touching up classifiers

fileformats/medimage/__init__.py

@@ -46,9 +46,6 @@
 from .surface import (
     Gifti  # noqa: F401
 )
-from .contents.anatomical import (
-    AnatomicalEntity  # noqa: F401
-)
 from .contents.imaging.modality import (  # noqa: F401
     ImagingModality,
     CombinedModalities,
@@ -92,6 +89,10 @@
     RG,
     US,
 )
-from .contents.derivatives import (
+from .contents.imaging.derivatives import (
+    Derivative,
     Mask
 )
+from .contents.anatomical_entity.material_anatomical_entity.anatomical_structure import (
+    Brain, SpinalCord
+)

fileformats/medimage/base.py

@@ -4,6 +4,9 @@
 from fileformats.core import hook
 from fileformats.core.mixin import WithClassifiers
 from .contents import ContentsClassifier
+from .contents.imaging.modality import ImagingModality
+from .contents.imaging.derivatives import Derivative
+from .contents.anatomical_entity.material_anatomical_entity import AnatomicalEntity
 
 logger = logging.getLogger("fileformats")
 
@@ -20,6 +23,7 @@ class MedicalImage(WithClassifiers, FileSet):
     IGNORE_HDR_KEYS = None
     binary = True
     allowed_classifiers = (ContentsClassifier,)
+    exclusive_classifiers = (ImagingModality, AnatomicalEntity, Derivative)
 
     @hook.extra
     def read_array(self) -> "numpy.ndarray":  # noqa

fileformats/medimage/contents/anatomical_entity/material_anatomical_entity/__init__.py

@@ -0,0 +1,5 @@
+from .. import AnatomicalEntity
+
+
+class MaterialAnatomicalEntity(AnatomicalEntity):
+    pass

fileformats/medimage/contents/anatomical_entity/material_anatomical_entity/anatomical_structure.py

@@ -0,0 +1,29 @@
+from . import MaterialAnatomicalEntity
+
+
+class AnatomicalStructure(MaterialAnatomicalEntity):
+    pass
+
+
+class CardinalOrganPart(AnatomicalStructure):
+    pass
+
+
+class OrganRegion(CardinalOrganPart):
+    pass
+
+
+class OrganSegment(OrganRegion):
+    pass
+
+
+class SegmentOfNeuraxis(OrganRegion):
+    pass
+
+
+class Brain(SegmentOfNeuraxis):
+    pass
+
+
+class SpinalCord(SegmentOfNeuraxis):
+    pass

fileformats/medimage/contents/imaging/derivatives.py

@@ -0,0 +1,17 @@
+from .. import ContentsClassifier
+
+
+class Derivative(ContentsClassifier):
+    """An image type that is derived from other images"""
+
+
+class Mask(Derivative):
+    """A binary image that is multiplied with a real-valued image to select sections
+    of the image for analysis"""
+
+
+class FibreOrientationDistribution(Derivative):
+    pass
+
+
+FOD = FibreOrientationDistribution