#### Study sets matching "ultrasound physics"

#### Study sets matching "ultrasound physics"

A-mode

M-Mode

Frame rate

Vector

The following image depicts:

This display mode displays Time on the X-axis and Depth on th…

The complete sequence of firing all the crystals of the array…

The trapezoidal image shape is formed by the following transd…

A-mode

The following image depicts:

M-Mode

This display mode displays Time on the X-axis and Depth on th…

What does a shorter wavelength equate…

What is the range where ultrasound wav…

What is a period?

What is a wavelength?

A higher frequency.

From 6 to 13 megaHz

It is the time it takes for one wavelength to pass.

It is a measurement from one point to one point (Lambda)

What does a shorter wavelength equate…

A higher frequency.

What is the range where ultrasound wav…

From 6 to 13 megaHz

Unrelated

Related or proportional

Directly Related

Inversely Related

Two items that are not associated.

Two items that are associated or affiliated.

Two items that are associated such that when one item increas…

Two items are associated such that when one item increases, t…

Unrelated

Two items that are not associated.

Related or proportional

Two items that are associated or affiliated.

-Created by a vibrating source, carrie…

Acoustic variables (aka wave variables…

Back and forth particle motion is ____…

Waves move matter but carry____________

Sound

Pressure, density, temperature, particle motion

Parallel

Energy

-Created by a vibrating source, carrie…

Sound

Acoustic variables (aka wave variables…

Pressure, density, temperature, particle motion

area prep

SONAR

physics of ultrasound

physical properties

find what works for you; trough to lay back on, head towards…

sound navigation and ranging; medical use in 1950's, vets in…

sound goes in, sound comes out (echo), computer generates an…

concept of a sound wave: velocity, frequency, wavelength, amp…

area prep

find what works for you; trough to lay back on, head towards…

SONAR

sound navigation and ranging; medical use in 1950's, vets in…

Logarithm or log

Decibel

Decibel notation

Two densities required for decibels

Method of rating numbers. ___ of a number represents the numb…

Common unit for measuring electrical signal strength and the…

*A relative measurement (changes)... *A comparison... *A ratio (mea…

Reference (starting level) and actual level at the time of me…

Logarithm or log

Method of rating numbers. ___ of a number represents the numb…

Decibel

Common unit for measuring electrical signal strength and the…

Intensity

Spatial pulse length

Power

Power-equation

Concentration of the power of the sound beam... Power (watts)... _…

# of cycles X wavelength (mm)

Is proportional to the waves amplitude squared ... Measured in…

If the amplitude is doubled, the power is increased by 4.... 1+…

Intensity

Concentration of the power of the sound beam... Power (watts)... _…

Spatial pulse length

# of cycles X wavelength (mm)

graphs

horizontal line

vertical axis

related or proportional relationships

a diaphragm or a curve representing data and relationships be…

x- axis

y- axis

the presence of association or relationship between two items

graphs

a diaphragm or a curve representing data and relationships be…

horizontal line

x- axis

Frame Rate

unit of frame rate

frame rate determined by

temporal resolution

system's ability to create numerous frames each second

hertz, images per second

sound's speed in medium and depth

accuracy in time

Frame Rate

system's ability to create numerous frames each second

unit of frame rate

hertz, images per second

Express these in scientific notation:…

If you move the decimal to the left wi…

Commonly used frequency on us prode is…

Speed of sound in tissue is one of the…

-5.8*10^6... -3.5*10^-3... -2.6*10^2... -7.9*10^-7... -5.7*10^1

Left- positive ... Right-Negative

-5*10^6Hz... -5*10^3kHz... -5*10^9mHz... -5*10^12 uHz

d) 0.154 cm/usec

Express these in scientific notation:…

-5.8*10^6... -3.5*10^-3... -2.6*10^2... -7.9*10^-7... -5.7*10^1

If you move the decimal to the left wi…

Left- positive ... Right-Negative

2 words to describe sound waves

acoustic propagation properties

bio effects

3 acoustic variables

mechanical, longitudinal

effects of medium upon sound wave

effects of sound wave upon biological tissue through which it…

pressure, density, distance

2 words to describe sound waves

mechanical, longitudinal

acoustic propagation properties

effects of medium upon sound wave

Attenuation Coefficient

Impedance equals... Units

13 µs rule

The time it takes to complete a cycle.…

Attenuation per cm to in soft tissue the attenuation coeffici…

Density X speed... Rayls

For every 13 µs reflector is 1 cm deep in the body

Period. Units of time seconds milliseconds hour. Determined b…

Attenuation Coefficient

Attenuation per cm to in soft tissue the attenuation coeffici…

Impedance equals... Units

Density X speed... Rayls

Improve US axial resolution

Factors for US elevation resolution

Higher frequency

Low Dampening block

SHORTER SPATIAL PULSE LENGTH... higher frequency transducer... incr…

Transducer element height

More scatter... More attenuation

High Q... Narrow BW... To preserve velocity information in Doppler

Improve US axial resolution

SHORTER SPATIAL PULSE LENGTH... higher frequency transducer... incr…

Factors for US elevation resolution

Transducer element height

Mirror image artifact

curved sequenced array

have a thinner PZT

the resulting wave is smaller than the…

sound beams bouncing off a strong reflector and producing an…

what would be the best utilized transducer for imaging the st…

to produce a transducer with a higher frequency on should?

describe destructive interference

Mirror image artifact

sound beams bouncing off a strong reflector and producing an…

curved sequenced array

what would be the best utilized transducer for imaging the st…

d. increased tissue stiffness

c. compression

a. decreases the maximum depth imaged

c. motion of particles is parallel to…

Which one of the following will increase the speed of ultraso…

Ultrasound wave propagation causes displacement of particles…

Decreasing the pulse repetition period... a. decreases the maxi…

What direction is the motion of particles in a longitudinal w…

d. increased tissue stiffness

Which one of the following will increase the speed of ultraso…

c. compression

Ultrasound wave propagation causes displacement of particles…

unrelated

directly related

inversely related

reciprocal

two items that are not associated

two items that are associated such that when one item increas…

two items that are associated such that when one item increas…

inversely proportional

unrelated

two items that are not associated

directly related

two items that are associated such that when one item increas…