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. 2021 Jan 20;3(2):e200254. doi: 10.1148/ryai.2021200254

Figure 2:

Study-level label schema. If a study had at least one image annotated as PE Present on Image, the study had additional labels for location (one or more), RV/LV ratio (only one), and type (only one, where Acute PE is assumed if neither Chronic PE nor Acute and Chronic PE is annotated). Dashed lines indicate implied study-level labels. Similarly, if the study was labeled as Indeterminate, it was annotated with one or more quality assurance (QA) labels. Note that True Filling Defect not PE and Flow Artifact are informational labels only and not included in this diagram. LV = left ventricle, PE = pulmonary embolism, RV = right ventricle.

Study-level label schema. If a study had at least one image annotated as PE Present on Image, the study had additional labels for location (one or more), RV/LV ratio (only one), and type (only one, where Acute PE is assumed if neither Chronic PE nor Acute and Chronic PE is annotated). Dashed lines indicate implied study-level labels. Similarly, if the study was labeled as Indeterminate, it was annotated with one or more quality assurance (QA) labels. Note that True Filling Defect not PE and Flow Artifact are informational labels only and not included in this diagram. LV = left ventricle, PE = pulmonary embolism, RV = right ventricle.