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1
Q

Stiffness increases, prop speed?

A

Increases

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2
Q

Density increases, prop speed?

A

Decreases

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3
Q

Frequency increases, wavelength?

A

Decreases

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4
Q

Frequency decreases, wavelength?

A

Increases

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5
Q

Power is proportional to amplitude?

A

Squared

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6
Q

Intensity is proportional to?

A

Power

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7
Q

Intensity is proportional to amplitude?

A

Squared

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8
Q

If depth increases then PRF?

A

Decreases

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9
Q

If depth decreases then PRF?

A

Increases

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10
Q

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

A

Stronger

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11
Q

If depth increases then PRP?

A

Increases

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12
Q

If depth decreases then PRP?

A

Decreases

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13
Q

If PRF increases then, PRP?

A

Decreases

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14
Q

If PRP increases then PRF?

A

Decreases

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15
Q

If PRP increases then DF?

A

Decreases

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16
Q

If PD increases then DF?

A

Increases

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17
Q

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

A

Sound source (transducer)

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18
Q

Propagation speed and impedance are determined by?

A

The medium

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19
Q

Wavelength is determined by?

A

The sound source and the medium

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20
Q

Spatial pulse length is determined by?

A

The sound source and the medium

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21
Q

PD, DF, PRP and PRF are determined by?

A

The sound source

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22
Q

If frequency increases, then attenuation?

A

Increases

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23
Q

Angle of reflection equals

A

Angle of incidence

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24
Q

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

A

Less than the angle of incidence

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25
Q

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

A

Greater than the angle of incidence

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26
Q

Intensities from lowest to highest

A 
SATA ( lowest)
SPTA
SAPA
SPPA
SATP
SPTP (highest)
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27
Q

If power is halved then intensity is?

A

Halved

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28
Q

Adding damping to transducer _______ the SPL.

29
Q

If more damping occurs the axial resolution?

30
Q

A decrease in SPL causes axial resolution to?

31
Q

Axial resolution is worsened when the SPL is

32
Q

Thicker crystal produces a __________ frequency.

33
Q

High frequency transducers have _________ crystals

34
Q

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

35
Q

Wider bandwidth means:

A

Better image quality

36
Q

Low Q factor means a ________ bandwidth

37
Q

Low Q factor makes axial resolution?

38
Q

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

39
Q

Higher frequency transducers, ________ axial resolution

40
Q

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

A

Numerical value

41
Q

Larger aperture will result in a ______ near zone length

42
Q

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

43
Q

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

A

1/2 the diameter of the element

44
Q

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

A

The element diameter

45
Q

If the frame rate decreases, the temporal resolution?

46
Q

Higher the PRF, _________ the frame rate

47
Q

Increased depth causes the frame rate to?

48
Q

More focal zones cause _________ frame rate

49
Q

Wider image has more lines, causing the frame rate to

50
Q

More scan lines mean _________ temporal res

51
Q

Higher frequencies produce ________ NZLs

52
Q

Compression increases, dynamic range?

53
Q

If pixels are increased then spatial resolution?

A

Is improved

54
Q

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

A

Too far away

55
Q

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

56
Q

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

57
Q

If area of vessel decreases velocity must?

A

Increase because volume of blood flow is constant

58
Q

Increase in velocity corresponds with a ___________ pressure

59
Q

How would an increase in length affect flow?

60
Q

How would an increase in radius affect flow?

A

Increases it to the fourth power

61
Q

If viscosity of blood increases then flow?

62
Q

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

63
Q

Signal to noise ratio improves with _________ in output power.

64
Q

Density increases, prop speed?

65
Q

Density doubles, stiffness _________ to maintain same impedance

66
Q

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

67
Q

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

A

It’s halved

68
Q

Lower frequency causes _________ pulse duration.

A

Longer because period is longer

Physics (7 decks)

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