Select the statement that correctly describes the mechanism of action of contrast media.
A) Contrast media are used to enhance visualization of anatomic structures by influencing tissue radiopacity with different concentrations of iodine.
B) A contrast agent works by having either a higher or lower density than the body tissue being investigated.
C) Contrast media radiopacity is related to its iodine concentration.
D) A contrast agent works by the speed of delivery affecting blood flow and hemodilution.

Question

Quizplus · Accepted Answer

Contrast media are substances used to enhance the visibility of blood vessels,fluid,and other structures.Contrast agent classification is by effect,either positive or negative.A negative contrast agent is a substance with a lower density than the body tissues being investigated (e.g.,carbon dioxide,air).A positive contrast agent has a higher density than the body tissue being investigated (e.g.,iodine-based contrast media,barium sulfate,and gadolinium).

Select the Statement That Correctly Describes the Mechanism of Action