The Use of Contrast Material as a Means for Visualizing

question 13

Multiple Choice

The use of contrast material as a means for visualizing human anatomy has a long history.Regardless of the type of contrast media,the purpose for using contrast media is to

• A)increase patient radiation dose and improve image quality.
• B)enhance the low subject contrast of anatomic structures.
• C)increase metabolism of the kidneys and liver.
• D)improve the contrast between high contrast structures such as bone.

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Definitions:

Delta Waves

Slow brainwaves predominantly seen in deep sleep that are associated with healing, dreaming, and detached awareness.

NREM-3 (N3)

A stage of sleep that is deep and restorative, during which it is difficult to awaken someone; also known as slow-wave sleep.

Alpha Waves

Brainwaves detected by an EEG that are associated with a state of wakeful relaxation, typically present when a person's eyes are closed but they are awake.

Delta Waves

Are the slowest type of brainwave, primarily associated with deep sleep and aid in healing and regeneration within the body.