Merge pull request #1912 from effigies/fix/tb1epi_consistency

[FIX] Define a metadata table for TB1EPI

src/appendices/qmri.md

@@ -607,10 +607,15 @@ The nominal FA value of the SE pulse is twice this value.
 Note that the following metadata fields MUST be defined in the accompanying JSON
 files:
 
-| **Field name**     | **Definition**                                                                                                                                 |
-| ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------- |
-| `TotalReadoutTime` | The effective readout length defined as `EffectiveEchoSpacing * PEReconMatrix`, with `EffectiveEchoSpacing = TrueEchoSpacing / PEacceleration` |
-| `MixingTime`       | Time interval between the SE and STE pulses                                                                                                    |
+<!-- This block generates a metadata table.
+These tables are defined in
+  src/schema/rules/sidecars
+The definitions of the fields specified in these tables may be found in
+  src/schema/objects/metadata.yaml
+A guide for using macros can be found at
+ https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
+-->
+{{ MACROS___make_sidecar_table("fmap.TB1EPI") }}
 
 To properly identify constituents of this particular method, values of the `echo`
 entity MUST index the images as follows:

src/schema/rules/sidecars/fmap.yaml

@@ -69,3 +69,13 @@ MRIFieldmapPepolar:
   fields:
     PhaseEncodingDirection: required
     TotalReadoutTime: required
+
+TB1EPI:
+  selectors:
+    - datatype == "fmap"
+    - suffix == "TB1EPI"
+  fields:
+    EchoTime: required
+    FlipAngle: required
+    TotalReadoutTime: required
+    MixingTime: required