Unit 6 - Ultrasound Equipment

Question 1

A ________ is simply a pressure wave that travels in a longitudinal wave

Answer 1

Sound

Question 2

_________ forms the peak of the sound wave

Answer 2

Compression

Question 3

_________ forms the trough of the sound wave

Answer 3

Rarefaction

Question 4

_________ is a measure of pitch

Answer 4

Frequency

Question 5

___________ is the distance btw 2 identical points on adjacent cycles

Answer 5

Wavelength

Question 6

Higher frequencies produce _________ wavelengths & lower frequencies produce ________ wavelengths

Answer 6

Shorter

Longer

Question 7

_________ represents the sound’s loudness

Answer 7

Amplitude

Question 8

Sound propagates through _____ tissue @ 1540m/sec, ______ @ 343m/sec, & _______ @ 3000-5000m/sec

Answer 8

Soft tissue

air

bone

Question 9

A _________ material can transduce electric energy to mechanical energy and vise versa

Answer 9

Piezoelectric

Question 10

The ultrasound transducer emits ultrasound waves into the body at a ________ rate

Answer 10

fixed

Question 11

The brighness of the ultrasound image is determined by the ___________

Answer 11

amplitude

Question 12

Hyperechoic structures appear _________

Answer 12

bright

Question 13

Hypoechoic structures appear _________

Answer 13

dark shade of grey

Question 14

Anechoic structures appear _________

Answer 14

black

Question 15

Vascular stuctures appear __________

Answer 15

Anechoic (black)

Question 16

Proximal peripheral nerves tend to appear _________

Answer 16

Anechoic

Question 17

Distal peripheral nerves tend to appear _________

Answer 17

Hyperechoic w/ honeycomb appearance

Question 18

___________ is the ability to see 2 separate things as 2 separate things

Answer 18

Resolution

Question 19

An ultrasound beam exists in ____ different demensions

Answer 19

3

Question 20

(t/f): ultrasound beams leaving the transducer travel in a straight line from the probe

Answer 20

False

they converge at a point known as the “focal zone” then diverge

Question 21

The _______ zone is the region where the ultrasound beam is the narrowest

Answer 21

Focal zone

Question 22

The region btw the transducer and the focal zone is called the _______ zone, or the Fresnel zone

Answer 22

near zone

Question 23

The region beyond the focal zone is called the _______ zone

Answer 23

far zone

Question 24

Reduced image quality resulting from decreasing strength of the ultrasound beam & sound waves not returning to the ultrasound probe is called __________

Answer 24

Attenuation

Question 25

A _____-axis view looks at a structure in a cross-section

Answer 25

short-axis

Question 26

A _____-axis view looks at a structure along it’s length

Answer 26

long-axis

Question 27

Do lower frequency probes allow for deeper penitration or higher image quality?

Answer 27

Deeper penetration

Question 28

Do higher frequency probes allow for deeper penitration or higher image quality?

Answer 28

Higher image quality

Question 29

What is the most narrow array probe called?

Answer 29

Phased array

Question 30

What is the widest array probe called?

Answer 30

Curvilinear probe