Positive contrast agents
A)have high atomic numbers.
B)appear white on radiographs because of the degree of attenuation.
C)have a tendency to absorb x-ray photon energy to a great extent.
D)All of the above are correct.

Question

Quizplus · Accepted Answer

X-ray photons are absorbed by radiopaque contrast media because these media are opaque to x-rays.Because the anatomic areas filled by these agents appear light (decreased density)on radiographs,they are also called positive contrast agents.These media are composed of elements with high atomic numbers.

Positive Contrast Agents