Next

Question 1

1Hz is equal to..

Answer 1

1 cycle/second

Question 2

1kHz is equivalent to..

Answer 2

1000 cycle/second

Question 3

1MHz is equivalent to

Answer 3

1,000,000 cycle/second

Question 4

It Travels parallel to the line of propagation producing longitudinal waves.

Answer 4

Ultrasound

Question 5

It Travels in a straight line.

Answer 5

Ultrasound

Question 6

It is a concentration of force within an area

Answer 6

Pressure (Pascals/Pa)

Question 7

Units of Pressure

Answer 7

Pascals or Pa

Question 8

It is a concentration of mass within a volume

Answer 8

Density (kg/cm3)

Question 9

Measure of particle motion

Answer 9

Distance (cm, feet, miles)

Question 10

Unit of Density

Answer 10

kg/cm3

Question 11

Units of Distance

Answer 11

cm, feet, miles

Question 12

A particles move back and forth in the same as wave

Answer 12

Longitudinal Waves

Question 13

A particle moves in a perpendicular direction (right angles or 90 degrees) to the direction of the waves

Answer 13

Transverse Waves

Question 14

The particles closest together

Answer 14

Compression

Question 15

The particles farthest together

Answer 15

Rarefaction

Question 16

____________ is dependent on the type of tissue the sound wave is traveling through.

Answer 16

Attenuation

Question 17

As the ultrasound beam travels through the body it loses energy.

Answer 17

Attenuation

Question 18

What are the different interactions of soundwaves?

Answer 18

Absorption
Reflection
Scattering
Refraction
Divergence / Diffraction

Question 19

Also known as Backscatter

Answer 19

Reflection

Question 20

The higher the frequency of the soundwave, the greater the amount of absorption that will occur.

Answer 20

Absorption

Question 21

The energy is transferred from the soundwave into the medium through which it is travelling.

Answer 21

Absorption

Question 22

The main factor causing attenuation of the ultrasound beam.

Answer 22

Absorption

Question 23

THE ENERGY IS REFLECTED BACK FROM AN INTERFACE I.S KNOWN AS ECHO

Answer 23

Reflection

Question 24

ThePOSTERIORSHADOWINGcaused by BOWEL GAS often leads to ______________________of certain organs

Answer 24

Non Visualization

Question 25

This normally happens to BONES and STONES

Answer 25

Shadow

Question 26

The wavelength shortens if the velocity is decreased, and vice versa.

Answer 26

Refraction

Question 27

Refers to the change in the direction of an ultrasound beam when moving between two tissues that have different speeds of sound (acoustic velocities)

Answer 27

Refraction

Question 28

It can cause artifacts.

Answer 28

Refraction

Question 29

REDIRECTIONOFACOUSTIC ENERGY IN NUMEROUS DIRECTION

Answer 29

Scattering

Question 30

WEAK SIGNALS =

Answer 30

White ultrasound image impression

Question 31

The ultrasound waves diverges (spreads out) as it moves away from the source

Answer 31

Diffraction

Question 32

It is determined by the relationship between the width of the source (aperture) and the wavelength of the wave.

Answer 32

DIFFRACTION

Question 33

Echogenicity: White

Answer 33

hyperechoic

Question 34

Echogenicity: Light Gray

Answer 34

Isoechoic

Question 35

Echogenicity: Dark Gray

Answer 35

Hypoechoic

Question 36

Echogenicity: Black or Dark

Answer 36

Anechoic