Page History

...

The next class that we should examine is AnnotationEntity class. It is an abstract base class for the ImageAnnotation and AnnotationOfAnnotation classes. The AnnotationEntity class captures name, a general description of the AIM annotation, type of annotation via controlled terminology, creation date and time, a reference to the AIM template used to create an annotation, a reference to a previously related AIM annotation, and AIM annotation UID.

The ImageAnnotation class annotates images. The AnnotationOfAnnotation class annotates other AIM annotations for comparison and reference purposes. Both ImageAnnotation and AnnotationOfAnnotation have AnnotationRoleEntity, AuditTrail, InferenceEntity and TaskContextEntity classes. The ImageAnnotation associates with an abstract class SegmentationEntity. The model currently supports DICOM Segmentation via DicomSegmentationEntity. DICOM Segmentations are either binary or fractional. The DicomSegmentationEntity class represents a multi-frame image representing a classification of pixels in one or more referenced images. The class contains the DICOM SOP class UID that defines the type of segmentation. It references its own instance UID and the instance UID of the image to which the segmentation is applied. It also has an identification number for the segment that shall be unique within the segmentation instance in which it is created. An ImageAnnotation may have zero or more segmentation objects. The AnnotationRoleEntity describes a role of an annotation. Each instance can have a role associated with it, e.g. a baseline case. The InferenceEntity class provides a conclusion derived through interpreting an imaging study and/or medical history. The AuditTrail class captures the status of an annotation instance using a coded term, contains identifying and descriptive attributes of the reading session, and the reading subtask that results in clinical environment or trial findings. The class consists of the overall task and the specific subtask. A task represents a unit of overall work. It may have one or more subtasks.

...