Description |
description:
A Region of Interest (ROI) specified for an image using an overlay shape. Typically
used to make reference to specific regions in images, e.g., to specify the location
of a radiologic finding in an image or to specify the site of a physical finding by
"circling" a region in a schematic picture of a human body. The units of the coordinate
values are in pixels. The origin is in the upper left hand corner, with positive X
values going to the right and positive Y values going down. The relationship between
a ROI and its referenced Act is specified through an ActRelationship of
type "subject" (SUBJ), which must always be present.
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