ARDMS SPI Exam Review (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A

ARDMS SPI Exam Review (Latest 2023/

2024 Update) Questions and Verified

Answers| 100% Correct| Grade A

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.