Quiz
Chapter 13 - Edelman
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Perguntas do quiz (25)
1Which of the following does not decrease temporal resolution?
- ALower frame rate
- BDeeper imaging
- CMulti-focus
- DNarrower sector
2Which of the following is relative to improved temporal resolution?
- AColor Doppler
- BMore gray shades
- CMore detail
- DHigher frame rate
3A sonographer adjusts an ultrasound scan to double the depth of view, what happens to the frame rate?
- AIt is halved
- BIt is doubled
4Which improves when frame rate increases?
- ALateral resolution
- BTemporal resolution
- CSpatial resolution
5A sonographer adjusts the sector size from 90 to 45 degrees (halves it). Frame rate was unchanged. What else must have happened?
- ATemporal resolution was doubled
- BImaging depth was halved
- CLine density was doubled
6A sonographer adjusts sector size from 90 to 45 degrees (halves it). Nothing else changes. What happens to the frame rate?
- AIt is doubled
- BIt remains unchanged
- CIt is halved
7A sonographer increases the line density from 1 line per degree of sector to 3 lines per degree of sector. What is most likely to happen?
- AFrame rate increases
- BTemporal resolution decreases
- CImaging quality decreases
- DTemporal resolution increases
8A sonographer using a phased array turns off the multi-focus feature. What is most likely to happen?
- AFrame rate decreases
- BTemporal resolution degrades
- CTemporal resolution improves
9A sonographer adjusts an ultrasound scan to double the depth. If the frame rate remains the same, what also occurs?
- AIncreased line density
- BWider sector
- CMulti-focus imaging turned on
- DNarrower sector
10A sonographer reduces the sector angle from 90 degrees to 30 degrees. At the same time, the US system automatically increases the line density from 1 line per degree to 3 lines per degree. No other changes are made. What happens to temporal resolution?
- AIncreases
- BDecreases
- CRemains unchanged
11Which of the following is most important in determining the frame rate of a system?
- ASpeed of sound in the medium
- BTransducer frequency
- Cdynamic range of the receiver
12A sonographer reduces the sector from 90 degrees to 30 degrees. At the same time, the US system automatically increases the line density from 1 line per degree to 2 lines per degree. No other changes are made. What happens to the frame rate?
- AIncreases
- BDecreases
- CRemains unchanged
13Which of the following is most important in determining the frame rate of a system?
- ADepth of view
- BTransducer frequency
- CDynamic range of the receiver
14What is the frame rate if each image of the US system is created in 0.02 seconds (1/50 seconds)?
- A20 Hz
- B100 Hz
- C50 Hz
15What is the time needed to make a single image if the frame rate of an ultrasound system is 20 Hz?
- A1 s
- B0.02 s
- C0.05 s
16The critical factor in determining frame rate, line density, and imaging depth is the transducer style.
- AVerdadeiro
- BFalso
17The number of lines per frame and the frame rate determine the frequency.
- AVerdadeiro
- BFalso
18The number of lines per frame and the frame rate determine the pulse repetition frequency.
- AVerdadeiro
- BFalso
19If the imaging depth of a scan is 15 cm and there are 100 lines in the image, then the number of pulses making up the scan is 1500.
- AVerdadeiro
- BFalso
20If the imaging depth of a scan is 15 cm and there are 100 lines in the image, then the number of pulses making up the scan is 100.
- AVerdadeiro
- BFalso
21If 100 scan lines make up an image and the frame rate is 30 per second, then the transducer's frequency is 3,000 Hz.
- AVerdadeiro
- BFalso
22If 100 scan lines make up an image and the frame rate is 30 per second, then the system's pulse repetition frequency is 3,000 Hz.
- AVerdadeiro
- BFalso
23When the frame rate is 30 Hz, how long does it take to create a frame?
- A30 s
- B3 s
- C1/30 s
- D1/3 s
24Under certain conditions, an ultrasound system creates each image in 0.01 seconds. What is the frame rate?
- A1 Hz
- B100 s
- C100 Hz
25What is the fundamental limitation of temporal resolution?
- AImaging depth
- BSpeed of sound in the medium
- CLine density
- DSector Size
Informações
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- Review Questions
- Autor
- Kayla Botner
- Idioma
- English
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