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ARDMS SPI EXAM 500 |Q & A
|ALREADY GRADED A+ |UPDATE
Question : Example of nonspecular reflector
CORRECT ANSWER : red blood cells
Question : What happens to spatial pulse length when
frequency increases?
CORRECT ANSWER : decreases
Question : Axial resolution is dependent on?
CORRECT ANSWER : wavelength
Question : Lateral resolution is dependent on?
CORRECT ANSWER : beam diameter
Question : Where does the beam of an unfocused
transducer diverge?
CORRECT ANSWER : Fraunhofer zone
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Question : Reverberation artifacts are a result of
CORRECT ANSWER : two or more strong reflecting
surfaces
Question : True/False: Grating lobes are essential for the proper operation of a linear phased array.
CORRECT ANSWER : False
Question : True/False: Electronically steered scanners always produce higher resolution images than do mechanically steered scanners.
CORRECT ANSWER : False
Question : True/False: An annular array scanner uses mechanical beam steering.
CORRECT ANSWER : True
Question : True/False: A linear sequenced array cannot be dynamically focused.
CORRECT ANSWER : False
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Question : Which AIUM test object function utilizes all
the groups of wires in the AIUM 100 mm test object?
CORRECT ANSWER : registration or B-mode
alignment
Question : Which AIUM test object function utilizes the
A group of wires in the AIUM 100 mm test object?
CORRECT ANSWER : axial resolution
Question : Which AIUM test object function utilizes the
B group of wires in the AIUM 100 mm test object?
CORRECT ANSWER : lateral resolution
Question : Which AIUM test object function utilizes the
D group of wires in the AIUM 100 mm test object?
CORRECT ANSWER : dead zone
Question : Which AIUM test object function utilizes the
C or E groups of wires in the AIUM 100 mm test object?
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CORRECT ANSWER : depth calibration
Question : What happens to axial resolution when spatial
pulse length is decreased?
CORRECT ANSWER : improves
Question : How much will a 3.5 MHz pulse be attenuated
after passing through 2 cm of soft tissue?
CORRECT ANSWER : 3.5 dB
Question : Propagation speed errors result in
CORRECT ANSWER : improper axial position
Question : Enhancement is caused by
CORRECT ANSWER: weakly attenuating structures
Question : The Doppler shift frequency is
CORRECT ANSWER : directly proportional to the
velocity of the reflector