Brainscape's Knowledge GenomeTM

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


See full index

Physics written assignments > Kremkau Chapter 3 Key Terms > Flashcards

Kremkau Chapter 3 Key Terms Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Physics flashcards Physics 101 flashcards
1
Q

Aperature

A

size of a transducer element or group of elements.

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

Apodization

A

nonuniform driving of elements in an array to reduce grating lobes

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

Array

A

a transducer assembly containing several piezoelectric elements

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

Axial

A

in the direction of the transducer axis

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

Axial Resolution

A

the minimum reflector separation along the sound path that is required to produce separate echoes

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

Beam

A

region containing continuous wave sound; region through which a sound pulse propagates.

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

Composite

A

combination of a piezoelectric ceramic and a nonpiezoelectric polymer

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

Convex Array

A

curved linear array

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

Crystal

A

element

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

Curie Point

A

temperature at which an element material loses its piezoelectric properties

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

Damping

A

material attached to the rear face of a transducer element to reduce pulse duration; the process of pulse duration reduction.

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

Detail Resolution

A

the ability to image fine detail and to distinguish closely spaced reflectors

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

Disk

A

a thin, flat, circular object.

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

Dynamic aperature

A

aperature that increases with increasing focal length

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

dynamic focusing

A

continuously variable reception focusing that allows the increasing depth of the transmitted pulse as it travels.

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

Element

A

the piezoelectric component of a transducer assembly

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

Elevational Resolution

A

the detail resolution in the direction perpendicular to the scan plane. it is equal to the section thickness and is the source of section thickness artifact.

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

Far zone

A

the region of a sound beam in which the beam diameter increases as the distance from the transducer increases. aka far field

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

Focal length

A

distance from a focused transducer to the center of a focal region or to the location of the spatial peak intensity

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

Focal region

A

region of minimum beam diameter and area

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

Focal zone

A

length of the focal region

22
Q

Focus

A

the concentration of the sound beam into a smaller beam area than would exist otherwise

23
Q

Grating lobes

A

additional weaker beams of sound traveling out in directions different from the primary beam as a result of the multi element structure of transducer arrays

24
Q

Lateral

A

perpendicular to the direction of sound travel

25
Q

Lateral Resolution

A

minimum reflector separation perpendicular to the sound path that is required to produce separate echoes.

26
Q

Lead zirconate titanate

A

a ceramic piezoelectric material . PZT

27
Q

Lens

A

a curved material that focuses a sound or light beam

28
Q

Linear

A

adjectival form of line

29
Q

Linear array

A

array made of rectangular elements arranged in a straight line

30
Q

Linear phased array

A

linear array operated by applying voltage pulses to all elements, but with small time differences to direct ultrasound pulses out in various directions.

31
Q

Linear sequenced array

A

linear array operated by applying voltage pulses to groups of elements sequentially

32
Q

Matching layer

A

material attached to the front face of a transducer element to reduce the reflections at the transducer surface

33
Q

Natural Focus

A

the narrowing of a sound beam that occurs with an unfocused flat transducer element.

34
Q

Near zone

A

the region of a sound beam in which the beam diameter decreases as the distance from the transducer increases; also called near field

35
Q

Operating frequency

A

preferred frequency of operation of a transducer

36
Q

Phased array

A

an array that steers and focuses the beam electronically

37
Q

Phased linear array

A

linear sequenced array with phased focusing added; linear sequenced array with phased steering of pulses to produce a parallelogram shaped display

38
Q

Piezoelectricity

A

conversion of pressure to electric voltage

39
Q

Probe

A

transducer assembly

40
Q

Resolution

A

the ability to distinguish echoes in terms of space, time, or strength.

41
Q

Resonance frequency

A

operating frequency

42
Q

Scanhead

A

transducer assembly

43
Q

Sector

A

a geometric figure bounded by two radii and the arc of the circle included between them

44
Q

Sensitivity

A

ability of an imaging system to detect weak echoes.

45
Q

Side lobes

A

weaker beams of sound traveling out from a single element in directions different from those of the primary beam.

46
Q

Sound beam

A

the region of a medium that contains virtually all of the sound produced by a transducer.

47
Q

Source

A

an emitter of ultrasound; transducer

48
Q

Transducer

A

a device that converts energy from one form to another

49
Q

Transducer assembly

A

Transducer elements with damping and matching materials assembled in a case.

50
Q

ultrasound transducer

A

a device that converts electric energy to ultrasound energy, and vice verse

51
Q

Vector array

A

linear sequenced array that emits pulses from different starting points and from different directions

Physics written assignments (7 decks)

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