ARDMS SPI Exam latest 2026-2027 update comprehensive
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questions and correct answers already graded A+ passed 100%
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Example of nonspecular reflector - ✔✔red blood cells
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What happens to spatial pulse length when frequency increases? - ✔✔decreases
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Axial resolution is dependent on? - ✔✔wavelength
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Lateral resolution is dependent on? - ✔✔beam diameter
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Where does the beam of an unfocused transducer diverge? - ✔✔Fraunhofer zone
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Reverberation artifacts are a result of - ✔✔two or more strong reflecting surfaces
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True/False: Grating lobes are essential for the proper operation of a linear phased array. -
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✔✔False
True/False: Electronically steered scanners always produce higher resolution images than
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do mechanically steered scanners. - ✔✔False
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True/False: An annular array scanner uses mechanical beam steering. - ✔✔True
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True/False: A linear sequenced array cannot be dynamically focused. - ✔✔False
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,registration or B-mode alignment - ✔✔Which AIUM test object function utilizes all the
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groups of wires in the AIUM 100 mm test object?
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axial resolution - ✔✔Which AIUM test object function utilizes the A group of wires in the
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AIUM 100 mm test object? || || || ||
lateral resolution - ✔✔Which AIUM test object function utilizes the B group of wires in the
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AIUM 100 mm test object? || || || ||
dead zone - ✔✔Which AIUM test object function utilizes the D group of wires in the AIUM
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100 mm test object?
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depth calibration - ✔✔Which AIUM test object function utilizes the C or E groups of wires
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in the AIUM 100 mm test object?
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What happens to axial resolution when spatial pulse length is decreased? - ✔✔improves
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How much will a 3.5 MHz pulse be attenuated after passing through 2 cm of soft tissue? -
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✔✔3.5 dB ||
Propagation speed errors result in - ✔✔improper axial position || || || || || || || ||
Enhancement is caused by - ✔✔weakly attenuating structures || || || || || || ||
The Doppler shift frequency is - ✔✔directly proportional to the velocity of the reflector
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The number of frames per second necessary for a real-time image to be flicker free is -
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✔✔more than 15 || ||
,True/False: The SPTA intensity will always be larger than the SATA intensity. - ✔✔True
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The intensity of the ultrasound beam is usually greater at the focal zone because of - ✔✔the
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smaller beam diameter
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If the amplitude is doubled, the intensity is - ✔✔quadrupled
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The attenuation for soft tissue is - ✔✔increased with tissue thickness
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The acoustic impedance of the matching layer - ✔✔can be chosen to improve transmission
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into the body
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True/False: In a pulse-echo system, the quality factor should be made as large as possible. -
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✔✔False
True/False: The beam diameter is constant in the near zone. - ✔✔False
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The operating frequency is dependent on - ✔✔thickness of the crystal
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The period of an ultrasound wave is - ✔✔the time of one wavelength
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The dynamic range of a system is - ✔✔the ratio of smallest to largest power level that the
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system can handle || ||
True/False: The intensity of an ultrasonic beam can be measured with radiation force
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balance. - ✔✔True || ||
, Increasing the pulse repetition period - ✔✔increases the maximum depth that can be
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imaged
Ultrasound bioeffects - ✔✔are not confirmed below 100 mW/cm² SPTA
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True/False: No refraction can occur at an interface if the media impedances are equal. -
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✔✔False
True/False: Smaller transducers always produce smaller beam diameters. - ✔✔False
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True/False: The ultrasound beam profile can be measured with a hydrophone. - ✔✔True
|| || || || || || || || || || || ||
True/False: The pulsed-Doppler system yields better depth resolution than the continuous
|| || || || || || || || || || ||
wave (CW) system. - ✔✔True
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True/False: The gray-scale display was made possible when digital scan converters replaced
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analog scan converters. - ✔✔False
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True/False: Videotape recorders operating at 30 frames per second cannot be used with
|| || || || || || || || || || || || ||
mechanical real-time units because the fram rate is too slow. - ✔✔False
|| || || || || || || || || || ||
True/False: Linear phased array scanners need no form of mechanical focusing because
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focusing is performed electronically. - ✔✔False
|| || || || ||
True/False: The fram rate of real-time scanners depends on the number of lines used to
|| || || || || || || || || || || || || || ||
form the image. - ✔✔True
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questions and correct answers already graded A+ passed 100%
|| || || || || || || ||
Example of nonspecular reflector - ✔✔red blood cells
|| || || || || || ||
What happens to spatial pulse length when frequency increases? - ✔✔decreases
|| || || || || || || || || ||
Axial resolution is dependent on? - ✔✔wavelength
|| || || || || ||
Lateral resolution is dependent on? - ✔✔beam diameter
|| || || || || || ||
Where does the beam of an unfocused transducer diverge? - ✔✔Fraunhofer zone
|| || || || || || || || || || ||
Reverberation artifacts are a result of - ✔✔two or more strong reflecting surfaces
|| || || || || || || || || || || ||
True/False: Grating lobes are essential for the proper operation of a linear phased array. -
|| || || || || || || || || || || || || || ||
✔✔False
True/False: Electronically steered scanners always produce higher resolution images than
|| || || || || || || || || ||
do mechanically steered scanners. - ✔✔False
|| || || || ||
True/False: An annular array scanner uses mechanical beam steering. - ✔✔True
|| || || || || || || || || ||
True/False: A linear sequenced array cannot be dynamically focused. - ✔✔False
|| || || || || || || || || ||
,registration or B-mode alignment - ✔✔Which AIUM test object function utilizes all the
|| || || || || || || || || || || || ||
groups of wires in the AIUM 100 mm test object?
|| || || || || || || || ||
axial resolution - ✔✔Which AIUM test object function utilizes the A group of wires in the
|| || || || || || || || || || || || || || || ||
AIUM 100 mm test object? || || || ||
lateral resolution - ✔✔Which AIUM test object function utilizes the B group of wires in the
|| || || || || || || || || || || || || || || ||
AIUM 100 mm test object? || || || ||
dead zone - ✔✔Which AIUM test object function utilizes the D group of wires in the AIUM
|| || || || || || || || || || || || || || || ||
100 mm test object?
|| || || ||
depth calibration - ✔✔Which AIUM test object function utilizes the C or E groups of wires
|| || || || || || || || || || || || || || || ||
in the AIUM 100 mm test object?
|| || || || || ||
What happens to axial resolution when spatial pulse length is decreased? - ✔✔improves
|| || || || || || || || || || || ||
How much will a 3.5 MHz pulse be attenuated after passing through 2 cm of soft tissue? -
|| || || || || || || || || || || || || || || || || ||
✔✔3.5 dB ||
Propagation speed errors result in - ✔✔improper axial position || || || || || || || ||
Enhancement is caused by - ✔✔weakly attenuating structures || || || || || || ||
The Doppler shift frequency is - ✔✔directly proportional to the velocity of the reflector
|| || || || || || || || || || || || ||
The number of frames per second necessary for a real-time image to be flicker free is -
|| || || || || || || || || || || || || || || || ||
✔✔more than 15 || ||
,True/False: The SPTA intensity will always be larger than the SATA intensity. - ✔✔True
|| || || || || || || || || || || || ||
The intensity of the ultrasound beam is usually greater at the focal zone because of - ✔✔the
|| || || || || || || || || || || || || || || ||
smaller beam diameter
|| || ||
If the amplitude is doubled, the intensity is - ✔✔quadrupled
|| || || || || || || || ||
The attenuation for soft tissue is - ✔✔increased with tissue thickness
|| || || || || || || || || ||
The acoustic impedance of the matching layer - ✔✔can be chosen to improve transmission
|| || || || || || || || || || || || || ||
into the body
|| ||
True/False: In a pulse-echo system, the quality factor should be made as large as possible. -
|| || || || || || || || || || || || || || || ||
✔✔False
True/False: The beam diameter is constant in the near zone. - ✔✔False
|| || || || || || || || || || ||
The operating frequency is dependent on - ✔✔thickness of the crystal
|| || || || || || || || || ||
The period of an ultrasound wave is - ✔✔the time of one wavelength
|| || || || || || || || || || || ||
The dynamic range of a system is - ✔✔the ratio of smallest to largest power level that the
|| || || || || || || || || || || || || || || || || ||
system can handle || ||
True/False: The intensity of an ultrasonic beam can be measured with radiation force
|| || || || || || || || || || || || ||
balance. - ✔✔True || ||
, Increasing the pulse repetition period - ✔✔increases the maximum depth that can be
|| || || || || || || || || || || || ||
imaged
Ultrasound bioeffects - ✔✔are not confirmed below 100 mW/cm² SPTA
|| || || || || || || || ||
True/False: No refraction can occur at an interface if the media impedances are equal. -
|| || || || || || || || || || || || || || ||
✔✔False
True/False: Smaller transducers always produce smaller beam diameters. - ✔✔False
|| || || || || || || || ||
True/False: The ultrasound beam profile can be measured with a hydrophone. - ✔✔True
|| || || || || || || || || || || ||
True/False: The pulsed-Doppler system yields better depth resolution than the continuous
|| || || || || || || || || || ||
wave (CW) system. - ✔✔True
|| || || ||
True/False: The gray-scale display was made possible when digital scan converters replaced
|| || || || || || || || || || || ||
analog scan converters. - ✔✔False
|| || || ||
True/False: Videotape recorders operating at 30 frames per second cannot be used with
|| || || || || || || || || || || || ||
mechanical real-time units because the fram rate is too slow. - ✔✔False
|| || || || || || || || || || ||
True/False: Linear phased array scanners need no form of mechanical focusing because
|| || || || || || || || || || || ||
focusing is performed electronically. - ✔✔False
|| || || || ||
True/False: The fram rate of real-time scanners depends on the number of lines used to
|| || || || || || || || || || || || || || ||
form the image. - ✔✔True
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