URR mock exam 1 SPI
The doppler shift is 5000 Hz. The pulse repetition frequency is 9000 Hz. Which of the
following is true?
A. peak pressure gradient is 36mmHg
B. range ambiguity will occur
C. aliasing will occur
D. the peak velocity is equal to 2 m/s - ✔️✔️C. aliasing will occur
When evaluating a suspected arterial stenosis, a doppler angel of ____ degrees will
produce the most accurate flow velocity.
A. 0
B. 30
C. 60
D. 90 - ✔️✔️A. 0
Spatial resolution is:
A. the minimum reflector separation required to produce separate echos.
B. highest with linear phased arrays.
C. the weakest reflected signal the transducer can receive
D. another term for slice thickness resolution - ✔️✔️A. the minumum reflector
separation required to produce echos
Which of the following Doppler angles would lead to the most significant error in
estimation of the flow velocity?
A. 25
B. 45
C. 65
D. 80 - ✔️✔️D. 80
which of the following necessary machine setting with performing a contrast evolution of
the heart?
A. harmonic imaging off
B. mechincal index set to 0.3 or lower
C. mechanical index set to 1.0 or greater
D. Low PRF color Doppler setting - ✔️✔️B. mechanical index set to 0.3 or lower
How many pulses are needed per scan line in order to generate a single frame of color
Doppler?
A. 6
B. 1
C. 16
D. 3 - ✔️✔️D. 3
,The rectus abdominis muscles are associated with ____, while the diaphragm is
associated with ______.
A. shadowing, enhancement
B. comet tail, ring down
C. refractive shadowing, lobe artifact
D. refraction artifact, mirror image artifact - ✔️✔️D. refraction artifact, mirror image
artifact
____ is defined as specific area or location where Doppler shift info is being obtained.
A. spectral broadening
B. nyquist limit
C. sample volume
D. spectral window - ✔️✔️C. sample volume
Increasing the angle of electronic steering causes _____ production of lobe artifact.
A. increased
B. decreased
C. no change
D. limited - ✔️✔️A. increased
Put the following media in order from lowest to highest according to their acoustic
impedance:
Bone
Air
Liver
Blood - ✔️✔️Air, blood, liver, bone
Even and odd harmonic frequencies are created by:
A. alternating current to different piezoelectric elements in the transducer array
B. non-linear sound wave propagation
C. variable timing of the firing of the piezoelectric elements
D. turbulent flow in the blood vessel - ✔️✔️B. non-linear sound wave propagation
what type of transducer array has the fewest numbers of elements?
A. linear phased array
B. annular array
C. curvilinear sequential array
D. mechanical transducer - ✔️✔️B. annular array
______ artifact is caused by refraction and results in subtle image degradation.
A. comet tail
B. scatter
C. misregistration
D. multipath - ✔️✔️D. multipath
, Which of the following will improve lateral resolution at all depths on the image?
A. dynamic transmit focusing
B. dynamic receive focusing
C. decrease probe frequency
D. use >3 focal zones - ✔️✔️B. dynamic receive focusing
which of the following units is used to describe beam intensity?
A. dB/cm/MHz
B. dB
C. mW/cm 2
D. mW - ✔️✔️C. mW/cm 2
which of the following parameters cannot be evaluated by the AIUM test object?
A. depth calibration
B. distance calibration
C. gray scale
D. azimuthal resolution - ✔️✔️C. gray scale
which of the following system adjustments would increase the size of the spectral
window?
A. decreasing rejection
B. changing from a 2mm to 4mm sample size
C. changing from a 4mm to 2mm sample size
D. tortuous vessel - ✔️✔️C. changing from a 4mm to 2mm sample size
In read magnification, image size and _____ increases. In write magnification, image
size and ____ increases.
A. pixel size, number of pixels
B. number of pixels, pixel size
C. reflection amplitude, transmitted amplitude
D. frame rate, time of frame production - ✔️✔️A. pixel size, number of pixels
If the lines per frame increases and the depth remains the same, what other system
parameter must change for sound wave production?
A. propagation speed of the sound produced
B. signal to noise ratio
C. frequency
D. PRF - ✔️✔️D. PRF
How can you adjust elevation focus to a more superficial location in a 1D array
transducer?
A. scan the breast from a later approach
B. use a stand off pad
C. change the short axis focus setting on the console
The doppler shift is 5000 Hz. The pulse repetition frequency is 9000 Hz. Which of the
following is true?
A. peak pressure gradient is 36mmHg
B. range ambiguity will occur
C. aliasing will occur
D. the peak velocity is equal to 2 m/s - ✔️✔️C. aliasing will occur
When evaluating a suspected arterial stenosis, a doppler angel of ____ degrees will
produce the most accurate flow velocity.
A. 0
B. 30
C. 60
D. 90 - ✔️✔️A. 0
Spatial resolution is:
A. the minimum reflector separation required to produce separate echos.
B. highest with linear phased arrays.
C. the weakest reflected signal the transducer can receive
D. another term for slice thickness resolution - ✔️✔️A. the minumum reflector
separation required to produce echos
Which of the following Doppler angles would lead to the most significant error in
estimation of the flow velocity?
A. 25
B. 45
C. 65
D. 80 - ✔️✔️D. 80
which of the following necessary machine setting with performing a contrast evolution of
the heart?
A. harmonic imaging off
B. mechincal index set to 0.3 or lower
C. mechanical index set to 1.0 or greater
D. Low PRF color Doppler setting - ✔️✔️B. mechanical index set to 0.3 or lower
How many pulses are needed per scan line in order to generate a single frame of color
Doppler?
A. 6
B. 1
C. 16
D. 3 - ✔️✔️D. 3
,The rectus abdominis muscles are associated with ____, while the diaphragm is
associated with ______.
A. shadowing, enhancement
B. comet tail, ring down
C. refractive shadowing, lobe artifact
D. refraction artifact, mirror image artifact - ✔️✔️D. refraction artifact, mirror image
artifact
____ is defined as specific area or location where Doppler shift info is being obtained.
A. spectral broadening
B. nyquist limit
C. sample volume
D. spectral window - ✔️✔️C. sample volume
Increasing the angle of electronic steering causes _____ production of lobe artifact.
A. increased
B. decreased
C. no change
D. limited - ✔️✔️A. increased
Put the following media in order from lowest to highest according to their acoustic
impedance:
Bone
Air
Liver
Blood - ✔️✔️Air, blood, liver, bone
Even and odd harmonic frequencies are created by:
A. alternating current to different piezoelectric elements in the transducer array
B. non-linear sound wave propagation
C. variable timing of the firing of the piezoelectric elements
D. turbulent flow in the blood vessel - ✔️✔️B. non-linear sound wave propagation
what type of transducer array has the fewest numbers of elements?
A. linear phased array
B. annular array
C. curvilinear sequential array
D. mechanical transducer - ✔️✔️B. annular array
______ artifact is caused by refraction and results in subtle image degradation.
A. comet tail
B. scatter
C. misregistration
D. multipath - ✔️✔️D. multipath
, Which of the following will improve lateral resolution at all depths on the image?
A. dynamic transmit focusing
B. dynamic receive focusing
C. decrease probe frequency
D. use >3 focal zones - ✔️✔️B. dynamic receive focusing
which of the following units is used to describe beam intensity?
A. dB/cm/MHz
B. dB
C. mW/cm 2
D. mW - ✔️✔️C. mW/cm 2
which of the following parameters cannot be evaluated by the AIUM test object?
A. depth calibration
B. distance calibration
C. gray scale
D. azimuthal resolution - ✔️✔️C. gray scale
which of the following system adjustments would increase the size of the spectral
window?
A. decreasing rejection
B. changing from a 2mm to 4mm sample size
C. changing from a 4mm to 2mm sample size
D. tortuous vessel - ✔️✔️C. changing from a 4mm to 2mm sample size
In read magnification, image size and _____ increases. In write magnification, image
size and ____ increases.
A. pixel size, number of pixels
B. number of pixels, pixel size
C. reflection amplitude, transmitted amplitude
D. frame rate, time of frame production - ✔️✔️A. pixel size, number of pixels
If the lines per frame increases and the depth remains the same, what other system
parameter must change for sound wave production?
A. propagation speed of the sound produced
B. signal to noise ratio
C. frequency
D. PRF - ✔️✔️D. PRF
How can you adjust elevation focus to a more superficial location in a 1D array
transducer?
A. scan the breast from a later approach
B. use a stand off pad
C. change the short axis focus setting on the console
