Brainscape's Knowledge GenomeTM

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


See full index

OBGYN 1 > Chapter 2: Sonographic Image Optimization > Flashcards

Chapter 2: Sonographic Image Optimization Flashcards

1
Q

ability of the ultrasound system to display echoes as separate structures parallel to the transmitted beam

A

axial resolution

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

series of 2D images providing a method to display movement

A

cine-loop

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

Doppler data conversion into a nondirectional amplitude color overlay on the grayscale image

A

color power Doppler/ power Doppler

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

Doppler data conversion into a directional velocity color overlay on the grayscale image

A

color Doppler

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

Combination of directional color Doppler and nondirectional amplitude color Doppler modes

A

directional color power angio/ directional power Doppler

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

General term encompassing axial, lateral, spatial, contrast, and temporal resolution

A

image resolution

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

Ability of the ultrasound system to display echoes as separate structures perpendicular to transmitted beam

A

lateral resolution

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

one area, corresponding to the X and Y axis, of the 2D image

A

pixel

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

number of cycles (frequency) of pulses per second

A

PRF

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

numerical measurement

A

quantative

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

Description of quality of components without a numerical component

A

qualitative

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

area of data acquisition for color Doppler information

A

region of interest

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

ability of the ultrasound system to display echoes as separate structures that lie close together

A

spatial resolution

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

ability of the ultrasound system to display events occurring at different times

A

temporal resolution

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

Overall gain adjusts or amplifies the _____ of all the pizels on the system monitor

A

brightness

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

As sound travels through tissue, there is a waveform amplitude _____ because of attenuation

A

reduction

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

TGC allows the adjustment of image by changing areas to

A

darker or brighter

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

A single focal zone carat should be positioned:

A

at or just deep to the imaged structure

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

The best B-mode image uses:

A

the highest frequency that provides an adequate amount of penetration

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

A higher dynamic range is best utilized with:

A

the uterus

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

Narrowing sector width _____ frame rate

A

increases

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

Low persistence improves resolution of:

A

the fetal heart

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

The maps feature adjusts _____ of the grays in an image.

A

brightness

24
Q

Which is not an indicator of thermal index?
a. TIB
b. TIC
c. TIS
d. TIA

A

d

25
Q

Tissue harmonic imaging offers improved image by decreasing all except:
a. side lobes
b. reverberation
c. speckle
d. contrast

A

d

26
Q

This feature uses multiple, averaged transmit beams at different angles and frequencies to increase image detail.

A

compound imaging

27
Q

Sweep Speed adjusts the M-mode scrolling speed or:

A

time

28
Q

Turbulent flow patterns are often associated with:

A

pathologies

29
Q

The optimal angle to sample with color flow is:

A

30 to 60 degrees

30
Q

On a color bar indicator, the black are represents:

A

range of flow velocities displayed above and below the baseline

31
Q

What will aid in detecting slow vascular flow?

A

Increasing persistence

32
Q

This type of artifact occurs when a structure is a strong reflector, such as fetal bony structures, or when a tissue reflects most or all of the transmitted beam

A

posterior acoustic shadowing

33
Q

Movement of the transducer or targeted anatomy results in an artifact called:

A

color flash

34
Q

Evaluation of a cystic structure results in the creation of an area deep into the targeted anatomy appearing:

A

brighter than the adjacent tissue

35
Q

“Slide pots” is another name for

A

potentiometer

36
Q

The control ______ is used when the overall appearance of the image is too bright or too dark

A

overall gain

37
Q

Dynamic range or DR is simply the range of _____ displayed in the B-mode imaging.

A

grays

38
Q

Adding ____ or _____ to an image has the potential to increase structure visualization over black and white coloring.

A

tint or colorize

39
Q

Increasing persistence _____ the frame rate.

A

slows

40
Q

The mechanical index is an indicator of the ________ to tissue with the passing wave.

A

potential damage

41
Q

The M-mode or motion mode tracings provide a graphic display of structures in relation to ____.

A

time

42
Q

If color appears outside of the vessel when using color Doppler gain, it indicates a ____ gain level.

A

high

43
Q

Optimally, the ROI should be no larger than necessary because of the ______ frame rates often associated with a larger color box.

A

decreased

44
Q

From a frame rate perspective, it is better to have a ____ ROI than a ____ ROI.

A

long, wide

45
Q

Changing the “smooth” function adjusts the _____ averaging for flow between color frames.

A

spatial

46
Q

The _____ selection reverses the color display.

A

invert

47
Q

Power Doppler is an alternate method for assessing ____-flow velocities

A

low

48
Q

The ____ function reduces the amount of noise and clutter by suppressing the lower-level signals that are the result of tissue and vessel wall motion.

A

filter

49
Q

The first step in obtaining a quality 3D data set is the optimization of the ____ image.

A

2D

50
Q

Extra beams, located adjacent to the central beam, called ______ create echoes in an incorrect location.

A

grating/side lobes

51
Q

____-mode provides a graphic display of motion in the fetal heart

A

M

52
Q

An image produced with misregistration of sound waves occurs when a structure lies between the transducer and a curved or with an angled strong reflector. It is called _____ or _____.

A

mirror image
ghost image

53
Q

Color power Doppler uses amplitude to create a color _____ of blood flow.

A

overlay

54
Q

The reduction of Doppler aliasing is through adjustment of the _____ or baseline.

A

PRF

55
Q

List the types of Doppler modes

A

continuous wave
pulsed wave
spectral doppler
color doppler
color power angio/ color power doppler/ power doppler
Directional color power angio/ directional color power doppler

OBGYN 1 (18 decks)

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