Edelman Book SPI Review

What is the vertical axis of a graph called?

y-axis; it extends up and down

What is the name of the horizontal axis of a graph?

x-axis; extends side to side

How are scores on the ultrasound board exams related to study time?

directly related; since scores increase as study time increases, these variables are directly related

How are caloric intake and weight related?

directly related; as food intake increases, weight increases

How is weight related to a sonographer's time spent exercising?

inversely related; two variables are related when changes in one variable result in changes in the other. When the changes follow in the opposite direction (one increases as the other decreases), the variables are inversely related

What is the reciprocal of 1,000?

0.001; a pair of numbers when multiplied together have the value of 1. In this case, 1,000 x 0.001 = 1

What is the reciprocal of 5?

1/5; a pair of numbers when multiplied together have the value of 1. In this case, 5 x 1/5 = 1

What is the reciprocal of 1/10?

10; a pair of numbers when multiplied together have the value of 1. In this case, 10 x 1/10 = 1

A sack contains 6 pounds of flour. The contents of the bag are increased by a factor of 5. How much flour is in the bag?

30 pounds; the term "increase by factor" means to multiply.

6 x 5 = 30 pounds

A bouquet has 30 flowers. The size of the bouquet is decreased by a factor of 3. How many flowers remain?

10; The term "decrease by a factor" means to divide.

30/3 = 10 flowers

Which of the following is not a measure of area?

A. square cm

B. meters squared

C. cubic meters

D. feet x feet

cubic meters; cubic meters are not used to measure area, they are used to measure volume.

A sonographer measures the perimeter of an anatomical structure. Which of the following choices is a reasonable value for the measurement?

A. 6 cm2

B. 5 cc

C. 15 mm

D. 18 dB

6.2 cm2; perimeter means the length of the outer boundary of a structure. Units of measurement in A, B, and D are not applicable to length.T

What are the units associated with the circumference of a circle?

A. mm

B. mm2

C. mm3

D. m4

mm; circumference is the length of the outer boundary and is measured in units of length.

B and C are units of area and volume. D has units of length to the fourth power, which has no meaning in geometry.

The volume of a cystic structure is estimated from sonographic data. Which of the following is an acceptable measurement of this volume?

A. 6

B. 6 cm

C. 6 cm2

D. 6 cm3

6 cm3; the units of volume are length cubed such as ft3 or cubic centimeters. Volume may also be expressed as length to the third power

A has no units, whereas B and C have units of length and area

The speed of red blood cells traveling through a blood vessel is 750 cm/sec. You are asked to measure this speed in miles per hour. What information would be sufficient for you to complete your task?

A. How many seconds in a minute and how many blood cells in the vessel

B. The number of miles in a meter

C. how many seconds per hour and the number of miles in a centimeter

D. the direction of red blood cell motion and the doppler shift frequency

C. how many seconds per hour and the number of miles in a centimeter

How much bigger is one billion that one thousand?

1,000,000 times

one billion / one thousand = 1,000,000

Select the sequence that appears in increasing order.

A. mega, kilo, hecto, milli, giga

B. nano, milli, micro, deci, deca, mega

C. centi, deci, deca, hecto

D. milli, hecto, centi, deci, nano, giga

C, centi-hecto.

Centi = one hundredth

Deci = one tenth

Deca = 10

Hecto = 100

How many nanoseconds are in 7 seconds?

7,000,000,000; nano means billionth. There are one billion billionths in one second. Therefore, there are seven billion billionths in seven seconds

The letters below represent the abbreviations for the prefixes of the metric system. Select the sequence that appears in decreasing order.

A. m, k, M, g, da

B. g, m, k d u

C. g, k, di, m, u, n

D. M, k, da, d, c

D. M, k, da, d, c

M stands for mega and means millions

k stands for kilo and measn thousands

da stands for deca and means tens

d stands for deci and means one-tenth

c stands for centi and means one-hundredth

Match the following prefixes with their meanings

A. mega 1. hundreds

B. hecto 2. thousands

C. milli 3. thousandths

D. kilo 4. millions

E. nano 5. billions

F. giga 6. billionths

mega; millions

hecto; hundreds

milli; thousandths

kilo; thousands

nano; billionths

giga; billions

Which term is the reciprocal of mega?

micro; Mega means million. The reciprocal of million is millionth. Micro means millionth

How can the volume of an irregularly shaped object be measured most accurately?

by immersing it in water; the volume of any object can be accurately measured by immersing it in water and measuring the volume of water that is displaced

What happens to an acoustic beam's intensity when the power in the beam increases by 25% while the cross-sectional area of the beam remains the same?

A. it increases by 25%

B. increases by 75%

C. it increases by 50%

D. decreases by 25%

It increases by 25%; The intensity is equal tot he power divided by the beam area.

When the power in an acoustic beam is doubled and the cross-sectional area of the beam is halved, then the intensity of the beam is?

A. doubled

B. halved

C. quartered

D. four times larger

Four times larger; Intensity is equal to power divided by beam area. In this case, the power is doubled and the area is halved.

What happens to the intensity of an ultrasound beam when the beam's cross-sectional area remains unchanged while the amplitude of the wave triples?

A. it triples

B. increases ninefold

C. remains the same

D. none of the above

It increases ninefold; A change in the intensity of a wave is proportional to the change in the amplitude of the wave squared.

If the power of the beam is tripled while the cross-sectional area of the beam remains the same, the intensity __________________?

A. it triples

B. increases ninefold

C. remains the same

D. none of the above

Triples; When the cross-sectional area of the beam remains unchanged, the change in the intensity of a beam is proportional to the change in the power.

The amplitude of an acoustic wave is increased. Which of the following will most likely remain unchanged? (More than one answer may be correct).

A. power

B. frequency

C. period

D. intensity

Frequency and period; Frequency and period are not related to amplitude, and remain unaltered when the amplitude is changes.

A sonographer adjusts the output power of the wave emitted by the transducer. Which of the following also changes? (More than one answer may be correct).

A. pulse repetition period

B. PRF

C. propagation speed

D. intensity

Intensity; The PRF and PRP will only change when the max imaging depth changes.

The wavelength of a cycle in an ultrasound wave can be reported with which units?

A. units of time (sec, min, etc.)

B. units of distance (feet, etc.)

C. units of area (m2, etc.)

D. mm only

Units of distance (feet, etc.); Wavelength is the distance from the beginning to the end of one cycle.

The wavelength of an ultrasonic wave is determined by?

A. the sound source

B. the medium through which the wave travels

C. both A and B

D. neither A or B

C, Both A and B;

What is the wavelength of 2 MHz sound in soft tissue?

A. 0.77 mm

B. cannot be determined

C. 1.54 mm

D. 2 mm

A, 0.77 mm; The wavelength if sound in soft tissue is defined by this relationship: wavelength (mm) = 1.54 / frequency (MHz)

Which of the following terms best describes the relationship between frequency and wavelength for sound traveling in soft tissue?

A. reciprocal

B. direct

C. related

D. inverse

D, inverse; The relationship between frequency and wavelength is inverse.

Two sound pulses travel through the same medium. One waves frequency is 2 MHz and the other is 10 MHz. Answer the following 5 questions.

Which sound wave has a longer period?

A. the 10 MHz pulse

B. the 2 MHz pulse

C. neither pulse

D. cannot be determined

B, the 2 MHz pulse; Frequency and period are reciprocals so the 2 MHz wave has a period five times longer than the 10 MHz wave.

Two sound pulses travel through the same medium. One waves frequency is 2 MHz and the other is 10 MHz. Answer the following 5 questions.

Which pulse has a longer wavelength?

A. the 10 MHz pulse

B. the 2 MHz pulse

C. neither pulse

D. cannot be determined

B, the 2 MHz pulse; In any specific medium, the wave with the lower frequency has the longer wavelength

Two sound pulses travel through the same medium. One waves frequency is 2 MHz and the other is 10 MHz. Answer the following 5 questions.

Which pulse has a lower propagation speed?

A. the 10 MHz pulse

B. the 2 MHz pulse

C. neither pulse

D. cannot be determined

C, neither pulse; the propagation speeds of all sound waves are identical while traveling in a specific medium.

Two sound pulses travel through the same medium. One waves frequency is 2 MHz and the other is 10 MHz. Answer the following 5 questions.

Which pulse has the lowest power?

A. the 10 MHz pulse

B. the 2 MHz pulse

C. neither pulse

D. cannot be determined

D, cannot be determined; the power of a wave is not related to its frequency. The power relates to the strength of the wave.

Two sound pulses travel through the same medium. One waves frequency is 2 MHz and the other is 10 MHz. Answer the following 5 questions.

Which pulse has a longer spatial pulse length?

A. the 10 MHz pulse

B. the 2 MHz pulse

C. neither pulse

D. cannot be determined

D, cannot be determined; The spatial pulse length is equal to the wavelength multiplied by the number of cycles in the pulse

True or False

Lower frequency sound creates higher quality images with greater detail?

False; Frequency plays a very important role in image quality. Higher frequency sound usually produces higher quality images with greater detail.

What is the wavelength of 10 MHz sound in soft tissue?

A. 0.77 mm

B. 0.15 mm

C. 1.54 mm

D. 10 mm

B, 0.15 mm; The wavelength of sound in soft tissue is defined by the following relationship: wavelength (mm) = 1.54 / frequency (MHz)

Two waves, a 5 MHz ultrasonic wave and a 5 kHz audible wave, travel through soft tissue. Are the following 4 statements true or false?

The period of the 5 MHz wave is less than the period of the audible wave?

True; The period and frequency of any wave are inversely proportional.

Two waves, a 5 MHz ultrasonic wave and a 5 kHz audible wave, travel through soft tissue. Are the following 4 statements true or false?

The wavelength of the 5 MHz wave is greater than the wavelength of the 5kHz wave?

False; When two sound waves travel through the same medium, the higher frequency wave has a shorter wavelength.

Two waves, a 5 MHz ultrasonic wave and a 5 kHz audible wave, travel through soft tissue. Are the following 4 statements true or false?

The ultrasound wave travels much faster than the audible wave?

False; All sound waves, regardless of their frequencies, travel at exactly the same speed in a particular medium.

Two waves, a 5 MHz ultrasonic wave and a 5 kHz audible wave, travel through soft tissue. Are the following 4 statements true or false?

Both the 5 MHz and the 5 kHz waves travel at similar speeds through the medium?

True; All sound waves travel at exactly the same speed while moving through a particular medium.

An ultrasound pulse propagates from soft tissue through a mass. Sound's propagation speed in the mass is 1,575 m/s. Are these 4 statements true or false?

The frequency of the wave increases as it travels through the mass.

False; A wave's frequency is determined by the sound source only, and is unaffected by the tissues through which it travels

An ultrasound pulse propagates from soft tissue through a mass. Sound's propagation speed in the mass is 1,575 m/s. Are these 4 statements true or false?

The period of the sound wave decreases as it travels through the mass.

False; The period of a wave is determined by the sound source only and is unaffected by the tissue through which it travels.

An ultrasound pulse propagates from soft tissue through a mass. Sound's propagation speed in the mass is 1,575 m/s. Are these 4 statements true or false?

The wavelength increases while the wave travels through the mass.

True; Wavelength is dependent on both the sound source and the medium.

An ultrasound pulse propagates from soft tissue through a mass. Sound's propagation speed in the mass is 1,575 m/s. Are these 4 statements true or false?

The power in the wave increases as it travels though the mass.

False; Typically, the power of a beam diminishes as it travels. This is a result of attenuation.

Three sound waves with identical frequencies of 3 MHz have powers of 2 mW, 5 mW and 15 mW. They all travel through three media --- wood, brick and fast -- with identical thicknesses of 5 cm. Are the following 3 statements true or false?

The waves travel through all three media at the same speed since they have identical frequencies.

False; The determinant of the propagation speed in a medium is the medium only.

Three sound waves with identical frequencies of 3 MHz have powers of 2 mW, 5 mW and 15 mW. They all travel through three media --- wood, brick and fast -- with identical thicknesses of 5 cm. Are the following 3 statements true or false?

The sound waves travel through all three media at different speeds because the waves have different powers.

False; The fact that the waves have dissimilar powers is not the reason they travel at different speeds. The waves travel at different speeds because of the dissimilarities in the densities and stiffness's of the media through which they travel.

Three sound waves with identical frequencies of 3 MHz have powers of 2 mW, 5 mW and 15 mW. They all travel through three media --- wood, brick and fast -- with identical thicknesses of 5 cm. Are the following 3 statements true or false?

The waves travel through all three media at different speeds because the media are different.

True; The characteristics of the media alone determine the speed that sound can travel through it.

Propagation speed can be correctly recorded with which of the following units? (More than one may be correct)

A. miles per hour

B. mm/msec

C. km/sec

D. inches per year

A, B, C, and D, miles per hour, mm/msec, km/sec, inches per year; Speed is recorded as a distance per unit of time such as MPH, or feet/sec.

The propagation speed of continuous wave ultrasound is 1.8 kilometers per second. The wave is then pulsed with a duty factor of 50%. What is the new propagation speed?

A. 0.5 km/sec

B. 0.9 km/sec

C. 1.8 km/sec

D. 3.6 km/sec

E. cannot be determined

C, 1.8 km/sec; The speed of sound in a medium is determined only by the medium.

What is the best estimate of the distance that sound can travel in soft tissue in one second?

A. one yard

B. one hundred yards

C. one mile

D. ten miles

C, one mile; sound travels at a speed of 1,540 meters per second in soft tissue. This is approx. one mile per second.

True or false

Shorter wavelength sound creates higher quality images with greater detail.

True; Wavelength plays a very important role in image quality. Shorter wavelength produces higher quality images with greater detail.

True or false

The wavelength of an acoustic wave is shorter when it is pulsed rather than continuous?

False; Wavelength reports the length of one cycle in a wave. It does not change based on whether the cycle is pat of a pulse or continuous wave.

The speed of sound traveling through bone is _______ soft tissue?

A. higher than

B. lower than

C. equal to

D. cannot be determined

A, higher than; The propagation speed of sound in bone is higher than in soft tissue. Sound travels at a speed of 3-5 km/sec in bone.

Compared to soft tissue, the speed of an acoustic wave through lung tissue is _______?

A. faster

B. slower

C. equal

D. cannot be determined

B, slower; Sound travels at speeds in the range of 0.5 - 1.0 km/sec in lung tissue

What is the best estimate for the speed of sound in tendons?

A. 1,000 m/s

B. 1,540 m/s

C. 1,754 m/s

D. 5,400 m/s

C, 1,754 m/s; Sound travels slightly faster in tendon than in soft tissue.

As a general rule, which of the following lists media in increasing order of propagation speeds?

A. gas, solid, liquid

B. liquid, solid, gas

C. solid, liquid, gas

D. gas, liquid, solid

D, gas, liquid, solid; Generally, sound travels slowest in gases, faster in liquids, and fastest in solids.

What is the speed of sound in air?

A. 1,540 m/s

B. 330 m/s

C. 100 m/s

D. 3,010 m/s

B, 330 m/s; It is substantially lower than the speed of sound in soft tissue.

True or false

Soft tissue is an imaginary construct that actually does not exist?

True; Soft tissue is an imaginary structure with characteristics that represent an "average" of body tissues, including muscle, blood, kidney, and speen.

What is the propagation speed of a 5 megahertz sound wave in soft tissue?

A.. 1,450 m/s

B. 1,540 m/s

C. 1.54 m/s

D. 1.54 mm/us

D, 1.54 mm/us; The speed of any sound wave moving through soft tissue, regardless of frequency is 1.54 mm/us or 1,540 m/s

If sound travels at exactly 1,540 m/sec in a particular medium then the medium _______________.

A. must be soft tissue

B. may be soft tissue

C. cannot be soft tissue

B, may be soft tissue; Other media have the same propagation speed as that of soft tissue

If sound doesn't travel at exactly 1,540 m/sec in a particular medium then the medium _______________.

A. must be soft tissue

B. may be soft tissue

C. cannot be soft tissue

C, cannot be soft tissue; Since the propagation speed of sound in this medium is not 1,540 m/s, the medium cannot be soft tissue

The propagation speeds of ultrasound waves in muscle, liver, kidney, and blood are ____________?

A. exactly the same

B. very similar to each other

C. vastly different

B, very similar to each other; The speed of sound in these media are less than 5% different from each other.

The speed at which a wave travels through a medium is determined by:

A. the sound wave's properties only

B. the medium's properties only

C. properties of both wave and medium

D. none of the above

B, the medium's properties only; Speed is determined by the characteristics of the medium only.

What two properties establish sound's propagation speed in a give medium?

A. elasticity and stiffness

B. stiffness and impedance

C. conductance and density

D. density and stiffness

D, density and stiffness; The two properties of the medium that affect sound's propagation speed are density and stiffness.

The characteristics of four media are described below. Which of the media has the slowest propagation speed?

A. high density and high elasticity

B. low density and high stiffness

C. low stiffness and low density

D. low compressibility and low stiffness

A, high density and high elasticity; The medium described in choice A has the lowest propagation speed.

Compressibility describes a characteristic of a medium. Which two terms describe the same property as compressibility?

A. density and stiffness

B. density and conductance

C. stiffness and elasticity

D. elastance and impedance

C, stiffness and elasticity

When the elasticity of a medium is high the ______ is high

A. stiffness

B. propagation speed

C. compressibility

D. reflectivity

C, compressibility; High elasticity means the same as high compressibility.

Two sound waves with frequencies of 5 and 3 MHz travel to a depth of 8 cm in a medium and then reflect back to the surface of the body. What acoustic wave arrives first at the surface of the body?

A. the 5 MHz wave

B. the 3 MHz wave

C. neither

D. cannot be determined

C, neither; They both travel at the same speed and reach the surface of they body at exactly the same time.

What are the units of pulse duration?

A. units of frequency (Hz, etc.)

B. msec only

C. units of time (sec, years, etc.)

D. units of distance (feet, etc.)

C, units of time; The pulse duration is the actual time that a transducer is creating one pulse.

What determines the pulse duration?

A. the source of the wave

B. the medium in which the pulse travels

C. both A and B

D. neither A nor B

A, the source of the wave; The pulse duration is the actual time that a transducer is creating one sound pulse and is determined by the ultrasound system.

True or false

The pulse duration of an ultrasound and transducer system does not change significantly as long as the system components remain unchagned

True; The pulse duration is the timespan that a pulse exists.

The pulse duration is expressed in the same units as the _____________?

A. period

B. PRF

C. wavelength

D. density

A, period; The pulse duration and the period are measured in units of time, such as seconds, minutes, or hours.

Are the following 4 statements regarding pulse duration true or false?

A sonographer can adjust the duration of an acoustic pulse since it depends upon the pulse propagation speed?

False; A sonographer cannot change the pulse duration.

Are the following 4 statements regarding pulse duration true or false?

A sonographer can adjust the duration of an acoustic pulse since it depends upon the maximum imaging depth.

False; A sonographer cannot change the pulse duration.

Are the following 4 statements regarding pulse duration true or false?

The sonographer cannot change the duration of a sound pulse unless the transducer are switched.

True; The pulse duration depends upon the interaction of the pulser electronics of the machine and the transducer.

Are the following 4 statements regarding pulse duration true or false?

The pulse duration cannot be changed under any circumstances or by an action of the sonographer.

False; A sonographer can alter the pulse duration by using a different imaging transducer or ultrasound system.

What is the pulse duration equal to?

A. frequency multiplied by period

B. period multiplied by wavelength

C. the number of cycles in the pulse divided by the wavelenghth

D. period multiplied by the number of cycles in the pulse

D, period multiplied by the number of cycles in the pulse; The pulse duration is the total time that the transducer is producing a pulse.

What happens to the pulse duration when a sonographer decreases the maximum imaging depth in an ultrasound scan?

A. increases

B. decreases

C. remains the same

D. cannot be determined

C, remains the same; The time that a transducer is "pulsing" does not change with alterations in depth of view.

The spatial pulse length describes certain characteristics of an ultrasound pulse. What are its units?

A. time

B. hertz

C. meters

D. none; its unitless

C, meters; Spatial pulse length is the distance that a pulse occupies in space.

In diagnostic imaging, what determines the spatial pulse length?

A. the ultrasound system

B. the medium through which the pulse travels

C. both A and B

D. neither A nor B

C, both A and B; The spatial pulse length is the distance or length, of a pulse,

Which of the following best describes the spatial pulse length?

A. frequency multiplied by waveform

B. PRF multiplied by wavelength

C. wavelength multiplied by the number of cycles in the pulse

D. duty factor multiplied by the wavelength

C, wavelength multiplied by the number of cycles in the pulse; The total length of a pulse equals the length of each cycle in the pulse multiplied by the number of cycles in the pulse.

Two transducers send ultrasound pulses into soft tissue. One transducer emits sound with a 4 MHz frequency, and the other produces sound at a 6 MHz frequency. Each pulse contains 4 cycles. Which has a greater spatial pulse length.

A. the 6 MHz pulse

B. the 4 MHz pulse

C. they are the same

D. cannot be determined

B, the 4 MHz pulse; Since both pulses have the same number of cycles, the pulse whose individual cycles have a longer wavelength will have the greater overall length.

Using a specific transducer, what happens to the spatial pulse length as the sonographer increases the maximum imaging depth?

A. increases

B. decreases

C. remains the same

D. cannot be determined

C, remains the same; The spatial pulse length is determined by the number of cycles in the pulse and the wavelength of each cycle.

True or false

While imaging soft tissue, the spatial pulse length does not change as long as the components of the ultrasound system are the same

True; The overall length of a pulse is equal to the wavelength multiplied by the number of cycles in the pulse.

On what does the pulse repetition period depend?

A. the source of the sound wave

B. the medium trough which the pulse travels

C. both A and B

D. Neither A nor B

A, the source of the sound wave; Similar to the PRF, the pulse repetition period depends only on the ultrasound system.

A sonographer adjusts the maximum imaging depth of an ultrasound system. Which of the following also changes? (More than one answer may be correct)

A. pulse repetition period

B. wavelength

C. pulse repetition frequency

D. frequency

A and C, PRP and PRF; As imaging depth is altered, the PRF and PRP change.

Which of the following correctly describes pulse repetition period?

A. the product of wavelength and propagation speed

B. the reciprocal of the frequency

C. the sum of the pulse's "on" time

D. the time that the transducer is pulsing

C, the sum of the pulses "on" time; The pulse repetition period is the actual time from the start of one pulse to the start of the next pulse.

What happens to the pulse repetition period if the sonographer decreases the maximum imaging depth achieved in an ultrasound scan?

A. increases

B. decreases

C. remains the same

D. cannot be determined

B, decreases; As the maximum imaging depth, or depth of view, is decreased, the interval of time during which the ultrasound machine listens for returning echoes is diminished.

What term is used to describe the effects of an ultrasound wave on living tissues?

biological effects; there have been no confirmed bioeffects on humans with acoustic intensities typical of those used in diagnostic imaging

Two ultrasound systems, one producing sound with a frequency of 3 MHz and the other at 6 MHz, are used to image a patient. The maximum imaging depth of both exams is 8 cm. Are the following 4 statements true or false?

The period of the 3 MHz sound is greater than the period of the 6 MHz sound.

True; The period of a wave is the time that is required to complete one single cycle.

Two ultrasound systems, one producing sound with a frequency of 3 MHz and the other at 6 MHz, are used to image a patient. The maximum imaging depth of both exams is 8 cm. Are the following 4 statements true or false?

The wavelength of the 3 MHz ultrasound is greater than the 6 MHz sound.

True; Cycles from a 3 MHz wave have longer wavelengths than those from a 6 MHz wave.

Two ultrasound systems, one producing sound with a frequency of 3 MHz and the other at 6 MHz, are used to image a patient. The maximum imaging depth of both exams is 8 cm. Are the following 4 statements true or false?

The pulses produced by both systems travel at the same speed in the patient.

True; All sound waves travel in the same medium at identical speeds. Frequency and speed are unrelated.

Two ultrasound systems, one producing sound with a frequency of 3 MHz and the other at 6 MHz, are used to image a patient. The maximum imaging depth of both exams is 8 cm. Are the following 4 statements true or false?

The PRF of the 6 MHz transducer is greater than the PRF of the 3 MHz transducer.

False; The PRF is derived from the maximum imaging depth as established by the sonographer.

The maximum imaging depth during an exam is unchanged. A new transducer with a longer pulse duration is used. Are the next 4 statements true or false?

The pulse repetition period is increased.

False; PRP is determined by the depth of view

The maximum imaging depth during an exam is unchanged. A new transducer with a longer pulse duration is used. Are the next 4 statements true or false?

The pulse repetition frequency is increased

False; PRF and PRP are reciprocals. If one remains the same, so does the other.

The maximum imaging depth during an exam is unchanged. A new transducer with a longer pulse duration is used. Are the next 4 statements true or false?

The duty factor is increased

True; Duty cycle is calculated by dividing the pulse duration by the pulse repetition period (PRP).

The maximum imaging depth during an exam is unchanged. A new transducer with a longer pulse duration is used. Are the next 4 statements true or false?

The frequency is increased

False; After reading the info in the questions, you will note that nothing is stated regarding the frequency of sound emitted by the transducer.