Brainscape's Knowledge GenomeTM

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


See full index

UTZ > Intro to UTZ > Flashcards

Intro to UTZ Flashcards

1
Q

Speed of sound

A

1540 m/s

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

Speed of sound

A

154,000 cm/s

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

Speed of sound

A

1.54 mm/us

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

High compressible medium

A

Low speed of sound

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

Less compressible mediumq

A

High speed of sound

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

Less dense medium

A

High speed of sound

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

More dense medium

A

Low speed of sound

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

Average speed: Soft tissue

A

1540 m/s

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

Ave. speed: fatty tissue

A

1450 m/s

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

ave. speed: air

A

300 m/s

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

Term that describes the sound waves of frequencies exceeding the range of human hearing and their propagation in a medium

A

Ultrasound

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

Purpose: UTZ

A

used to scan body tissues

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

Purpose: UTZ

A

Acquisition and display of the acoustic properties of tissues

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

UTZ: frequency range

A

20, 000 Hz (20kHz)

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

SONAR (Sound Navigation and ranging)

A

1918

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

Water bath immersion technique

A

Early 50’s

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

First contact compound B-scanner

A

Late 50’s

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

Grayscale imaging

A

1970

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

Real time imaging

A

Mid 70’s

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

Doppler technique

A

1980

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

number of times waves oscillates thru one cycle each seconds

A

Frequency (f)

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

Frequency expressed as ____

A

cycles / seconds

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

Frequency measured in ____

A

Hz (Hertz)

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

15-20, 000 Hz

A

Audible sound

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

2-10 kHz

A

Medical UTZ

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

50 MHz

A

Specialized UTZ

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

less than 15 MHz

A

infrasound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

The time taken for one complete cycle to occur

A

Period (T)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Period measured in ___

A

s or us

30
Q

maximum displacement that occurs in an acoustic variable

A

Amplitude

31
Q

Period and frequency = ?

A

Inversely proportional

32
Q

Frequency and wavelength = ?

A

Inversely proportional

33
Q

generates ultrasound waves

A

Piezoelectric crystals

34
Q

converts electrical energy to mechanical energy

A

as transmitter of sound

35
Q

converts mechanical energy to electrical energy

A

as receiver of sound

36
Q

small crystal diameter = ?

A

increases beam divergence

37
Q

Large crystal diameter = ?

A

decreases beam divergence

38
Q

The display of the processed information from the receiver vs. time

A

A-mode (amplitude)

39
Q

Echoes are shows as peaks and the distance b/n various structures

A

A-mode

40
Q

Used to build 2D B-mode image

A

A-mode

41
Q

The electronic conversion of A-mode

A

B-mode (Brightness)

42
Q

Shows all the tissue traverse by the UTZ scan

A

B-mode

43
Q

2D images w/c the echo amplitude is depicted as dots of different brightness

A

B-mode

44
Q

Used for M-mode and 2D grayscale imaging

A

B-Mode

45
Q

Displays the motion by showing images of the part of the body under the transducer as it is being scanned

A

Real time

46
Q

Shows movement on the monitor as it occurs

A

Real-time

47
Q

Multiple B-mode images are watched in rapid sequences

A

Real-time

48
Q

A technique that uses B-mode information to display echoes from a moving organs

A

M-mode

49
Q

Provide excellent temporal resolution of motion patterns

A

M-mode

50
Q

Most commonly used for Cardiac UTZ

A

M-mode

51
Q

demo and measures blood flow

A

Doupler UTZ

52
Q

change in the apparent frequency of a wave as a result of relative motion b/n the observer and the source

A

Doppler effect

53
Q

The difference b/n the transmitted and received frequencies is ___ to speed w/ which the reflector is moving away or approaching the transmitter

A

proportional

54
Q

reflected echoes are the SAME as the transmitted waves

A

Stationary reflector

55
Q

reflected echoes are HIGHER than transmitted echoes

A

moving reflector TOWARDS transmitter

56
Q

reflected echoes are LOWER than transmitted echoes

A

Moving reflector AWAY from the transmitted echoes

57
Q

UTZ waves propagates as ___

A

longitudinal waves

58
Q

length of a single cycle of the UTZ wave

A

Wavelength

59
Q

determines the resolution of the scanner

A

wavelength

60
Q

Shorter wavelength = ?

A

High frequency

61
Q

Shorter wavelength = ?

A

better resolution

62
Q

Shorter wavelength = ?

A

clearer image

63
Q

Shorter wavelength = ?

A

more details on the screen

64
Q

Longer wavelength =?

A

Lower frequency

65
Q

Longer wavelength =?

A

poor resolution

66
Q

Longer wavelength =?

A

blurry image

67
Q

Longer wavelength =?

A

few details on the screen

68
Q

done by TGC amplifier

A

Amplification

69
Q

Used to compensate for UTZ attenuation in any part of the body

A

Amplification

70
Q

Used to improve quality of the final image

A

Amplification

71
Q

Weak echoes

A

Deeper structures

72
Q

Strong echoes

A

Superficial structures

UTZ (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions