TABLE 1.

Definition of Success, Failure, and Editing-Required Ratings

Rating	Findings
Success	No or minimal interaction was needed by observer; for example, removing brain or bladder uptake or adding single region with single mouse click
Failure	Automatic segmentation missed more than half the visible tumor on scan, or tumor flooded into (also included) uptake in adjacent physiologic structures that required complex slice-by-slice editing of 3 or more regions
Editing required	One or 2 additional manual steps were required; for example, adding missed regions or deleting slice-by-slice up to 2 regions of physiologic uptake adjacent to tumor using eraser tool (typically bladder or kidneys)