ARDMS SPI Exam |Complete Questions with Correct Answers Graded A+

ARDMS SPI Exam |Complete Questions with Correct Answers Graded A+ When 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 C) 20 Mhz D) 20 kHz 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 18. The number of pulses per second is called: A) PRF B) PD C) SPL D) PRP A) PRF 19. What is the goal for better temporal resolution? A) Faster frame rate B) Shorter SPL C) Narrow beam width D) Decrease penetration A) Faster frame rate 20. If the depth is increased, what change will occur to the PRP? A) Decrease B) No change C) Increase D) Halved C) Increase 21. Frequency is reduced from 8MHz to 4MHz, what will be the result to the acoustic velocity? A) Increase B) No change C) Doubled D) Decrease B) No change 22. Which of the following refers to the height of the sound wave? A) Rarefaction B) Amplitude C) Intensity D) Power B) Amplitude 23. Which transducer will have the most penetration? A) 8 MHz linear transducer B) 6 MHz tightly curved array C) 2 MHz curvilinear array D) 4 MHz phased array C) 2 MHz curvilinear array 24. When dot-like reflectors appear as horizontal lines in the far field, what is the cause? A) Poor temporal resolution B) Wide beam width C) Refraction D) Broken crystal B) Wide beam width 25. Which transducer will provide optimal depth resolution? A) 4 MHz phased array B) 2 MHz curvilinear array C) 10 MHz linear array D) 6 MHz endocavity array C) 10 MHz linear array 26. To improve the system frame rate, what action can be taken? A) Increase frequency B) Decrease PRF C) Decrease line density D) Increase sector size C) Decrease line density 27. The resolution used to distinguish between closely spaced objects is known as: A) lateral B) range C) temporal D) axial A) lateral 28. Why does increasing the number of scan lines improve lateral resolution? A) The amount of work will increase and make frame rate faster B) There will be higher line density and narrow beams C) The more scan lines, the deeper the sound will penetrate D) Increasing scan lines will not improve lateral resolution B) There will be higher line density and narrow beams 29. Which statement is not true regarding PRF? A) Increasing PRF improves frame rate B) PRF and duty factor are inversely related C) PRF depends of the depth D) PRF refers to how many pulses are fired in one second B) PRF and duty factor are inversely related 30. Which actions will adjust the spatial resolution? A) Scan lines and transducer frequency B) Sector size and reflection C) Focal points and frame rate D) Frequency and PRF A) Scan lines and transducer frequency 1. A wide bandwidth and low quality factor contribute to: A) better penetration. B) better focusing. C) better axial resolution. D) better frame rate. C) better axial resolution. 2. The transducer element becomes mechanical when: A) it is used for mechanical focusing. B) it is hit with electrical voltage and converts the energy into sound. C) it never becomes mechanical. D) it is cracked. B) it is hit with electrical voltage and converts the energy into sound. 3. Quality factor will lower when: A) bandwidth widens. B) the beam former sets a delay. C) there is a longer pulse. D) phasing occurs. A) bandwidth widens. 4. Which transducer type will have the lowest density in the far field? A) 4 MHz phased array B) 3.5 MHz curvilinear array C) 6 MHz endocavity array D) 9 MHz linear array C) 6 MHz endocavity array 5. Which transducer uses time delays to electronically steer the beam? A) Curved array B) Annular C) Linear sequential array D) Phased array D) Phased array