Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Ultrasound physics > intro to physics > Flashcards

intro to physics Flashcards

1
Q

what is ultrasound

A

imaging method using high frequency sound waves to produce images of structures within the body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the role of an ultrasound tech

A

provide interpretable images for diagnosis for radiologist

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

ultrasound is sound whose frequency is

A

above the range of human hearing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

how is an ultrasound image formed

A

ultrasound energy is transmitted into the patients and internal structures reflect the sound and the returning echoes form the image of structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

diagnostic ultrasound uses frequencies of

A

greater than 1 million Hz ( 1 MHz)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

ALARA

A

“as low as reasonably achievable” (power lowest setting)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

types of transducers

A

linear, convex (curved), sector (phased), endovaginal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

sound bouncing off structures, organs, fluid are called

A

echoes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

anechoic/sonolucent

A

no internal echoes, fluid filled transmits sound easily (black) echogenic walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

echogenic/hyperechoic

A

echo producing structure reflects sound with a brighter intensity (white)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

a structure that is cystic or fluid filled will be

A

sonolucent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

low level echoes within a structure

A

hypoechoic (grey)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

mass has a few low level echoes but is less echogenic than its surroundings

A

echopenic (white)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

completely uniform in texture or composition

A

homogeneous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

not uniform in texture or composition

A

heterogeneous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

having the same echogenicity or brightness as the surrounding structure

A

isoechoic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

sound beam in completely reflected or absorbed by the structure being imaged

A

shadowing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

when the sound beam travels through fluid the echoes behind the fluid are exaggerated or brighter than the normal surrounding tissues

A

posterior enhancement (flashlight effect)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

horizontal axis

A

x axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

vertical axis

A

y axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

two items that are not associated
ie. hair color is ______ to shoe size

A

unrelated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

two items that are associated but have no relationship with each other
ie. Santa is ______ to Christmas

A

related/ proportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

two items that are related when one increases, the other increases
ie. clothing size is _________ to ones weight (LL-UR)

A

directly related/directly proportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

two items that are associated when one increases the other decreases.
ie. grades in school are _________to partying time.

A

inversely related/ inversely proportional
UL-LR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

when two numbers are multiplied together and equal 1. _______ because when one increases the other decreases.

A

reciprocal relationship/ inverse relationship

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what are the three units for numerical values?

A

units of length , area, volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what are the units of length

A

distance or circumference : cm, feet

28
Q

what are the units of volume

A

cm 3, feet 3

29
Q

what are the units of area

A

cm 2, ft 2

30
Q

multiply by that number means to

A

increase by a factor

31
Q

divide by that number means to

A

decrease by a factor

32
Q

number with a positive exponent

A

value greater than 10

33
Q

number with a negative exponent

A

number less than one

34
Q

number with a exponent of zero

A

in a number between 1 and 10

35
Q

if you move the exponent to the left

A

the number on the exponent will me positive

36
Q

if you move the exponent to the right

A

the number on the exponent will be negative

37
Q

L - R +

A

standard notation

38
Q

L + R -

A

scientific notation

39
Q

period and frequency are

A

reciprocals, one increases the other decreases

40
Q

metric system cheat

A

king henry died drinking cold milk
get me my nano

41
Q

if its a metric prefix if the number gets larger the number must decrease

A
42
Q

in a metric prefix if the number gets smaller the number must increase

A
43
Q

the transducer creates ____ and its travels through _______

A

sound pulses , biological tissue media

44
Q

waves carry what

A

energy

45
Q

what are the different forms of waves

A

heat, sound, magnetic, light

46
Q

sound wave is a

A

mechanical longitudinal wave

47
Q

a sound wave needs to travel through a medium that is ______ and can be _______

A

compressed, rarefied

48
Q

the effects of the medium upon the sound wave

A

acoustic propagation properties

49
Q

the effects of the sound wave upon the biologic tissue 6

A

biologic effects

50
Q

acoustic variables of sound waves

A

pressure, density, distance

51
Q

concentration of force in an area

A

pressure (Pa, pascals)

52
Q

concentration of mass in a volume

A

Density (kg/cm^3)

53
Q

Measure of particle motion

A

Distance (cm, mm, ft, mile)

54
Q

used to describe the features of the sound wave

A

acoustic parameters

55
Q

what are the seven acoustic parameters

A

Power, Frequency , Amplitude, Propagation speed, Intensity, Wavelength, Period

56
Q

wave that moves left to right and particles move up and down

A

transverse wave

57
Q

particles that move in the same direction that the wave propagates

A

longitudinal wave

58
Q

In step wave, peak and trough same time and place

A

in phase wave

59
Q

out of step wave peak and trough different time and place

A

out of phase wave

60
Q

the combination of multiple sound beams

A

interference

61
Q

there are two types of interference

A

constructive and destructive

62
Q

formation of a single wave with a bigger amplitude that either of components

A

constructive interphase

63
Q

formation of a single wave that results in lesser amplitude than one of the waves

A

destructive interference

64
Q

two out of phase waves are of equal amplitude

A

complete destructive interference cancel each other out

65
Q

frequencies of waves differ both in phase and out of phase

A

both constructive and destructive interference

Ultrasound physics (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions