1|Page
Edelman SPI Exam 2025 /Edelman SPI
Exam Preparation/Edelman SPI Practice
Exam With Questions And Correct
Answers| Brand New Version!
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/m, multiplicative
sound intensity is decreased by 75% how many decibels of
attenuation is this - ..........ANSWER.......6dB
the fundamental frequency of a transducer is 2.5MHz 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
,2|Page
*** if a 5MHz sound wave is traveling in the tissues listed below
which will have the shortest wavelength:
fat
air
muscle
bone - ..........ANSWER.......air; the speed of sound in air is the slowest
*** if a 5MHz sound wave is traveling in the tissues listed below
which will have the longest wavelength - ..........ANSWER.......bone; the
speed of sound in bone is highest
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
impedance is the ____ of ___ and __ - ..........ANSWER.......product,
propagation speed, density
what are attenuation's three components -
..........ANSWER.......scattering reflection and absorption
for soft tissue the approximate attenuation coefficient in dB/ cm is
equal to one-half ___ in ____ - ..........ANSWER.......frequency. MHz
,3|Page
as the impedances of two media become vastly different the -
..........ANSWER.......reflection increases
the angle between an US pulse and the boundary between two
media is 90 degrees what is this called - ..........ANSWER.......orthogonal
incidence
the angle between an US pulse and the boundary between two
media is 56 degrees this is called: - ..........ANSWER.......oblique
incidence
refraction occurs only if there are - ..........ANSWER.......oblique
incidence and different propagation speeds
with normal incidence what factors affect refraction of US
propagation speeds
frequencies
attenuation coefficients
none of the above - ..........ANSWER.......none of the above
(T/F) with right angle incidence reflections are always generated at
a boundary if the propagation speeds of the media are different -
..........ANSWER.......false
, 4|Page
___ is a redirection of US in many directions as a result of a rough
boundary between two media - ..........ANSWER.......scattering
which of the following tissues is most likely to create rayleigh
scattering - ..........ANSWER.......red blood cells
(T/F) with normal incidence th angle is 180 degree -
..........ANSWER.......false
under which of the following conditions is axial resolution improved
- ..........ANSWER.......decreased spatial pulse length
snell's law described physics of ____ - ..........ANSWER.......refraction
the most likely amount of reflection at a boundary between soft
tissues is: - ..........ANSWER.......1%
the most typical amount of transmission at a boundary in biologic
media is: - ..........ANSWER.......99%
sound is traveling from medium 1 to medium 2 propagation speeds
of M1 and M2 are 1,600m/s and 1,500m/s respectively there is
Edelman SPI Exam 2025 /Edelman SPI
Exam Preparation/Edelman SPI Practice
Exam With Questions And Correct
Answers| Brand New Version!
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/m, multiplicative
sound intensity is decreased by 75% how many decibels of
attenuation is this - ..........ANSWER.......6dB
the fundamental frequency of a transducer is 2.5MHz 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
,2|Page
*** if a 5MHz sound wave is traveling in the tissues listed below
which will have the shortest wavelength:
fat
air
muscle
bone - ..........ANSWER.......air; the speed of sound in air is the slowest
*** if a 5MHz sound wave is traveling in the tissues listed below
which will have the longest wavelength - ..........ANSWER.......bone; the
speed of sound in bone is highest
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
impedance is the ____ of ___ and __ - ..........ANSWER.......product,
propagation speed, density
what are attenuation's three components -
..........ANSWER.......scattering reflection and absorption
for soft tissue the approximate attenuation coefficient in dB/ cm is
equal to one-half ___ in ____ - ..........ANSWER.......frequency. MHz
,3|Page
as the impedances of two media become vastly different the -
..........ANSWER.......reflection increases
the angle between an US pulse and the boundary between two
media is 90 degrees what is this called - ..........ANSWER.......orthogonal
incidence
the angle between an US pulse and the boundary between two
media is 56 degrees this is called: - ..........ANSWER.......oblique
incidence
refraction occurs only if there are - ..........ANSWER.......oblique
incidence and different propagation speeds
with normal incidence what factors affect refraction of US
propagation speeds
frequencies
attenuation coefficients
none of the above - ..........ANSWER.......none of the above
(T/F) with right angle incidence reflections are always generated at
a boundary if the propagation speeds of the media are different -
..........ANSWER.......false
, 4|Page
___ is a redirection of US in many directions as a result of a rough
boundary between two media - ..........ANSWER.......scattering
which of the following tissues is most likely to create rayleigh
scattering - ..........ANSWER.......red blood cells
(T/F) with normal incidence th angle is 180 degree -
..........ANSWER.......false
under which of the following conditions is axial resolution improved
- ..........ANSWER.......decreased spatial pulse length
snell's law described physics of ____ - ..........ANSWER.......refraction
the most likely amount of reflection at a boundary between soft
tissues is: - ..........ANSWER.......1%
the most typical amount of transmission at a boundary in biologic
media is: - ..........ANSWER.......99%
sound is traveling from medium 1 to medium 2 propagation speeds
of M1 and M2 are 1,600m/s and 1,500m/s respectively there is
