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SPI 2025 EXAM REVIEW Actual Questions and Answers Verified by Expert |
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SPI 2025 EXAM REVIEW Actual Questions and AnswersVerified by Expert | 2024-2025
What is the minimum permissible value for both the IRC and the ITC?
A. Different from each other
B. -1
C. 100%
D. 0 - precise answers>>>D. The minimum value for the ITC and the ITRC is zero.
What is the name of the horizontal axis of a graph?
A. Z-Axis
B. X-Axis
C. Y-Axis
D. Red axis - precise answers>>>The horizontal axis of a graph is the x-axis. The x-axis extends side to
side.
A sound beam with an intensity of 45 W/cm^2 strikes a boundary and 70% of the wave's intensity is
reflected. How much is transmitted?
a. 45 W/cm^2
b. 25 W/cm^2
c. 30%
d. 100% - precise answers>>>C. 30% of the wave's intensity is transmitted.
What is the vertical axis of a graph called?
A. Z-Axis
B. X-Axis
C. Y-Axis
D. Time-Axis - precise answers>>>C. The vertical axis of a graph is called the y-axis and extends up and
down.
,Which of the following best describes the spatial pulse length?
A. Frequency multiplied by wavelength
B. PRF multiplied by wavelength
C. Wavelength multiplied by the number of cycles in the pulse
D. Duty factor multiplied by the wavelength - precise answers>>>C. wavelength multiplied by the
number of cycles in the pulse
Two transducers send ultrasound pulses into soft tissue. One transducer emits sound with a 4 MHz
frequency, and the other produces sound at a 6 MHz frequency. Each pulse contains 4 cycles. Which has
a greater spatial pulse length?
A. the 6 MHz pulse
B. The 4 MHz pulse
C. they are the same
D. cannot be determined - precise answers>>>B. Since both pulses have the same number of cycles, the
pulse whose individual cycles have a longer wavelength will have the greater overall length. In a given
medium, waves with lower frequencies have longer wavelengths. The 4 MHz wave has a longer
wavelength than the 6 MHz wave and therefore will have a longer spatial pulse length.
Using a specific transducer, what happens to the spatial pulse length as the sonographer increases the
maximum imaging depth?
A. increases
B. decreases
C. remains the same
D. cannot be determined - precise answers>>>c. remains the same
True or false? While imaging soft tissue, the spatial pulse length does not change as long as the
components of the ultrasound system are the same. - precise answers>>>True. The overall length of a
pulse is equal to the wavelength multiplied by the number of cycles in the pulse. Using a particular
ultrasound system and transducer, the pulse length cannot change.
,On what does the pulse repetition period depend?
A. The source of the sound wave
B. The medium through which the pulse travels
C. Both A & B
D. Neither - precise answers>>>A. Similar to the PRF, the PRP depends only on the ultrasound system.
The pulse repetition period is the time from the start of one pulse to the start of the next pulse, and
includes the pulse duration and the receiving time. When the sonographer adjust the depth of view, the
pulse repetition is altered.
A sonographer adjusts the maximum imaging depth of an ultrasound system. Which of the following
also changes?
A. PRP
B. Wavelength
C. PRF
D. Frequency - precise answers>>>A & C
As imaging depth is altered, the PRF and PRP change.
Which of the following correctly describes pulse repetition period?
A. The product of wavelength and propagation speed
B. The reciprocal of the frequency
C. The sum of the pulse's "on" time and the listening "off" time
D. The time that the transducer is pulsing - precise answers>>>C. The PRP is the actual time from the
start of one pulse to the start of the next pulse
What happens to the pulse repetition period if the Sonographer decreases the maximum imaging depth
achieved in an ultrasound scan?
A. Increases
B. Decreases
C. Remains the same
D. Cannot be determined - precise answers>>>B. PRP and depth of view are directly related to
, What are the units of pulse repetition frequency?
A. Seconds
B. Per second (hertz)
C. mm/microsecond
D. Seconds^2 - precise answers>>>B. Per second (hertz)
The pulse repetition frequency of ultrasound produced by a transducer typical of diagnostic imaging
systems ___.
A. Can be changed by the Sonographer
B. Depends on the medium through which the sound travels
C. Is unchanged as long as the same ultrasound system is used
D. Has nothing to do with clinical imaging - precise answers>>>A. As the Sonographer increases the
maximum in imaging depth, the PRF must decrease
In diagnostic imaging, what establishes the pulse repetition frequency?
A. The source of the sound
B. The medium through which the sound travels
C. Both A & B
D. Neither - precise answers>>>A. The source of sound
The pulse repetition frequency is the ____.
A. Product of the wavelength and propagation speed
B. Reciprocal of the period
C. Sum of pulse duration and listening time
D. Reciprocal of pulse repetition period - precise answers>>>D. The PRF and the pulse repetition period
are reciprocals.
What is the typical value for the duty factor of pulsed sound waves used in diagnostic imaging?
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