of curvature) |
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| MinimumLength | value |
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| MaximumLength | value |
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| IntegrationOrder | integer |
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| Unidirectional | bool |
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RECOMMENDED to appear within the "Seeding" field when `TractographyClass` is `local`:
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