Font size
WorksheetsSPI Review Part 1
Total questions: 87
Worksheet time: 44mins
What is the process of improving the visibility of edges in an image called?
Coded Excitation
Edge Enhancement
Speckle Reduction
Dynamic Range Adjustment
Which principle is used to describe the relationship between flow and velocity in hemodynamics?
Doppler's Principle
Bernoulli's Principle
Pascal's Principle
Archimedes' Principle
What type of Doppler is used to measure high velocity blood flow?
Continuous Wave Doppler
Pulsed Wave Doppler
Color Flow Doppler
Spectral Doppler
Which artifact occurs due to multiple reflections between two strong reflectors?
Reverberations
Shadowing
Enhancement
Aliasing
What is a non-thermal mechanism mentioned in the bioeffects section?
Cavitation
Thermal Mechanism
Electrical Hazards
Performance Measures
What is the importance of including units with numerical values?
Units make numbers more ambiguous.
Units are not necessary for understanding.
Units provide clarity and context.
Units are only needed in scientific contexts.
Which of the following is an example of a unit for measuring length?
cm
cm²
cm³
seconds
What is the unit for measuring area?
cm
cm²
cm³
ft
How can volume be measured according to the text?
By using a ruler
By measuring the displaced water
By counting the number of objects
By using a stopwatch
Which of the following is NOT considered a unit?
Percent
cm
ft
cm²
What is the purpose of scientific notation?
To make numbers larger
To represent very large or very small numbers in a shorthand manner
To convert numbers into fractions
To eliminate decimal points
What is the first step in converting a number to scientific notation?
Add zeros to the number
Divide the number by 10
Shift the decimal point so the resulting number is between one and ten
Multiply by 100
What is the scientific notation for the number 1,000,000?
1.0x10^3
1.0x10^5
1.0x10^6
1.0x10^7
If a number in scientific notation has a positive exponent, what does it indicate about the number?
The number is less than 1
The number is greater than 10
The number is between 1 and 10
The number is negative
How many hertz is 3 MHz?
3,000,000
3,000
333
0.003
How much bigger is a billion than a million?
10 times
100 times
1,000 times
500 times
How many milliliters are contained in a jar filled with 5 liters of fluid?
5
5,000
500
0.005
How many liters are in 80 ml of fluid?
8
80
0.008
0.080
What is the prefix for billions in the metric system?
mega-
giga-
nano-
micro-
Which symbol represents the prefix 'micro-'?
M
G
μ
n
What is the meaning of the prefix 'nano-'?
millions
billions
billionths
millionths
Which prefix is used for hundreds in the metric system?
deca-
centi-
hecto-
deci-
What does the descriptive word 'macro' mean?
smaller
bigger
millions
billionths
What is the primary function of sound in creating images according to the document?
Sound creates images by reflecting light.
Sound creates images by sending short bursts into the body.
Sound creates images by absorbing energy.
Sound creates images by changing color.
What are the effects of the medium upon the sound wave called?
Biologic Effects
Acoustic Propagation Properties
Sound Effects
Wave Dynamics
Which of the following is NOT true about sound as described in the document?
Sound carries energy from place to place.
Sound can travel through a vacuum.
Sound is a mechanical, longitudinal wave.
Sound travels in a straight line.
What is the unit of measurement for pressure in acoustic variables?
kg/cm³
mm or cm
Pascals (Pa)
Newtons (N)
Which acoustic variable measures the concentration of mass within a volume?
Pressure
Distance
Density
Force
In which direction do particles move in a transverse wave?
Parallel to the wave's direction
Perpendicular to the wave's direction
In a circular motion
In a random direction
What are the regions of higher pressure and density in a longitudinal wave called?
Rarefactions
Troughs
Compressions
Peaks
Which of the following is NOT an acoustic parameter used to describe sound waves?
Wavelength
Frequency
Temperature
Intensity
What is the direction of particle vibration in a longitudinal wave?
Perpendicular to the wave's direction
Circular around the wave
Back and forth in the same direction as the wave
Randomly scattered
What is the definition of a period in the context of cycles?
The distance between two points
The time required to complete a single cycle
The speed of an object
The frequency of a wave
Which of the following is an example of a period?
The distance from the Earth to the Moon
The period of the moon circling the Earth is 28 days
The speed of light
The frequency of a sound wave
What units are typically used to measure a period?
Meters
Kilograms
Microseconds (μsec) or any unit of time
Liters
Can the period be changed by a sonographer?
Yes, it can be changed
No, it cannot be changed by the sonographer
Only under certain conditions
It depends on the equipment used
What is the definition of frequency?
The number of cycles of an acoustic variable that occur in one second.
The number of certain events that occur in a particular time duration.
The speed of sound in a medium.
The amplitude of a wave.
What is the frequency of presidential elections according to the example?
Once per year
Once per decade
Once per four years
Once per month
What unit is used to measure frequency?
Decibels
Meters
Hertz
Joules
Can the frequency be changed by a sonographer?
Yes, it can be changed
No, it cannot be changed
Only in certain conditions
It depends on the equipment
What is the typical range of frequency values in diagnostic ultrasound?
1 kHz to 10 kHz
2 MHz to 15 MHz
20 Hz to 20 kHz
100 Hz to 1 kHz
In the illustration, how many cycles occur in 4 seconds?
4 cycles
6 cycles
8 cycles
10 cycles
What is the frequency range of audible sound?
Less than 20 Hz
Between 20 Hz and 20,000 Hz
Greater than 20,000 Hz
Exactly 20,000 Hz
What is the relationship between frequency and period?
They are directly proportional
They are inversely proportional
They are unrelated
They are equal
Which type of sound frequency is too high to be heard by humans?
Audible
Infrasound
Ultrasound
Subsonic
What is the equation for frequency in terms of period?
frequency (Hz) = period (sec)
frequency (Hz) = 1 / period (sec)
frequency (Hz) = period (sec) x 2
frequency (Hz) = period (sec) / 2
What are the three parameters that describe a sound beam's strength?
Frequency, wavelength, and speed
Amplitude, power, and intensity
Pitch, tone, and volume
Duration, echo, and resonance
What is the initial determinant of the bigness parameters?
Sonographer
Sound source
Environment
Receiver
How can the bigness parameters be adjusted?
By changing the environment
By the sonographer
By altering the frequency
By modifying the receiver
What happens to the bigness parameters as sound travels?
They increase
They remain constant
They decrease
They fluctuate randomly
What is the definition of amplitude in the context of acoustic variables?
The sum of all acoustic variables
The difference between the average and maximum value of an acoustic variable
The speed of sound in a medium
The frequency of sound waves
In what units can pressure, as an acoustic variable, be measured?
Decibels
Grams
Pascals
Meters
What is the peak-to-peak amplitude?
The sum of maximum and minimum values of an acoustic variable
The difference between maximum and minimum values of an acoustic variable
The average value of an acoustic variable
The frequency of an acoustic variable
Diagram showing amplitude and peak-to-peak amplitude of an acoustic variable
Diagram showing frequency and wavelength of an acoustic variable
Diagram showing amplitude and peak-to-peak amplitude of an acoustic variable
Diagram showing velocity and acceleration of an acoustic variable
Diagram showing pressure and density of an acoustic variable
What is the definition of power as described in the document?
The rate at which energy is stored
The rate at which work is performed or energy is transferred
The rate at which sound travels
The rate at which amplitude changes
What is the unit of power?
Joules
Newtons
Watts
Volts
Initially, what determines power according to the document?
Amplitude
Frequency
Sound source
Sonographer
How does power change as sound travels?
Power increases
Power remains constant
Power decreases
Power fluctuates
Can power be changed by a sonographer?
No, it cannot be changed
Yes, it can be changed
Only under certain conditions
It depends on the frequency
What is the relationship between power and amplitude?
Power is inversely proportional to amplitude
Power is proportional to the wave's amplitude squared
Power is directly proportional to amplitude
Power is unrelated to amplitude
If the amplitude is tripled, by what factor is the power increased?
Three
Six
Nine
Twelve
If the amplitude is halved, by what factor is the power decreased?
Two
Four
Eight
Sixteen
If the amplitude is doubled, by what factor is the power increased?
Two
Three
Four
Five
What is the definition of intensity in a sound beam?
The speed of sound in a medium
The concentration of energy in a sound beam
The frequency of the sound wave
The wavelength of the sound wave
What is the formula for calculating intensity?
Intensity = frequency / wavelength
Intensity = power / time
Intensity = power / beam area
Intensity = speed / frequency
What are the units of intensity?
watts/second
watts/meter
watts/square cm
watts/liter
How does intensity change when the power is doubled?
Intensity is halved
Intensity remains the same
Intensity is doubled
Intensity is quartered
How is intensity related to amplitude?
Intensity is inversely proportional to amplitude
Intensity is proportional to amplitude squared
Intensity is proportional to amplitude cubed
Intensity is inversely proportional to amplitude squared
What is the definition of wavelength as described in the document?
The length or distance of a single cycle
The height of a wave
The speed of sound in a medium
The frequency of a wave
What units can be used to measure wavelength?
Seconds
Meters or millimeters
Kilograms
Liters
What determines the wavelength according to the document?
Only the source
Only the medium
Both the source and the medium
The temperature
Can the wavelength be changed by the sonographer?
Yes, it can be changed
No, it cannot be changed
Only in certain conditions
It depends on the equipment
What is the typical range of wavelength values in soft tissue?
0.1–0.8 mm
1.0–2.0 mm
0.5–1.5 mm
2.0–3.0 mm
What is the equation for calculating wavelength in the document?
Wavelength (mm) = frequency (MHz) / propagation speed (mm/μs)
Wavelength (mm) = propagation speed (mm/μs) / frequency (MHz)
Wavelength (mm) = frequency (MHz) × propagation speed (mm/μs)
Wavelength (mm) = propagation speed (mm/μs) + frequency (MHz)
In soft tissue, what is the wavelength of sound with a frequency of 1 MHz?
0.77 mm
1.54 mm
2.00 mm
1.00 mm
According to the rule in the document, how do you calculate wavelength in soft tissue?
Multiply 1.54 mm by frequency in MHz
Divide 1.54 mm by frequency in MHz
Add 1.54 mm to frequency in MHz
Subtract frequency in MHz from 1.54 mm
What is the definition of propagation speed?
The rate that sound travels through a medium, also called velocity or speed.
The frequency at which sound waves oscillate.
The distance sound travels in one second.
The amplitude of sound waves in a medium.
What units are used to measure propagation speed?
Hertz (Hz)
Meters per second, mm/μs
Decibels (dB)
Kilograms per cubic meter
What determines the propagation speed of sound?
Frequency and amplitude
Medium only - Density and stiffness
Temperature and humidity
Wavelength and pressure
Can the propagation speed of sound be changed by a sonographer?
Yes, by adjusting the frequency
No, cannot be changed by the sonographer
Yes, by changing the medium
No, it is fixed by the equipment
What is the average speed of sound in soft tissue?
330 m/s
1,540 m/s
1,200 m/s
2,000 m/s
According to the general rule, which medium has the fastest sound speed?
Gas
Liquid
Solid
Air
How does stiffness affect the speed of sound?
Stiffness decreases speed
Stiffness has no effect on speed
Stiffness increases speed
Stiffness only affects frequency
What is the typical unit for measuring the frequency of a continuous wave?
Seconds
Watts
1/sec, Hz
mm
Which parameter of a continuous wave is determined by both the source and the medium?
Frequency
Wavelength
Amplitude
Power
What is the typical range of values for the period of a continuous wave?
2-15 MHz
0.06-0.5 usec
0.1-0.8 mm
500-4000 m/s
Which parameter of a continuous wave is measured in watts?
Intensity
Frequency
Power
Wavelength
