ct image review- last unit
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | Contrast resolution
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| show | Low contrast resolution
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| show | WW 3000 WL 500
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| Which of the following would have the shortest gray scale contrast ? WW 3000 WL 500 WW 100 WL 0 WW 1000 WL -500 WW 500 WL 0 | show 🗑
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| show | Noise
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| show | Increasing matrix size
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| show | Dose
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| Which of the following is the ability to discriminate objects a small distance apart? | show 🗑
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| Which of the following HU’s would appear white given a WW 200 & WL 0? | show 🗑
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| Which of the following HU numbers is most accurate? HU: 4 Std:20 HU 2000 Std: 1 HU 40 Std: 10 HU 5 Std: 5 | show 🗑
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| show | 0
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| Which of the following HU’s represents air? | show 🗑
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| Which of the following HU’s represents bone? | show 🗑
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| show | change DFOV
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| WW 1000 WL 0.. Which change would make a longer gray scale? | show 🗑
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| What type of data is needed for retrospective reconstruction | show 🗑
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| Which of the following provides the best spatial resolution? | show 🗑
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| show | 256 x 256
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| show | linear attenuation coefficient
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| show | raw or scan
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| What is the process of using raw data to create an image? | show 🗑
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| show | scan FOV
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| What is the area of the data that is displayed for radiologist viewing? | show 🗑
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| show | multiplanar reconstruction MPR
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| What type of data is needed to perform retrospective reconstruction? | show 🗑
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| What type of image reconstruction allows for optimal image quality at a reduced dose? | show 🗑
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| show | interpolation
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| Which of the following would appear white given the WW 2000 and WL 0? 2000 -2000 100 -100 | show 🗑
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| What does window level refer to? | show 🗑
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| show | The number of shades of gray
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| show | lung tissue -1000
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| Which of the following will best display bone tissue? Ww 3000 WL 400 WW 2000 WL 50 WW 500 WL 0 WW 3000 WL -1000 | show 🗑
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| Which of the following would shorten the gray scale of an image if you originally used ww 2000, wl 500 Change ww to 1000 Change the ww to 3000 Change the wl to 1000 Change the wl to 100 | show 🗑
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| What is the HU for water? | show 🗑
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| What is the HU for bone? | show 🗑
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| Which of the following would be the most accurate representation of a tissue? A. HU 0 STD. 100 B. HU 100 STD 23 C. HU -400 STD 10 D. HU 0 STD 50 | show 🗑
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| show | HU 0 , STD 5
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| show | bone calcium
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| spatial resolution in CT refers to the | show 🗑
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| show | low contrast resolution
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| show | spatial resolution in CT
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| to get the best spatial resolution, the matrix size should be: | show 🗑
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| contrast resolution in CT refers to the | show 🗑
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| show | contrast resolution
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| show | noise
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| a larger DFOV, an increase in slice thickness, or in an increase in dose would decrease: | show 🗑
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| decreasing the spatial resolution would equal | show 🗑
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| increasing the contrast resolution would equal | show 🗑
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| show | larger pixel size
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| show | larger pixel size
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| increasing the spatial resolution would equal | show 🗑
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| decreasing contrast resolution would equal | show 🗑
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| increasing patient dose would equal | show 🗑
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| increasing noise would equal | show 🗑
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Created by:
elliekhughes