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ARDMS SPI /DAVIES SPI FINAL EXAM AND PRACTICE
QUESTIONS 2025 NEWEST TEST BANK COMPLETE
700 QUESTIONS WITH DETAILED VERIFIED
ANSWERS /ALREADY GRADED A+ // LATEST
VERSION!!!
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
Reverberation artifacts are a result of - Answer-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. - 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?
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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
Enhancement is caused by - Answer-weakly attenuating structures 3 / 4
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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
The acoustic impedance of the matching layer - Answer- can be chosen to improve transmission into the body
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