SPI Questions with solved solutions
Measured Doppler frequencies indicate the ________ of blood flow. -
ANSWER>>Velocity
Which of the following best describes a continuous wave transducer?
a. Creates an anatomic image
b. Contains one active element
c. Range resolution is an advantage
d. Measures high velocities with great accuracy - ANSWER>>d. Measures high
velocities with great accuracy
A system has a wavelength of 0.75 mm and there are 0.91 cycles in a pulse. What
is the axial resolution of this system? - ANSWER>>0.34 mm
All of the following are steps carried out by the receiver, except:
pre-amplification
noise rejection
rectification
time gain compensation - ANSWER>>pre-amplification
An operator verifies that the brightness and contrast controls on an ultrasound
system are functioning properly. The operator is conducting which of the
following quality control tests?
display monitor verification
distance accuracy test
image uniformity test
Physical and mechanical inspection - ANSWER>>Physical and mechanical
inspection
,What artifact might you see with an array transducer due to energy that
propagates from the transducer in a direction different from that of the primary
beam? - ANSWER>>Grating lobe
What aspect of the Doppler spectrum is color encoded with color Doppler? -
ANSWER>>frequency shift
You are imaging a round mass with irregular borders. The mass has a much slower
propagation speed than surrounding tissue. What sound-tissue interaction will be
encountered as the ultrasound propagates through the interface?
Refraction
Reflection
Absorption
Scattering
All of the above - ANSWER>>All of the above
Which transducer would provide the longest near-zone length?
10 MHz, 6 mm diameter aperture
10 MHz, 5 mm diameter aperture
10 MHz, 4 mm diameter aperture
10 MHz, 3 mm diameter aperture
10 MHz, 2 mm diameter aperture - ANSWER>>10 MHz, 6 mm diameter aperture
Near-zone length increases with increasing aperture. The aperture is the size of
the source of sound
If you increase the Doppler transmit frequency, which of the following will result?
Velocity will increase
The Doppler frequency shift will increase
The penetration will increase
, The frame rate will increase
The Nyquist limit will increase - ANSWER>>The Doppler frequency shift will
increase
The Doppler waveform you have obtained from a collateral channel shows high
resistance compared to the contralateral normal artery. The increased resistance
may be attributed to:
(a) Decreased tube diameter
(b) Increased vessel length
(c) Decreased resistance in the vascular bed
(d) All of the above
(e) A and B - ANSWER>>(e) A and B
Which of the following anatomical structures exhibits the lowest level of
attenuation?
Rib
Sternocleidomastoid muscle
Bowel
Distended bladder - ANSWER>>Distended bladder
What is the average speed of sound in soft tissue? - ANSWER>>1540 m/s
In the following diagram, what does the letter (A) represent? -
ANSWER>>Wavelength
Which of the following is NOT identifiable in the image:
Presence of flow
Flow velocity
Peak velocity
Direction of flow - ANSWER>>peak velocity
Measured Doppler frequencies indicate the ________ of blood flow. -
ANSWER>>Velocity
Which of the following best describes a continuous wave transducer?
a. Creates an anatomic image
b. Contains one active element
c. Range resolution is an advantage
d. Measures high velocities with great accuracy - ANSWER>>d. Measures high
velocities with great accuracy
A system has a wavelength of 0.75 mm and there are 0.91 cycles in a pulse. What
is the axial resolution of this system? - ANSWER>>0.34 mm
All of the following are steps carried out by the receiver, except:
pre-amplification
noise rejection
rectification
time gain compensation - ANSWER>>pre-amplification
An operator verifies that the brightness and contrast controls on an ultrasound
system are functioning properly. The operator is conducting which of the
following quality control tests?
display monitor verification
distance accuracy test
image uniformity test
Physical and mechanical inspection - ANSWER>>Physical and mechanical
inspection
,What artifact might you see with an array transducer due to energy that
propagates from the transducer in a direction different from that of the primary
beam? - ANSWER>>Grating lobe
What aspect of the Doppler spectrum is color encoded with color Doppler? -
ANSWER>>frequency shift
You are imaging a round mass with irregular borders. The mass has a much slower
propagation speed than surrounding tissue. What sound-tissue interaction will be
encountered as the ultrasound propagates through the interface?
Refraction
Reflection
Absorption
Scattering
All of the above - ANSWER>>All of the above
Which transducer would provide the longest near-zone length?
10 MHz, 6 mm diameter aperture
10 MHz, 5 mm diameter aperture
10 MHz, 4 mm diameter aperture
10 MHz, 3 mm diameter aperture
10 MHz, 2 mm diameter aperture - ANSWER>>10 MHz, 6 mm diameter aperture
Near-zone length increases with increasing aperture. The aperture is the size of
the source of sound
If you increase the Doppler transmit frequency, which of the following will result?
Velocity will increase
The Doppler frequency shift will increase
The penetration will increase
, The frame rate will increase
The Nyquist limit will increase - ANSWER>>The Doppler frequency shift will
increase
The Doppler waveform you have obtained from a collateral channel shows high
resistance compared to the contralateral normal artery. The increased resistance
may be attributed to:
(a) Decreased tube diameter
(b) Increased vessel length
(c) Decreased resistance in the vascular bed
(d) All of the above
(e) A and B - ANSWER>>(e) A and B
Which of the following anatomical structures exhibits the lowest level of
attenuation?
Rib
Sternocleidomastoid muscle
Bowel
Distended bladder - ANSWER>>Distended bladder
What is the average speed of sound in soft tissue? - ANSWER>>1540 m/s
In the following diagram, what does the letter (A) represent? -
ANSWER>>Wavelength
Which of the following is NOT identifiable in the image:
Presence of flow
Flow velocity
Peak velocity
Direction of flow - ANSWER>>peak velocity
