1|Page
SPI EXAM NEWEST 2025 COMPLETE ALL
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
Example of nonspecular reflector - .....ANSWER ...✔✔
red blood cells
What happens to spatial pulse length when frequency
increases? - .....ANSWER ...✔✔ decreases
Axial resolution is dependent on? - .....ANSWER ...✔✔
wavelength
Lateral resolution is dependent on? - .....ANSWER
...✔✔ beam diameter
Where does the beam of an unfocused transducer
diverge? - .....ANSWER ...✔✔ Fraunhofer zone
,2|Page
Reverberation artifacts are a result of - .....ANSWER
...✔✔ two or more strong reflecting surfaces
True/False: Grating lobes are essential for the proper
operation of a linear phased array. - .....ANSWER
...✔✔ False
True/False: Electronically steered scanners always
produce higher resolution images than do mechanically
steered scanners. - .....ANSWER ...✔✔ False
True/False: An annular array scanner uses mechanical
beam steering. - .....ANSWER ...✔✔ True
True/False: A linear sequenced array cannot be
dynamically focused. - .....ANSWER ...✔✔ False
registration or B-mode alignment - .....ANSWER ...✔✔
Which AIUM test object function utilizes all the groups of
wires in the AIUM 100 mm test object?
axial resolution - .....ANSWER ...✔✔ Which AIUM test
object function utilizes the A group of wires in the AIUM
100 mm test object?
,3|Page
lateral resolution - .....ANSWER ...✔✔ Which AIUM
test object function utilizes the B group of wires in the
AIUM 100 mm test object?
dead zone - .....ANSWER ...✔✔ Which AIUM test
object function utilizes the D group of wires in the AIUM
100 mm test object?
depth calibration - .....ANSWER ...✔✔ 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? - .....ANSWER ...✔✔ improves
How much will a 3.5 MHz pulse be attenuated after
passing through 2 cm of soft tissue? - .....ANSWER
...✔✔ 3.5 dB
Propagation speed errors result in - .....ANSWER
...✔✔ improper axial position
, 4|Page
Enhancement is caused by - .....ANSWER ...✔✔
weakly attenuating structures
The Doppler shift frequency is - .....ANSWER ...✔✔
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 - .....ANSWER ...✔✔
more than 15
True/False: The SPTA intensity will always be larger
than the SATA intensity. - .....ANSWER ...✔✔ True
The intensity of the ultrasound beam is usually greater at
the focal zone because of - .....ANSWER ...✔✔ the
smaller beam diameter
If the amplitude is doubled, the intensity is - .....ANSWER
...✔✔ quadrupled
The attenuation for soft tissue is - .....ANSWER ...✔✔
increased with tissue thickness
SPI EXAM NEWEST 2025 COMPLETE ALL
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
Example of nonspecular reflector - .....ANSWER ...✔✔
red blood cells
What happens to spatial pulse length when frequency
increases? - .....ANSWER ...✔✔ decreases
Axial resolution is dependent on? - .....ANSWER ...✔✔
wavelength
Lateral resolution is dependent on? - .....ANSWER
...✔✔ beam diameter
Where does the beam of an unfocused transducer
diverge? - .....ANSWER ...✔✔ Fraunhofer zone
,2|Page
Reverberation artifacts are a result of - .....ANSWER
...✔✔ two or more strong reflecting surfaces
True/False: Grating lobes are essential for the proper
operation of a linear phased array. - .....ANSWER
...✔✔ False
True/False: Electronically steered scanners always
produce higher resolution images than do mechanically
steered scanners. - .....ANSWER ...✔✔ False
True/False: An annular array scanner uses mechanical
beam steering. - .....ANSWER ...✔✔ True
True/False: A linear sequenced array cannot be
dynamically focused. - .....ANSWER ...✔✔ False
registration or B-mode alignment - .....ANSWER ...✔✔
Which AIUM test object function utilizes all the groups of
wires in the AIUM 100 mm test object?
axial resolution - .....ANSWER ...✔✔ Which AIUM test
object function utilizes the A group of wires in the AIUM
100 mm test object?
,3|Page
lateral resolution - .....ANSWER ...✔✔ Which AIUM
test object function utilizes the B group of wires in the
AIUM 100 mm test object?
dead zone - .....ANSWER ...✔✔ Which AIUM test
object function utilizes the D group of wires in the AIUM
100 mm test object?
depth calibration - .....ANSWER ...✔✔ 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? - .....ANSWER ...✔✔ improves
How much will a 3.5 MHz pulse be attenuated after
passing through 2 cm of soft tissue? - .....ANSWER
...✔✔ 3.5 dB
Propagation speed errors result in - .....ANSWER
...✔✔ improper axial position
, 4|Page
Enhancement is caused by - .....ANSWER ...✔✔
weakly attenuating structures
The Doppler shift frequency is - .....ANSWER ...✔✔
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 - .....ANSWER ...✔✔
more than 15
True/False: The SPTA intensity will always be larger
than the SATA intensity. - .....ANSWER ...✔✔ True
The intensity of the ultrasound beam is usually greater at
the focal zone because of - .....ANSWER ...✔✔ the
smaller beam diameter
If the amplitude is doubled, the intensity is - .....ANSWER
...✔✔ quadrupled
The attenuation for soft tissue is - .....ANSWER ...✔✔
increased with tissue thickness
