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The classes in the Image Semantic Content group, shown in Figure 7, are used to gather image findings or interpretations of images. The ImagingPhysicalEntity class stores an anatomical location (e.g. femur) as a coded term from a recognized controlled vocabulary (RadLex, SNOMED-CT, UMLS, etc). The ImagingPhysicalEntityCharacteristic class further describes the ImagingPhysicalEntity class such as "fracture". The ImagingObservationEntity class is the description of things that are seen in an image. "Mass," "Radiographic evidence of pleural effusion," "Foreign Body," and Artifact," are all examples of ImagingObservationEntity. The ImagingObservationEntityCharacteristic class includes descriptors of the ImagingObservationEntity class such as "dense," "heterogeneous," "hypoechoic," and "spiculated". Both ImagingPhysicalEntityCharacteristic and ImagingObservationEntityCharacteristic may be associated with CharacteristicQuantification. A quantification can be a numerical value, an interval (e.g. 34-67%), a scale (e.g. 1:None, 2:Mild), a quantile (e.g. 1(1-50), 2(51-100)), and a non-quantifiable (e.g. none, mild, mark).
Figure 7. Image Semantic Content Group (Finding)
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