Radiology, Vol 156, 811-815, Copyright © 1985 by Radiological Society of North America
Digital subtraction angiography systems: assessing performance with phantoms
MM Goodsitt, L Abbate and JR Hesselink
A solid, acrylic phantom was developed to assess the iodine perceptibility
of three digital subtraction angiography (DSA) systems, including one using
a recursive filter technique. Three phantoms, designed to mimic flow of
iodinated boluses through blood vessels, were used. Each contained four
triangular boluses of different widths and of a specific iodine
concentration. Motion, required to test recursively filtered DSA systems,
was simulated by placing the phantoms on a motorized cart. The phantoms
were also used to test flow curve generation in applicable systems.
Intersystem differences in perceptibility were attributed to differences in
system noise, system resolution, and dynamic range. Flow curves produced
with the phantoms were similar to those obtained in patient studies.
