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ardms spi test with 100% correct answers | verified | latest update 2024
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ardms spi test____ is the length that a pulse occupies in space - Correct Answer- ✅SPL
✅
____ wavelength sound creates higher quality images with greater detail -
Correct Answer- shorter
✅
_____ is the actual time that a transducer is creating a pulse - Correct
Answer- pulse duration
✅
A ____ represents a relationship between 2 numbers. It is a relative measure of
intensity or power - Correct Answer- decibel
✅
a pair of waves are in phase. What occurs when these waves interfere? - Correct
Answer- Constructive interference
✅
a particle within a transverse wave is traveling vertically. What is the direction of
the waves propagation? - Correct Answer- Horizontal
A sonographer ____ change pulse duration - Correct Answer- ✅cannot (unless
you change the transducer)
✅
A sonographer adjusts the maximum imaging depth of the ultrasound system.
Which also changes? - Correct Answer- Prp and prg
✅
A sonographer adjusts the output power. Which also changes - Correct
Answer- intensity
✅
Acoustic impedance is a property of the ___ and has a unit of ___ - Correct
Answer- medium, rayls
An acoustic pulse relects from a very smooth boundary where the irregularities
✅
on the surface boundary are much smaller than the pulses wavelength. What
type of reflection is most likely to occur? - Correct Answer- Specular
As power increases, the ____ also increases - Correct Answer- ✅intensity
, ✅
as sound travels through a medium, what term describes the effects of the
medium on the sound wave? - Correct Answer- Acoustic propagation
properties
✅
As the wave travels through a faster medium the wavelength _____ - Correct
Answer- increases
Attenuation and propagation speed are ____ - Correct Answer- ✅unrelated
Attenutation is determined by which factors? - Correct Answer-✅Path lenth and
frequency of sound
Changes in power of a wave are proportional to the waves amplitude squared.
✅
When ½ of the waves orginanal amplitude remains, only ___ of the original
power remains - Correct Answer- ¼
✅
Compressibility describes a characteristic of a medium. Which 2 terms describe
the same property as compressibility? - Correct Answer- Stiffness and
elasticity
Duty factor equals - Correct Answer- ✅pulse duration/prp
Duty factor is ___ related to depth of view - Correct Answer-✅inversely
Half value layer depends upon what? - Correct Answer- ✅Medium and frequency
If amplitude is increased, then so is ____ - Correct Answer-✅power
✅
In a ____ reflection the sound reflects in many directions - Correct
Answer- diffuse
✅
in imaging, the frequency of the wave remains ___ as it propagates through the
body - Correct Answer- constant
✅
In pulsed ultrasound what is the maximum value of the duty factor? - Correct
Answer- Less than 100%
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