ARDMS SPI Exam Review TEST 12

October 14, 2017 By Rana Waqar Leave a Comment

1. With 6 bits, what is the largest number of different shades of gray that can be stored?
- a. 64
- b. 8
- c. 256
- d. 16
2. In B-mode imaging, the stronger the return echo,
- a. The darker the dot on the display
- b. The brighter the dot on the display
- c. The worse the temporal resolution
- d. The weaker the transmit power
3. What happens to a digital image when the pixel density is increased?
- a. There is more spatial detail
- b. There is less spatial detail
- c. The temporal resolution increases
- d. There are more shades of gray
4. You are using a transducer that produces a beam with a very wide elevational plane. Which of the following problems are you most likely to encounter as a result?
- a. Slice thickness artifact
- b. Increased reverberation
- c. Increased side lobes
- d. Increased electrical interference
5. The “useful” artifact that one might see behind a weakly attenuating structure is:
- a. Shadowing
- b. Enhancement
- c. Reflection
- d. Refraction
6. When you adjust the output power control, you affect the following system component:
- a. Pulser
- b. Memory
- c. Scan converter
- d. Receiver
7. The part of the receiver that reduces low-level system noise is the:
- a. Demodulation
- b. Compensation
- c. Amplification
- d. Rejection
8. What receiver function is responsible for decreasing the difference between the largest and smallest received signal amplitudes?
- a. Amplification
- b. Compensation
- c. Compression
- d. Rejection
9. Sound bouncing off of a strong reflector and producing an image on the wrong location on the display is:
- a. Range ambiguity
- b. Mirror image artifact
- c. Slice thickness artifact
- d. Enhancement
10. What must be known in order to calculate distance to a reflector?
- a. Attenuation, speed, density
- b. Attenuation, impedance
- c. Density, speed
- d. Travel time, speed

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