- For those who are writing the SPI- Ultrasound physics exam. I have notes for sale it is about 1500 multiple choices sets for ARDMS -spi exam = 50 USA DOLLARS. I study those notes and passed my exam 670/700 . If you want to buy i can copy the notes and send them to you in e mail or by mail you can reach me atdrsteveramsey@gmail.com . I will also include some of the ideas about the 12 simulation questions. The payment with PayPal to drsteveramsey@gmail.com , fetal gender , Saad Ismail
- what is the average velocity of ultrasound in soft tissue at 5.0 MHz ?
- (A) 1540 meters per millisecond
(B) 1540 meters per microsecond
(C) 1540 meters per nanosecond
(D) 1540 meters per second correct answer
Red blood cells are an example of a
(A) rayleigh reflector
(B) non-specular reflector
(C) strong reflector correct answer
(D) mirror reflector
Which has a higher acoustic impedance coefficient ?
(A) solid correct
(B) liquid
(C) gas
(D) all the above
A hyperechoic region is
(A) low amplitude
(B) anechoic
(C) echo free
(D) echogenic correct
The angle of refraction is described by
(A) Snell’s law correct
(B) Curie’s principle
(C) Huygen’s principle
(D) speed differences
What is reflection in multiple directions from a reflector that is small relative to
the wavelength
(A) multipath artifact
(B) Snell’s scattering
(C) Hguyens principle
(D) Rayleigh scattering correct
Receiver demodulation can not be controlled by the sonographer
(A) True correct
(B) False
Reflection at a tissue interface depends primarily on
(A) impedance correct
(B) bandwidth
(C) beam profile
(D) velocity differences
Azimuthal resolution is also known as
(A) lateral resolution correct
(B) range resolution
(C) axial resolution
(D) none of the above
What is the Doppler shift frequency in soft tissue if the transmitted frequency is 3
MHz and the velocity of a reflector is 20 cm/s ?
(A) 195 Hz
(B) 390 Hz
(C) 780 Hz correct
(D) 3.07 MHz
(E) 3.14 MHz11. Intensity of the ultrasound beam is proportional to the square root of the acoustic pressure
(A) True
(B) False correct
Aliasing is not a problem with color flow imaging.
(A) True
(B) False correct
Density is an acoustic variable
(A) True correct
(B) False
If the PRF increases, duty factor ___________
(A) Increases correct
(B) decreases
C) remains the same
(D) is unrelated15. A-Mode is mainly used to measure distance
(A) True correct
(B) False16. Period is
A) the amplitude of a wave
(B) the speed of a wave
(C) the time it takes to complete a single cycle correct
(D) the length it takes to complete a single cycle- Spatial pulse length is determined by the
(A) oscillator
(B) pulser
(C) pulse oscillator
(D) all of the above correct
Transmission angle is less than the incident angle if the propagation speed of
(A) medium 2 is less than that of medium 1 correct
(B) medium 1 is higher than that of medium 2
(C) two media are the same
(D) none of the above
Diffraction is the
(A) spreading out of an ultrasound beam correct
(B) bending of the sound beam
(C) dissipation of heat
(D) reverse refraction
Annular array transducers steer the beam
(A) axially
(B) electronically
(C) mechanically correct
(D) none of the above
_______ is a Rayleigh scatterer
(A) lung
(B) liver
(C) red cell correct
(D) diaphragm
A bit is the smallest part of a digital “word”
(A) True correct
(B) False
Velocity times density equals
(A) intensity
(B) duty factor
(C) quality factor
(D) impedance correct
What is the pulse duration for five cycles of 5 MHz ultrasound ?
(A) 0.5 microsecond
(B) 1.0 microsecond correct
(C) 0.25 microsecond
(D) 5.0 microsecond
Aliasing artifacts are unique to
(A) power doppler
(B) pulsed Doppler correct
(C) continuous wave Doppler
(D) none of the above
The intensity reflection coefficient depends on acoustic impedance mismatch
(A) True correct
(B) False
Velocity of sound in a medium is constant regardless of frequency.
(A) True correct
(B) False
Density is not an acoustic variable
(A) True
(B) False answer is b false
If the PRP increases, duty factor ___________
(A) Increases
(B) decreases correct
(C) remains the same
(D) is unrelated
A high PRF is needed to image deep structures
(A) True
(B) False answer is false b
Longitudinal waves are
(A) parallel to the axis of the wave propagation correct
(B) perpendicular to the axis of the wave propagation
(C) compressed perpendicular to the axis of the wave propagation
(D) none of the above
Wavelength has the greatest effect on
(A) lateral resolution
(B) far zone
(C) axial resolution correct
(D) temporal resolution
What is necessary to calculate distance to a reflector ?
(A) density and pulse length
(B) density and round-trip time
(C) attenuation coefficient and reflector amplitude
(D) propagation speed and round-trip time correct answer
Scattering is
(A) redirection of the sound beam in many directions ;correct
(B) bending of the sound beam in any direction
(C) heat conversion
(D) none of the above
The percentage of ultrasound reflected at an air/liquid interface is
(A) 100%
(B) high correct answer
(C) low
(D) none
A specular reflector has surface texture ________ the wavelength of the incident
wave
(A) less than
(B) equal to
(C) irrelevant to correct
(C) greater than
In a cathode ray tube display device the electron beam is steered by
(A) deflection plates correct answer
(B) phased arrays
(C) photon converters
(D) voltages from the scan converter
If it takes 50 microseconds for a pulse to return as an echo, how deep is the
reflector ?
(A) 1 cm
(B) 2 cm
(C) 3 cm correct answer
(D) 4 cm
Q value is determined by
(A) frequency and bandwidth correct answer
(B) pulse duration and bandwidth
(C) impedance and bandwidth
(D) none of the above
Shadowing artifacts are
(A) from velocity change
(B) observed distal to cystic structures
(C) caused by differences in attenuation correct answer
(D) none of the above
A-mode scanning represents the depth of the signal in the horizontal dimension.
(A) True correct answer
(B) False
Poiseuille’s equation states that the volume rate of flow through a vessel is
inversely proportional to
(A) vessel radius
(B) blood density
(C) pressure gradient
(D) blood viscosity correct answer
Temperature is an acoustic variable
(A) True correct answer
(B) False
41; make sure to study the ALARA PRINCIPLE
42.
Spatial pulse length __________ if the frequency is increased
(A) Increases
(B) decreases correct answer
(C) remains the same
(D) is unrelated
The Reynolds number predicts aliasing
(A) True
(B) False answer is b false
Transverse waves are
(A) parallel to the axis of the wave propagation
(B) perpendicular to the axis of the wave propagation ; correct answer
(C) compressed perpendicular to the axis of the wave propagation
(D) none of the above
Beam diameter determines
(A) temporal resolution
(B) the number of scan lines
(C) axial resolution
(D) lateral resolution correct answer
Mirror image artifact is sometimes seen near the
(A) aorta
(B) gall bladder
(C) stomach
(D) diaphragm correct answer
The binary number 1011000 equals the decimal
number
(A) 64
(B) 101
(C) 88 correct answer
(D) 1342
Low frequency transducers have
(A) shorter wavelengths and less penetration
(B) longer wavelengths and greater penetration; correct answer
(C) shorter wavelengths and greater penetration
(D) longer wavelengths and less penetration- For those who are writing the SPI- Ultrasound physics exam. I have notes for sale it is about 1500 multiple choices sets for ARDMS -spi exam = 50 USA DOLLARS. I study those notes and passed my exam 670/700 . If you want to buy i can copy the notes and send them to you in e mail or by mail you can reach me at drsteveramsey@gmail.com . I will also include some of the ideas about the 12 simulation questions. The payment with PayPal to drsteveramsey@gmail.com , fetal gender , Saad Ismail
Steve Ramsey. Calgary, Canada.