.png){kind=logo}
ARDMS SPI Exam Review ( 2026/2027 Update) Questions and Answers
ARDMS SPI Exam Review ( 2026/
2026 Update) Questions and
Answers
Q: What happens to axial resolution when spatial pulse length is decreased?
Answer:
improves
Q: How much will a 3.5 MHz pulse be attenuated after passing through 2 cm of soft tissue?
Answer:
3.5 dB
Q: Propagation speed errors result in
Answer:
improper axial position
Q: Enhancement is caused by
Answer:
weakly attenuating structures
Q: The Doppler shift frequency is
Answer:
directly proportional to the velocity of the reflector
Q: The number of frames per second necessary for a real-time image to be flicker free is
Answer:
more than 15
Q: True/False: The SPTA intensity will always be larger than the SATA intensity.
Answer:
True
Q: The intensity of the ultrasound beam is usually greater at the focal zone because of
Answer:
the smaller beam diameter
Q: If the amplitude is doubled, the intensity is
Answer:
quadrupled
Q: The attenuation for soft tissue is
Answer:
increased with tissue thickness
Q: The acoustic impedance of the matching layer
Answer:
can be chosen to improve transmission into the body
Q: True/False: In a pulse-echo system, the quality factor should be made as large as possible.
Answer:
False
Q: True/False: The beam diameter is constant in the near zone.
Answer:
False
Q: The operating frequency is dependent on
Answer:
thickness of the crystal
Q: The period of an ultrasound wave is
Answer:
the time of one wavelength
Q: The dynamic range of a system is
Answer:
the ratio of smallest to largest power level that the system can handle
Q: True/False: The intensity of an ultrasonic beam can be measured with radiation force
balance.
Answer:
True
Q: Increasing the pulse repetition period
Answer:
increases the maximum depth that can be imaged
Q: Ultrasound bioeffects
Answer:
are not confirmed below 100 mW/cm² SPTA
Q: True/False: No refraction can occur at an interface if the media impedances are equal.
Answer:
False
Q: True/False: Smaller transducers always produce smaller beam diameters.
Answer:
False
Q: True/False: The ultrasound beam profile can be measured with a hydrophone.
.png)