NCIt definition : Any nuclear medicine study that utilizes a radioactive tracer to image blood vessels
or characterize blood flow.;
Alternative definition : CDISC: The X-ray examination of blood vessels or chambers of the heart after introduction
of a radiopaque substance.; NCI-GLOSS: A procedure to x-ray blood vessels. The blood vessels can be seen because
of an injection of a dye that shows up in the x-ray.;