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Flashcards in Module 9 Deck (12)
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1
Q

The type of wave that needs a medium to travel through in order to transport energy is called a ________ wave.

mechanical
electromagnetic
solar
spectral

A

mechanical

2
Q

Waves that move through fluid are always _______ waves.

transverse
oblique
longitudinal
ascending

A

longitudinal

3
Q

_________ is the term used to describe molecules returning to their resting position after a sound wave causes them to move closer together.

compression
rarefraction
amplitude
frequency

A

rarefraction

4
Q

The propagation speed primarily is determined by the ________.

acoustic intensity
medium
temperature
frequency

A

medium

5
Q

The resistance of molecules to the energy exerted on them is ________.

elasticity
stiffness
frequency
density

A

stiffness

6
Q

Propagation speed is equal to frequency times ________.

wavelength
amplitude
density
temperature

A

wavelength

7
Q

The crystals used in ultrasound must be:

  1. capable of producing a sound wave
  2. able to process an incoming electrical signal
  3. made of ceramic materials

1 & 2
1 & 3
2 & 3
1, 2, & 3

A

1 & 3

8
Q

Sonography should be used as the primary tool to investigate palpable masses in women who:

  1. have fatty breast tissue
  2. are younger than 30 years old
  3. are lactating

1 & 2
1 & 3
2 & 3
1, 2, & 3

A

2 & 3

9
Q

A benign cyst typically is _______ with ________.

hypoechoic; posterior acoustic enhancement
anechoic; posterior acoustic enhancement
hypoechoic; a halo
anechoic; a halo

A

anechoic; posterior acoustic enhancement

10
Q

Benign tumors usually demonstrate a _______ type of echo texture.

homogeneous
heterogeneous
spiculated
mixed

A

homogeneous

11
Q

Intramammary lymph nodes can appear on sonograms:

  1. if they become enlarged.
  2. as oval and parallel to the chest wall.
  3. with some posterior acoustic shadowing, particularly at the edges.

1 & 2
1 & 3
2 & 3
1, 2, & 3

A

1, 2, & 3

12
Q

The most beneficial use of color and power Doppler is to:

locate small arteries adjacent to a tumor
differentiate malignant from benign tumors
stage a known malignancy
identify the border of a benign lesion

A

locate small arteries adjacent to a tumor