Edelman SPI Comprehensive Exam /Edelman SPI Exam Preparation/Edelman SPI Practice Exam
With Questions And Correct Answers| Brand New Version!
sound waves are: - (ANSWER)longitudinal and mechanical
The speed of US in soft tissue is closest to: - (ANSWER)1,500 m/s
the frequency closest to the lower limit of ultrasound is: - (ANSWER)15,000Hz
which is not an acoustic variable? - (ANSWER)intensity
the effects of soft tissue on US are called: - (ANSWER)acoustic propagation properties
all the following are true EXCEPT - (ANSWER)two waves with identical frequencies must interfere
constructively
put in decreasing order: deca, deci, micro, centi - (ANSWER)deca, deci, centi, & micro
______ is the time to complete one cycle. - (ANSWER)period
which of the following sound waves is ultrasonic and least useful in diagnostic imaging? - (ANSWER)30
KHz
what is the frequency of a wave with 1 msec period? - (ANSWER)1 kHz
______ is the distance covered by one cycle. - (ANSWER)wavelength
which of the following is determined by the source and the medium? - (ANSWER)range resolution
propagation speed = ______ x wavelength - (ANSWER)frequency
as a result of ______ the propagation speed increases. - (ANSWER)decreasing compressibility and
decreasing density
,Edelman SPI Comprehensive Exam /Edelman SPI Exam Preparation/Edelman SPI Practice Exam
With Questions And Correct Answers| Brand New Version!
put in decreasing order of propagation speed: gas, liquid, solid - (ANSWER)solid, liquid, gas
in the same medium, if the frequency of US is increased from 0.77MHz to 1.54 MHz, what happens to
the wavelength? - (ANSWER)halved
a sound wave's frequency is 10 MHz. the wave is traveling in soft tissue. what is its wavelength? -
(ANSWER)0.15 mm
if the frequency of an US wave is doubled, what happens to the period? - (ANSWER)halved
if the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happens to the propagation speed?
- (ANSWER)remains the same
the units of pulse repetition frequency are - (ANSWER)per minute
the time from the beginning of a pulse until its end is _____? - (ANSWER)pulse duration
what happens to the speed of sound in a medium when the bulk modulus of the medium increases? -
(ANSWER)faster
______ resolution is determined by the spatial pulse length. - (ANSWER)radial & axial
if a wave's amplitude is doubled, what happens to the power? - (ANSWER)quadrupled
power of sound has units of - (ANSWER)watts
if the intensity of a sound beam remains unchanged while the beam area is reduced in half, what has
happened to the power? - (ANSWER)halved
, Edelman SPI Comprehensive Exam /Edelman SPI Exam Preparation/Edelman SPI Practice Exam
With Questions And Correct Answers| Brand New Version!
which of these intensities is smallest? SATP, SPTP, SATA - (ANSWER)SATA
the duty factor for continuous wave ultrasound is - (ANSWER)1.0
what is the minimum value of the duty factor? - (ANSWER)0.0%
what are the units of intensity? - (ANSWER)watts/cm squared
what happens to the speed of sound in a medium when the bulk modulus of the medium decreases? -
(ANSWER)slower
the units of attenuation are _____; this is a ______ scale. - (ANSWER)dB, logarithmic
sound intensity is decreased by 75%. how many decibels of attenuation is this? - (ANSWER)6 dB
the fundamental frequency of a transducer is 2.5 MHz. what is the second harmonic frequency? -
(ANSWER)5 MHz
a pulse is emitted by a transducer and is traveling in soft tissue. the go-return time, or time-of-flight, of a
sound pulse is 130 microseconds. what is the reflector depth? - (ANSWER)10 cm
if a 5 MHz sound wave is traveling in the tissues listed below, which will have the shortest wavelength? -
(ANSWER)air
if a 5 MHz sound wave is traveling in the tissues listed below, which will have the longest wavelength? -
(ANSWER)bone
what is the approximate attenuation coefficient of 1 MHz US in soft tissue? - (ANSWER)0.5 dB/cm
the rayl is the unit of: - (ANSWER)impedance
With Questions And Correct Answers| Brand New Version!
sound waves are: - (ANSWER)longitudinal and mechanical
The speed of US in soft tissue is closest to: - (ANSWER)1,500 m/s
the frequency closest to the lower limit of ultrasound is: - (ANSWER)15,000Hz
which is not an acoustic variable? - (ANSWER)intensity
the effects of soft tissue on US are called: - (ANSWER)acoustic propagation properties
all the following are true EXCEPT - (ANSWER)two waves with identical frequencies must interfere
constructively
put in decreasing order: deca, deci, micro, centi - (ANSWER)deca, deci, centi, & micro
______ is the time to complete one cycle. - (ANSWER)period
which of the following sound waves is ultrasonic and least useful in diagnostic imaging? - (ANSWER)30
KHz
what is the frequency of a wave with 1 msec period? - (ANSWER)1 kHz
______ is the distance covered by one cycle. - (ANSWER)wavelength
which of the following is determined by the source and the medium? - (ANSWER)range resolution
propagation speed = ______ x wavelength - (ANSWER)frequency
as a result of ______ the propagation speed increases. - (ANSWER)decreasing compressibility and
decreasing density
,Edelman SPI Comprehensive Exam /Edelman SPI Exam Preparation/Edelman SPI Practice Exam
With Questions And Correct Answers| Brand New Version!
put in decreasing order of propagation speed: gas, liquid, solid - (ANSWER)solid, liquid, gas
in the same medium, if the frequency of US is increased from 0.77MHz to 1.54 MHz, what happens to
the wavelength? - (ANSWER)halved
a sound wave's frequency is 10 MHz. the wave is traveling in soft tissue. what is its wavelength? -
(ANSWER)0.15 mm
if the frequency of an US wave is doubled, what happens to the period? - (ANSWER)halved
if the frequency of US is increased from 0.77 MHz to 1.54 MHz, what happens to the propagation speed?
- (ANSWER)remains the same
the units of pulse repetition frequency are - (ANSWER)per minute
the time from the beginning of a pulse until its end is _____? - (ANSWER)pulse duration
what happens to the speed of sound in a medium when the bulk modulus of the medium increases? -
(ANSWER)faster
______ resolution is determined by the spatial pulse length. - (ANSWER)radial & axial
if a wave's amplitude is doubled, what happens to the power? - (ANSWER)quadrupled
power of sound has units of - (ANSWER)watts
if the intensity of a sound beam remains unchanged while the beam area is reduced in half, what has
happened to the power? - (ANSWER)halved
, Edelman SPI Comprehensive Exam /Edelman SPI Exam Preparation/Edelman SPI Practice Exam
With Questions And Correct Answers| Brand New Version!
which of these intensities is smallest? SATP, SPTP, SATA - (ANSWER)SATA
the duty factor for continuous wave ultrasound is - (ANSWER)1.0
what is the minimum value of the duty factor? - (ANSWER)0.0%
what are the units of intensity? - (ANSWER)watts/cm squared
what happens to the speed of sound in a medium when the bulk modulus of the medium decreases? -
(ANSWER)slower
the units of attenuation are _____; this is a ______ scale. - (ANSWER)dB, logarithmic
sound intensity is decreased by 75%. how many decibels of attenuation is this? - (ANSWER)6 dB
the fundamental frequency of a transducer is 2.5 MHz. what is the second harmonic frequency? -
(ANSWER)5 MHz
a pulse is emitted by a transducer and is traveling in soft tissue. the go-return time, or time-of-flight, of a
sound pulse is 130 microseconds. what is the reflector depth? - (ANSWER)10 cm
if a 5 MHz sound wave is traveling in the tissues listed below, which will have the shortest wavelength? -
(ANSWER)air
if a 5 MHz sound wave is traveling in the tissues listed below, which will have the longest wavelength? -
(ANSWER)bone
what is the approximate attenuation coefficient of 1 MHz US in soft tissue? - (ANSWER)0.5 dB/cm
the rayl is the unit of: - (ANSWER)impedance
