Understanding Ultrasound Physics 4th Edition

0.0(0)
studied byStudied by 0 people
0.0(0)
full-widthCall Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/43

flashcard set

Earn XP

Description and Tags

These flashcards cover key terminology and definitions related to ultrasound physics, useful for exam preparation.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

44 Terms

1
New cards

Ultrasound

Sound waves with frequencies above 20 kHz that are used in medical imaging.

2
New cards

Doppler Effect

Change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.

3
New cards

Frequency

The number of cycles of a wave that occur in a given unit of time, usually expressed in Hertz (Hz).

4
New cards

Amplitude

The maximum extent of a wave's displacement from its mean position, which is related to the intensity of the wave.

5
New cards

Wavelength

The distance between successive peaks or troughs in a wave, which is inversely related to frequency.

6
New cards

Velocity (of sound in tissue)

The speed at which sound waves travel through a medium, typically 1540 m/s in soft tissue.

7
New cards

Impedance

The acoustic resistance to sound traveling in a medium, calculated by multiplying the density of the medium by the propagation speed.

8
New cards

Aliasing

An artifact in Doppler ultrasound that occurs when the detected frequency exceeds the Nyquist limit, causing erroneous velocity representation.

9
New cards

Dynamic Range

The range between the smallest and largest signal strengths that a system can accurately process, often expressed in decibels.

10
New cards

Bioeffects

The effects of ultrasound exposure on living tissues, including potential thermal and mechanical interactions.

11
New cards

Ultrasound

Sound waves with frequencies above 20 kHz that are used in medical imaging.

12
New cards

Doppler Effect

Change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.

13
New cards

Frequency

The number of cycles of a wave that occur in a given unit of time, usually expressed in Hertz (Hz).

14
New cards

Amplitude

The maximum extent of a wave's displacement from its mean position, which is related to the intensity of the wave.

15
New cards

Wavelength

The distance between successive peaks or troughs in a wave, which is inversely related to frequency.

16
New cards

Velocity (of sound in tissue)

The speed at which sound waves travel through a medium, typically 1540 m/s in soft tissue.

17
New cards

Impedance

The acoustic resistance to sound traveling in a medium, calculated by multiplying the density of the medium by the propagation speed.

18
New cards

Aliasing

An artifact in Doppler ultrasound that occurs when the detected frequency exceeds the Nyquist limit, causing erroneous velocity representation.

19
New cards

Dynamic Range

The range between the smallest and largest signal strengths that a system can accurately process, often expressed in decibels.

20
New cards

Bioeffects

The effects of ultrasound exposure on living tissues, including potential thermal and mechanical interactions.

21
New cards

Transducer

A device that converts electrical energy into sound waves and vice versa, used to generate and detect ultrasound waves.

22
New cards

Attenuation

The gradual decrease in intensity of the ultrasound beam as it passes through tissue, due to absorption, reflection, and scattering.

23
New cards

Resolution

The ability of an ultrasound system to distinguish between two adjacent structures, often described as axial (along the beam) or lateral (perpendicular to the beam).

24
New cards

Gain

The electronic amplification of received echoes, allowing the operator to adjust the brightness of the image.

25
New cards

Pulse Repetition Frequency

26
New cards

Ultrasound

Sound waves with frequencies above 20 kHz that are used in medical imaging.

27
New cards

Doppler Effect

Change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.

28
New cards

Frequency

The number of cycles of a wave that occur in a given unit of time, usually expressed in Hertz (Hz).

29
New cards

Amplitude

The maximum extent of a wave's displacement from its mean position, which is related to the intensity of the wave.

30
New cards

Wavelength

The distance between successive peaks or troughs in a wave, which is inversely related to frequency.

31
New cards

Velocity (of sound in tissue)

The speed at which sound waves travel through a medium, typically 1540 m/s in soft tissue.

32
New cards

Impedance

The acoustic resistance to sound traveling in a medium, calculated by multiplying the density of the medium by the propagation speed.

33
New cards

Aliasing

An artifact in Doppler ultrasound that occurs when the detected frequency exceeds the Nyquist limit, causing erroneous velocity representation.

34
New cards

Dynamic Range

The range between the smallest and largest signal strengths that a system can accurately process, often expressed in decibels.

35
New cards

Bioeffects

The effects of ultrasound exposure on living tissues, including potential thermal and mechanical interactions.

36
New cards

Transducer

A device that converts electrical energy into sound waves and vice versa, used to generate and detect ultrasound waves.

37
New cards

Attenuation

The gradual decrease in intensity of the ultrasound beam as it passes through tissue, due to absorption, reflection, and scattering.

38
New cards

Resolution

The ability of an ultrasound system to distinguish between two adjacent structures, often described as axial (along the beam) or lateral (perpendicular to the beam).

39
New cards

Gain

The electronic amplification of received echoes, allowing the operator to adjust the brightness of the image.

40
New cards

Pulse Repetition Frequency (PRF)

The number of ultrasound pulses emitted by the transducer per second, directly related to the maximum depth of imaging.

41
New cards

Pulse Repetition Interval (PRI)

The time from the start of one ultrasound pulse to the start of the next pulse, which is the reciprocal of PRF (PRI = 1/PRF).

42
New cards

Spatial Pulse Length (SPL)

The physical length of an ultrasound pulse in the medium, determined by the number of cycles in the pulse multiplied by the wavelength (SPL = ext{number of cycles} imes ext{wavelength}).

43
New cards

Frame Rate

The number of complete images (frames) displayed per second, impacting the ability to visualize motion in real-time.

44
New cards

Time-Gain Compensation (TGC)

A control that allows for selective amplification of echoes based on their depth of origin, compensating for attenuation differences.