Exam (elaborations)
ARDMS SPI 500 with 100% correct answers | verified | latest update 2024
ARDMS SPI 500 with 100% correct answers | verified | latest update 2024
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ARDMS SPI 500A sound wave is - CORRECT ANSWER- ✅mechanical, longitudinal
A compression area of a sound wave is - CORRECT ANSWER-✅high pressure,
high density
A rarefaction area of a sound wave is - CORRECT ANSWER- ✅low pressure,
low density
Which is considered an acoustic variable - CORRECT ANSWER- ✅pressure
Which is a unit for pressure - CORRECT ANSWER-✅N/m2
Which is a unit for density - CORRECT ANSWER-✅lbs/cm3
Which wave propagates in a medium - CORRECT ANSWER- ✅sound
The range for ultrasound is - CORRECT ANSWER- ✅greater than 20KHz
✅
____ is the number of wave cycles per second - CORRECT
ANSWER- frequency
✅1,000 cycles per second
One kilohertz is equal to - CORRECT ANSWER-
One megahertz is equal to - CORRECT ANSWER-✅1,000,000 cycles per
second
✅
The useful frequency range for clinical imaging ultrasound is - CORRECT
ANSWER- 2 MHz to 10 MHz
Frequency is determined by the - CORRECT ANSWER- ✅source
✅
Frequency affects all of the following, except: wavelength, resolution, penetration,
impedance - CORRECT ANSWER- impedance
The times per cycle is - CORRECT ANSWER- ✅period
, The period for a 5 MHz probe is - CORRECT ANSWER- ✅0.2usec
If frequency increases, period will - CORRECT ANSWER-✅decreases
Period is determined by the - CORRECT ANSWER-✅source
✅
Period multiplied by the number of cycles in a pulse equals - CORRECT
ANSWER- pulse duration
The distance between cyclical peaks is - CORRECT ANSWER- ✅wavelength
The symbol for wavelength is - CORRECT ANSWER- ✅lambda
The wavelength of a 5 MHz probe in soft tissue is - CORRECT ANSWER- ✅0.3
mm
✅
As frequency increases, wavelength (assume same medium) - CORRECT
ANSWER- decreases
Wavelength is determined by the - CORRECT ANSWER- ✅source and medium
As wavelength decreases - CORRECT ANSWER- ✅resolution improves
The rate at which a sound vibration propagates through a medium is called all of
✅
the following, except: sound speed, prop speed, speed of sound, velocity -
CORRECT ANSWER- velocity
✅
The units for propagation speed include all the following, except: km/sec, mph,
msec, mm/sec - CORRECT ANSWER- msec
The average speed of sound in soft tissue is - CORRECT ANSWER- ✅1540
m/sec
✅
Arrange the following in increasing order of sound speed in soft tissue -
CORRECT ANSWER- air, fat, muscle, soft tissue, muscle, bone
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