When the same nonuniformity is back-projected at each of the angles of acquisition, the result is

Question

Quizplus · Accepted Answer

A circular, or ring, artifact results when the same nonuniformity is back-projected at each of the angles of acquisition.The higher the acquired counts for that slice, the more prominent the artifact, because it rides above the random noise error.Also, the closer the local nonuniformity to the axis of rotation, the higher the amplitude of the artifact, because the back-projected lines are closer together (there is more overlapping of count values).

When the Same Nonuniformity Is Back-Projected at Each of the Angles