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ARDMS - SPI Exam with 100% correct answers | verified | latest update 2024
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ARDMS - SPI ExamWhen the direction of the wave propagation is parallel to the particle motion of
the medium, the wave being transmitted is called a:
A) surface wave.
B) longitudinal wave.
✅✅
C) transverse wave.
D) non-linear sound. - -B) longitudinal wave
If the sound beam attenuated 6 dB, what will happen to the overall intensity?
A) Quadrupled
B) Doubled
✅✅
C) Halved
D) Quartered - -D) Quartered
Frequency increased from 3 MHz to 6 MHz, what will happen to wavelength?
A) Doubled
B) Quadrupled
✅✅
C) Halved
D) Quartered - -C) Halved
Intensity is equal to:
A) power/area
B) propagation speed/frequency
✅✅
C) density x propagation speed
D) area/power - -A) power/area
5. What is important when selecting a transducer frequency?
A) Depth
B) Power
✅✅
C) Velocity
D) Propagation speed - -A) Depth
6. Frequency is a factor in:
A) impedance
B) tissue attenuation
C) propagation speed
,D) tissue density - ✅✅-B) tissue attenuation
7. Which medium interface will have the greatest sound transmission?
A) Soft tissue to water
B) Organ to organ
✅✅
C) Bone to organ
D) Lung to soft tissue - -B) Organ to organ
8. If there is a small impedance mismatch between two mediums, what will
result?
A) There will be a small reflection
B) There will be a large reflection
✅✅
C) All sound will transmit
D) No sound will transmit - -A) There will be a small reflection
9. Which property of sound is measured in Rayls?
A) Intensity
B) Impedance
✅✅
C) Density
D) Propagation speed - -B) Impedance
10. If sound energy is reduced by 50%, how many decibels were lost?
A) 6 dB
B) 3 dB
✅✅
C) 0 dB
D) 10 dB - -B) 3 dB
11. To improve the quality of the motion during an electrocardiogram, which
resolution should be improved?
A) Transverse resolution
B) Lateral resolution
✅✅
C) Axial resolution
D) Temporal resolution - -D) Temporal resolution
12. Ultrasound frequency begins at:
A) 2 Hz
B) 20 Hz
, ✅✅-D) 20 kHz
C) 20 Mhz
D) 20 kHz -
13. An increase in which property will increase the propagation speed?
A) Period
B) Bulk modulus
✅✅
C) Frequency
D) Intensity - -B) Bulk modulus (stiffness)
14. A technician is using a 6 MHz transducer at a depth of 4cm, what is the
attenuation coefficient?
A) 1/2 dB/cm
B) 8 dB/cm
✅✅
C) 6 dB/cm
D) 3 dB/cm - -D) 3 dB/cm
15. Which reflector type requires a specific angle for optimal imaging?
A) Diffuse
B) Specular
✅✅
C) Rayleigh's scattering
D) Scattering - -B) Specular
16. A difference between the incident angle and the transmitted angle, means
which process has happened?
A) Reflection
B) Refraction
✅✅
C) Rarefaction
D) Absorption - -B) Refraction
17. What trade-off is made when there is an increase in the number of scan
lines?
A) Axial resolution for lateral resolution
B) Penetration for axial resolution
✅✅
C) Temporal resolution for lateral resolution
D) Temporal resolution for penetration - -C) Temporal resolution for lateral
resolution
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