Relationships

Question 1

Stiffness increases, prop speed?

Answer 1

Increases

Question 2

Density increases, prop speed?

Answer 2

Decreases

Question 3

Frequency increases, wavelength?

Answer 3

Decreases

Question 4

Frequency decreases, wavelength?

Answer 4

Increases

Question 5

Power is proportional to amplitude?

Answer 5

Squared

Question 6

Intensity is proportional to?

Answer 6

Power

Question 7

Intensity is proportional to amplitude?

Answer 7

Squared

Question 8

If depth increases then PRF?

Answer 8

Decreases

Question 9

If depth decreases then PRF?

Answer 9

Increases

Question 10

The greater the impedance mismatch, the __________ the return echo.

Answer 10

Stronger

Question 11

If depth increases then PRP?

Answer 11

Increases

Question 12

If depth decreases then PRP?

Answer 12

Decreases

Question 13

If PRF increases then, PRP?

Answer 13

Decreases

Question 14

If PRP increases then PRF?

Answer 14

Decreases

Question 15

If PRP increases then DF?

Answer 15

Decreases

Question 16

If PD increases then DF?

Answer 16

Increases

Question 17

Period, frequency, amplitude, intensity and power are determined by?

Answer 17

Sound source (transducer)

Question 18

Propagation speed and impedance are determined by?

Answer 18

The medium

Question 19

Wavelength is determined by?

Answer 19

The sound source and the medium

Question 20

Spatial pulse length is determined by?

Answer 20

The sound source and the medium

Question 21

PD, DF, PRP and PRF are determined by?

Answer 21

The sound source

Question 22

If frequency increases, then attenuation?

Answer 22

Increases

Question 23

Angle of reflection equals

Answer 23

Angle of incidence

Question 24

If prop speed of medium 2 is less than prop speed of medium 1 then the angle of transmission will be?

Answer 24

Less than the angle of incidence

Question 25

If prop speed of medium 1 is less than prop speed of medium 2 then the angle of transmission will be?

Answer 25

Greater than the angle of incidence

Question 26

Intensities from lowest to highest

Answer 26

``` SATA ( lowest) SPTA SAPA SPPA SATP SPTP (highest) ```

Question 27

If power is halved then intensity is?

Answer 27

Halved

Question 28

Adding damping to transducer _______ the SPL.

Answer 28

Reduces

Question 29

If more damping occurs the axial resolution?

Answer 29

Increases

Question 30

A decrease in SPL causes axial resolution to?

Answer 30

Increase

Question 31

Axial resolution is worsened when the SPL is

Answer 31

Longer

Question 32

Thicker crystal produces a __________ frequency.

Answer 32

Lower

Question 33

High frequency transducers have _________ crystals

Answer 33

Thinner

Question 34

If there is more damping material in a transducer, the sensitivity of that transducer is?

Answer 34

Decreased

Question 35

Wider bandwidth means:

Answer 35

Better image quality

Question 36

Low Q factor means a ________ bandwidth

Answer 36

Wide

Question 37

Low Q factor makes axial resolution?

Answer 37

Better

Question 38

Decreased bandwidth means an _________ Q factor and _______ axial resolution.

Answer 38

High | Poor

Question 39

Higher frequency transducers, ________ axial resolution

Answer 39

Better

Question 40

The better the axial resolution, the lower it’s :

Answer 40

Numerical value

Question 41

Larger aperture will result in a ______ near zone length

Answer 41

Longer

Question 42

Longer near zone length will have _______ divergence in the far field

Answer 42

Less

Question 43

At the distance of one NZL, the beam diameter is equal to:

Answer 43

1/2 the diameter of the element

Question 44

At a distance of 2 NZLs the beam diameter is equal to

Answer 44

The element diameter

Question 45

If the frame rate decreases, the temporal resolution?

Answer 45

Decreases

Question 46

Higher the PRF, _________ the frame rate

Answer 46

Higher

Question 47

Increased depth causes the frame rate to?

Answer 47

Decrease

Question 48

More focal zones cause _________ frame rate

Answer 48

Slower

Question 49

Wider image has more lines, causing the frame rate to

Answer 49

Decrease

Question 50

More scan lines mean _________ temporal res

Answer 50

Worse

Question 51

Higher frequencies produce ________ NZLs

Answer 51

Longer

Question 52

Compression increases, dynamic range?

Answer 52

Decreases

Question 53

If pixels are increased then spatial resolution?

Answer 53

Is improved

Question 54

If prop speed is slower than 1540 m/s then the reflector will appear?

Answer 54

Too far away

Question 55

If the prop speed is faster than 1540 m/s then the the reflector will be displayed?

Answer 55

Too close

Question 56

If the difference in the pressure gradient increases, then the flow?

Answer 56

Increases

Question 57

If area of vessel decreases velocity must?

Answer 57

Increase because volume of blood flow is constant

Question 58

Increase in velocity corresponds with a ___________ pressure

Answer 58

Decrease

Question 59

How would an increase in length affect flow?

Answer 59

Decreases

Question 60

How would an increase in radius affect flow?

Answer 60

Increases it to the fourth power

Question 61

If viscosity of blood increases then flow?

Answer 61

Decreases

Question 62

75% decrease in area corresponds to a _____ decrease in diameter

Answer 62

50%

Question 63

Signal to noise ratio improves with _________ in output power.

Answer 63

Increase

Question 64

Density increases, prop speed?

Answer 64

Decreases

Question 65

Density doubles, stiffness _________ to maintain same impedance

Answer 65

Halves

Question 66

If power is increased and beam area is unchanged, what happens to intensity?

Answer 66

Increases

Question 67

If power is unchanged but beam area is doubled then what happens to intensity?

Answer 67

It’s halved

Question 68

Lower frequency causes _________ pulse duration.

Answer 68

Longer because period is longer