Module 9

Question 1

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

mechanical
electromagnetic
solar
spectral

Answer 1

mechanical

Question 2

Waves that move through fluid are always _______ waves.

transverse
oblique
longitudinal
ascending

Answer 2

longitudinal

Question 3

_________ 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

Answer 3

rarefraction

Question 4

The propagation speed primarily is determined by the ________.

acoustic intensity
medium
temperature
frequency

Answer 4

medium

Question 5

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

elasticity
stiffness
frequency
density

Answer 5

stiffness

Question 6

Propagation speed is equal to frequency times ________.

wavelength
amplitude
density
temperature

Answer 6

wavelength

Question 7

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

Answer 7

1 & 3

Question 8

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

Answer 8

2 & 3

Question 9

A benign cyst typically is _______ with ________.

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

Answer 9

anechoic; posterior acoustic enhancement

Question 10

Benign tumors usually demonstrate a _______ type of echo texture.

homogeneous
heterogeneous
spiculated
mixed

Answer 10

homogeneous

Question 11

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

Answer 11

1, 2, & 3

Question 12

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

Answer 12

locate small arteries adjacent to a tumor